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Meisterfeldia bitsevi sp. nov. (Figs 1���3; Table 1) Description: shell bilaterally symmetrical, elongated oval, laterally not flattened, colorless, transparent. The dorsal side is slightly convex, posterior end curved to ventral side. The aperture is almost circular, placed on the ventral side, which is without any invagination and symmetrically convex as the dorsal side. Shell surface smooth, without mineral inclusions (Figs 1���3). Measurements: shell length��� 30.43���33.40 ��m; shell breadth ��� 15.70���18.10 ��m; shell depth���15.80���17.90 ��m; aperture width��� 5.10���6.20 ��m; aperture height��� 4.90���6.10 ��m (Table 1). * Shell measurements are shown in Fig. 3. List of associated testate amoebae: Trigonopyxis arcula, Centropyxis aerophila, C. sylvatica, C. sylvatica var. minor, C. eurystoma var. parvula, Plagiopyxis declivis, P. penardi, Schoenbornia humicola, Difflugia nana, Trinema lineare var. minuscula . Type locality: Urban park ���Bitsevsky forest���, Moscow (coordinates 55.59�� N 37.55�� E). Mixed spruce-birchlinden forest. Hollows on five trees at a height of 1.5 m. Semi-decomposed litter with a small number of mineral particles. Type specimen: Laboratory of Soil Bioindication, Department of Soil Geography, Faculty of Soil Science, Lomonosov Moscow State University, slide No. 1-2020. Etymology: species is named after the name of urban park ���Bitsevsky forest���, where it was found for the first time. Differential diagnosis: from the other species of the genus Meisterfeldia (Figs 4, 5) new species distinguished by its larger size and lack of lateral compression (in contrast with M. chibisovi, M. wegeneri, M. polygonia), slightly elliptic aperture (in contrast with M. vanhoornei) and lack of pseudostomal neck and apertural collar (in contrast with M. turfacea)., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2021, Meisterfeldia bitsevi-new testate amoeba of the family Cryptodifflugiidae Jung 1942 (Amoebozoa: Arcellinida) from the tree hollow in the urban park (Moscow Russia) with a key to species of the genus Meisterfeldia, pp. 595-600 in Zootaxa 4908 (4) on pages 596-598, DOI: 10.11646/zootaxa.4908.4.11, http://zenodo.org/record/4447044

Key to the species of the genus Meisterfeldia 1. Shell length exceeds 30 µm...................................................................... M. bitsevi 1’. Shell length less than 20 µm............................................................................ 2 2. Shell with distinct pseudostomal neck and apertural lip.............................................. M. turfacea 2’. Shell without pseudostomal neck and apertural lip........................................................... 3 3. Shell cross section is circular. There is no invagination on the ventral side. Shell length 13–16 µm.......... M. vanhoornei 3’. Shell is more or less flattened. There is more or less prominent invagination on the ventral side. Shell length 6–11 µm..... 4 4. Aperture circular............................................................................ M. chibisovi 4’. Aperture elliptic...................................................................................... 5 5. Shell flattened (shell depth:breadth ratio is 0.60–0.70)............................................... M. wegeneri 5’. Shell slightly flattened (shell depth:breadth ratio is 0.85–0.95)........................................ M. polygonia

Frenopyxis gen. nov. Description. Shell bilaterally symmetrical, broad elliptic, sometimes almost circular, dorsoventrally flattened, yellowish to colorless; aperture is placed slightly eccentrically on a ventral part of a shell at the bottom of a wide funnel (invagination); aperture usually drop-shaped with narrow side oriented toward closest side; sometimes aperture circular. There is an internal thick organic lip surrounding an aperture and continuing in a bridle, which connects an aperture with the internal side of a shell wall and broaden in the place of connection of a bridle and a shell wall. Etymology. The name of new taxon reflects its most characteristic feature, i.e. bridle (from Latin��� Frenum). Type species. Frenopyxis stierlitzi sp. nov. Related genera. New genus differs from the type genus of the family Centropyxis Stein, 1857 by an internal thick organic lip surrounding an aperture and continuing in a bridle, which connects an aperture with the internal side of a shell wall and broaden in the place of connection of a bridle and a shell wall. New genus differs from the genus Armipyxis Dekhtjar, 2009 by luck of internal transversal diaphragms with circular openings, which subdivide internal shell volume into two parts; internal bridle of the new genus connects aperture and shell wall (as in Armipyxis) but does not subdivide the shell into separate sections., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2020, Frenopyxis stierlitzi gen. nov., sp. nov. - new testate amoeba (Amoebozoa Arcellinida) from the urban parks with notes on the systematics of the family Centropyxidae Jung, 1942, pp. 384-394 in Zootaxa 4885 (3) on page 385, DOI: 10.11646/zootaxa.4885.3.4, http://zenodo.org/record/4296751, {"references":["Dekhtjar, M. N. (2009) The peculiarities of shell morphology and taxonomic composition of the family Centropyxidae (Testacealobosia, Rhizopoda). Vestnik zoologii, 43, 297 - 303. [in Russian with English summary]"]}

Frenopyxis stierlitzi sp. nov. (Figs 1���3; Table 1) Description. Shell bilaterally symmetrical, broad elliptic, sometimes almost circular, dorsoventrally flattened, yellowish to colorless; aperture is placed slightly eccentrically on a ventral part of a shell at the bottom of a wide funnel (invagination); aperture usually drop-shaped with narrow side oriented toward closest side; sometimes aperture circular (Figs 1j ��l). There is an internal thick organic lip surrounding an aperture and continuing in a bridle, which connects an aperture with the internal side of a shell wall and broaden in the place of connection of a bridle and a shell wall. Shell surface smooth on a ventral side and covered densely by mineral particles on a dorsal side. Organic cement with simple circular pores regularly and densely distributed on the surface. This feature is likely to cause the shell wall to become fragile and thus need to be reinforced by an apertural lip and a bridle connected with a shell wall. Measurements. Shell length [character 1���see Fig. 3]��� 37.80���45.90 ��m; shell breadth [character 2]��� 32.40��� 37.80 ��m; shell depth [character 4]��� 13.50���24.30 ��m; distance between the aperture and the top edge of the shell [character 3]��� 8.10���15.30 ��m; aperture length [character 6]��� 8.10���15.12 ��m; aperture breadth [character 5]��� 6.21���13.50 ��m; bridle length [character 7] ��� 5.40���8.20 ��m; bridle breadth [character 8]��� 3.24���6.75 ��m. List of associated testate amoebae. Samples from hollows of the Bitsevsky forest contained few species: Trigonopyxis arcula, T. minuta, Centropyxis aerophila, C. delicatula, C. sylvatica v. minor , Cyclopyxis eurystoma v. parvula; local community from the litter in a shallow hollow of the Tsuga canadensis tree-trunk from Babelsberg Park is more diverse and included Arcella arenaria v. compressa , Centropyxis constricta, C. delicatula, C. sylvatica, Cyclopyxis eurystoma, Trigonopyxis arcula, Phryganella acropodia, Valkanovia elegans, Euglypha anadonta, Corythion dubium, C. pulchellum, Trinema complanatum, and T. complanatum v. elongata. Type locality. Urban park ���Bitsevsky forest���, Moscow (coordinates 55.59�� N 37.55�� E). Mixed spruce-birchlinden forest. Hollow on spruce tree at a height of 0.5 m. Semi-decomposed litter with a small number of fine mineral particles. Type specimen. Laboratory of Soil Bioindication, Department of Soil Geography, Faculty of Soil Science, Lomonosov Moscow State University, slide No. 2-2020. Etymology. The species is named after Max Otto von Stierlitz one of the lead character in a popular Russian book series written in the 1960s by novelist Yulian Semyonov and of the television adaptation ���Seventeen Moments of Spring���, directed by Tatyana Lioznova and starring by Vyacheslav Tikhonov. Stierlitz has become a stereotypical spy in Soviet and post-Soviet culture, similar to James Bond in Western culture. Stierlitz lived in Babelsberg (Potsdam, Germany) where one of the populations of the new species was discovered. Moreover, this name underlines hidden nature of the habitat (viz. tree hollows), where new species was discovered., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2020, Frenopyxis stierlitzi gen. nov., sp. nov. - new testate amoeba (Amoebozoa Arcellinida) from the urban parks with notes on the systematics of the family Centropyxidae Jung, 1942, pp. 384-394 in Zootaxa 4885 (3) on pages 385-388, DOI: 10.11646/zootaxa.4885.3.4, http://zenodo.org/record/4296751

Bobrov, Anatoly, Qin, Yangmin, Payne, Richard J. (2019): ANATOLY BOBROV, YANGMIN QIN & RICHARD J. PAYNE (2019) A new testate amoebae species Planhoogenraadia wuchanica sp. nov. from subtropical forest soils in Wuhan, central China Zootaxa, 4550: 289-294. Zootaxa 4614 (3): 600-600, DOI: https://doi.org/10.11646/zootaxa.4614.3.12

Testate amoebae diversity from 28 surface (0-3 cm depth) soil samples found near Cuzco (6 samples), in Machu Piсchu (17 samples), in Aguas Calientes (5 samples), and one bottom sediment sample from the Lake Titicaca near the Puno collected during March of 2016 were analyzed. The 144 testate amoebae species and infra-specific taxa belonging to 27 genera were identified. Nineteen amoebae have not been identified to species level and likely represent new taxa. Species richness varied from one to 54 taxa per sample. The highest diversity was found in rainforests followed by those in meadows and agave habitats. The only bottom sample from Lake Titicaca has yielded two hydrobiont species from the genus Difflugia. In the course of the study, several rare species with limited geographical distribution were observed, namely Centropyxis castaneus, C. compressa, C. deflandriana, C. latideflandriana, C. cf. ohridensis, C. cf. ovoides, C. cf. pannosus, C. stenodeflandriana, Cyclopyxis plana, C. profundistoma, Apodera vas, Argynnia retorta, A. spicata, Certesella certesi, Trachelcorythion pulchellum. Our study fills a geographical gap in the distribution of some flagship species with restricted geographic distribution, e.g. Apodera vas and Certesella certesi in Peru. The results illustrate the continuity of expansion species along the Pacific coast. Resumen La diversidad de amebas testadas de la capa superior del suelo (0-3 cm de profundidad) fue analizada en 28 de muestras recolectadas cerca de Сuzco (seis muestras), Machu Picchu (17 muestras) y Aguas Calientes (cinco muestras), así como una muestra de sedimentos del fondo recolectada en el lago Titicaca, cerca de la ciudad de Puno, en marzo 2016. Se identificaron 144 especies de amebas testadas y taxones infra-específicos pertenecientes a 27 géneros. Un total de 19 amebas no han sido identificadas a nivel de especie y probablemente sean nuevos taxones. La riqueza de especies varía de uno a 54 taxones por muestra. La mayor diversidad fue encontrada en los bosques pluviales, prados y hábitats de agave. En los sedimentos del fondo del lago Titicaca se encontraron 2 especies hidrobiónticas del género Difflugia. En el estudio se encontraron varias especies raras con una limitada distribución geográfica, tales como: Centropyxis castaneus, C. compressa, C. deflandriana, C. latideflandriana, C. cf. ohridensis, C. cf. ovoides, C. cf. pannosus, C. stenodeflandriana, Cyclopyxis plana, C. profundistoma, Apodera vas, Argynnia retorta, A. spicata, Certesella certesi y Trachelcorythion pulchellum. Nuestro estudio llena un vacío en la distribución geográfica de algunas especies importantes de Perú, que tienen una distribución geográfica limitada, por ejemplo: Apodera vas y Certesella certesi. Los resultados muestran la continuidad de la expansión de las especies a lo largo de la costa del Pacífico.

Planhoogenraadia wuchanica Qin, 2019 (Figs. 1–2) Comparison with similar species. C ompared to species with similar morphology (P. bonetti and P. daurica) Planhogenraadia wuchanica differs by smaller size (Table 2). The ventral region of P. wuchanica is not as flat as other Planhoogenraadia species. The smaller shell length, narrower aperture and distinctive ‘cap’ structure make P. wuchanica morphologically distinct from the similar taxa P. acuta, P. alta and P. asturica. Many protists exhibit phenotypic plasticity which can lead to morphological variability that could be mistakenly assumed to represent taxonomic difference (Mulot et al. 2017). However, it is improbable that phenotypic plasticity is the case here. Diagnostic features such as the ‘cap’ are clearly-developed structures not present in other, related taxa, whereas phenotypic plasticity is typically associated with variability in properties such as length and volume (Ogden & Hedley 1980; Arrieira et al. 2016; Mulot et al. 2017). The coefficients of variation we identify are small, further suggesting that phenotypic plasticity is unlikely. It is overwhelmingly probable that Planhogenraadia wuchanica is a previously-unrecorded species.

Description of Planhoogenraadia wuchanica sp. nov. Description. The shell of this species is elongate-elliptical with slight constriction in the aperture region. The shell is grey and consists of mineral particles of variable size embedded in organic cement. The dorsal side of the shell is evenly convex. The transition from the posterior of the shell to the ventral side is a circular arc without any angularity. The aperture is narrow-elliptical, open on the ventral side. The upper lip of the aperture is extended forming a cap-like structure. This cap-like structure extends several microns (mean=22 ��m) beyond the aperture and protrudes beyond the ventral surface of the shell terminating in a blunt lip. The height and the depth of the aperture are variable (from 10 to 38 ��m). Coefficients of variation (CV) of shell length and height are less than 10% (Table 1), and CV values for most characteristics are lower than 15%, thus P. wuchanica can be considered a sizemonomorphic species. Measurements. The shell is large, with a mean length of 123 �� 8.3 ��m, and mean width of 79 �� 9.5 ��m. The shell is widest towards the center of the shell (mean=79 ��m). Habitat. Soil of subtropical forest with dominated by Cinnamomum camphora (camphor tree) and the grass Deyeuxia langsdorffii. Etymology. The species name ��� wuchanica ��� is in reference to the region ���Wuchang��� in Wuhan City where the species was firstly observed. Type specimens. The holotype specimens of Planhoogenraadia wuchanica on which morphometric analyses were based are stored at China University of Geosciences, Wuhan, China (reference YJS17-1). Type locality. The type locality of the new species is surface soil in Cinnamomum camphora dominated subtopic forest in the Nanwangshan and Yujiashan mountains, both are near to Lake Donghu (Qin et al. 2013a) and adjacent to the campus of China University of Geosciences in Wuhan, central China. Ecology. Individuals described here were located in subtopical soils in forest dominated by Cinnamomum camphora and Deyeuxia langsdorffii. This habitat is similar to known habitats of other taxa in the genus Planhoogenraadia, which are abundant in subtropical and wet forest soils (Table 2). Geographical distribution. South central China., Published as part of Bobrov, Anatoly, Qin, Yangmin & Payne, Richard J., 2019, A new testate amoebae species Planhoogenraadia wuchanica sp. nov. from subtropical forest soils in Wuhan, central China, pp. 289-294 in Zootaxa 4550 (2) on pages 290-291, DOI: 10.11646/zootaxa.4550.2.9, http://zenodo.org/record/2625385, {"references":["Qin, Y., Fournier, B., Lara, E., Gu, Y., Wang, H., Cui, Y., Zhang, X. & Mitchell, E. A. D. (2013 a) Relationships between testate amoeba communities and water quality in Lake Donghu, a large alkaline lake in Wuhan, China. Frontiers of Earth Science, 7 (2), 182 - 190. https: // doi. org / 10.1007 / s 11707 - 013 - 0352 - 4"]}

C. angulata Playfair, 1917 Fig. 1 a Original description. Playfair 1917, P. 657, Table 38, Fig. 14. Description. Shell small, oval, transparent, lateral sides flattened, fundus rounded-conic, widest shell part in the middle, lateral sides converging at aperture. Shell surface smooth, without alien mineral particles. Aperture very small, circular. Measurements. Shell length 13���14 ��m, shell width 10 ��m. Habitat. Sphagnum mosses, wet green mosses, water plants, soil. Geographical distribution. Australia., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 293, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Playfair, G. I. (1917) Rhizopods of Sydney and Lismore. Proceedings of the Linnean Society of New South Wales, 42, 633 - 675. https: // doi. org / 10.5962 / bhl. part. 4865"]}

C. apiculata (Cash, 1904) Page, 1966 Fig. 1 g Difflugiella apiculata Cash, 1904 Original description. Cash 1904, P. 225, Table 21, Fig.7. Description. Shell ovoid, not compressed laterally, chitinous, smooth, transparent, colorless, without mineral particles, aperture circular. Cytoplasm colorless. Measurements. Shell length 40 ��m, shell width 28���30 ��m. Habitat. Freshwater, Sphagnum mosses, wet green mosses, on the surface of aquatic algae and plants. Geographical distribution. England, Russia, Germany, Romania., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 295, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Cash, J. (1904) On some new and little-know British freshwater Rhizopoda. Journal of the Linnean Society, 29, 218 - 225.","Page, F. C. (1966) Cryptodifflugia operculata n. sp. (Rhizopodea: Arcellinida, Cryptodifflugiidae) and the status of the genus Cryptodifflugia. Transactions of the American Microscopical Society, 85, 506 - 515."]}

C. splendida (Sch��nborn, 1965) Page, 1966 Figs 7 d, 7e Difflugiella splendida Sch��nborn, 1965 Original description. Sch��nborn 1965, P. 319, Fig. 3. Description. Shell ovoid in lateral view, transparent, yellow, shell surface deeply pitted. The aperture is circular. Measurements. Shell length 23.8���27.2 ��m, shell width 16.0���23.8 ��m, aperture diameter 5���6 ��m. Habitat. Lakes, in thickets of Typha. Geographic distribution. Poland, Germany., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 304, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Schonborn, W. (1965) Studien uber die Gattung Difflugiella Cash (Rhizopoda, Testacea). Limnologica, 3, 315 - 328.","Page, F. C. (1966) Cryptodifflugia operculata n. sp. (Rhizopodea: Arcellinida, Cryptodifflugiidae) and the status of the genus Cryptodifflugia. Transactions of the American Microscopical Society, 85, 506 - 515."]}

C. sacculus (Penard, 1902) Deflandre, 1953 Fig. 7 a Difflugiella sacculus Penard, 1902 Original description. Penard 1902, P. 429, Figs 1���6. Description. Shell elongated, oval-pyriform, with well expressed neck. Shell transparent, colorless or yellowish, usually with xenosomes or diatom frustules. Aperture circular. Measurements. Shell length 16���30 ��m, shell width 15���22 ��m, aperture diameter 4���5 ��m. Habitat. Freshwater, on water vegetation, submerged Sphagnum, wet green mosses, soils. Geographic distribution. Cosmopolitan., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 304, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Penard, E. (1902) Faune Rhizopodique du Bassin du Leman. Henry Kundig, Geneve, 714 pp.","Deflandre, G. (1953) Ordres des Testaceolobosa (de Saedeleer, 1934), Testaceafilosa (de Saedeleer, 1934), Thalamia (Haeckel, 1862) ou Thecamoebiens (Auct.) (Rhizopoda Testacea). In: Grasse, P. - P. (Ed.), Traite de Zoologie. Uol. 1. Masson and Co., Paris, pp. 97 - 148."]}

C. oviformis Penard, 1890 Figs 5 g, 5h, 5i, 5j, 5k Difflugiella oviformis in Bonnet et Thomas, 1955; Cryptodifflugia operculata Page, 1966 Original description. Penard 1890, P. 168, Table 7, Figs 95���107. Description. Shell colorless, oval, with smooth surface, the shell wall is composed of two layers, a thin outer covering of organic material and a thick inner layer of amorphous calcium phosphate, the aperture is terminal, circular and bordered by a small organic collar. Measurements. Shell length 13���26 ��m, shell width 8.0���20.7 ��m, diameter of aperture 3.0���6.9 ��m. Habitat. Freshwater sediments, Sphagnum mosses, wet green mosses, aquatic plants, acid soil. Geographical distribution. Cosmopolitan., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 301, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Penard, E. (1890) Etudes sur les Rhizopodes d'eau douce. Memoires de la Societe de Physique et d'Histoire Naturelle de Geneve, 31, 1 - 230.","Page, F. C. (1966) Cryptodifflugia operculata n. sp. (Rhizopodea: Arcellinida, Cryptodifflugiidae) and the status of the genus Cryptodifflugia. Transactions of the American Microscopical Society, 85, 506 - 515."]}

C. crenulata globosa Playfair, 1917 Fig. 4 c Difflugiella crenulata globosa Grospietsch, 1964 Original description. Playfair 1917, P. 658, Table 38, Fig. 19. Description. Shell differs from the typical form by the globose or subglobose shell shape; aperture occupies the entire lower surface. Measurements. Shell length 17���20 ��m, shell width 15���18 ��m. Habitats. In thickets of Typha in waterbodies. Geographical distribution. Australia, Poland, Germany, Greenland, Romania, Vietnam, South Georgia, Crozet and Possession Island., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 299, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Playfair, G. I. (1917) Rhizopods of Sydney and Lismore. Proceedings of the Linnean Society of New South Wales, 42, 633 - 675. https: // doi. org / 10.5962 / bhl. part. 4865","Grospietsch, Th. (1964) Die Gattungen Cryptodifflugia und Difflugiella (Rhizopoden Testacea). Zoologischer Anzeiger, 172, 243 - 257."]}

C. bassini Bobrov, 2001 Figs 1 h, 1i Original description. Bobrov 2001, P. 1012, Fig. 1. Description. Shell small, axially symmetrical, circular in transverse section, flattened in longitudinal section, widely elliptical. Aperture central, circular, wide, Apertural edge even, smooth, with weakly seen thickening. Shell chitinous, yellowish-brown. Shell surface smooth, without alien inclusions. Diameter/height ratio 1.88. Measurements. Shell diameter 15���23 ��m, shell height 8���12 ��m, aperture diameter 7���13 ��m. Habitat. Upper layer (0���5 cm) of Sphagnum quagmire, wet Sphagnum mosses. Geographical distribution. Russia, Japan., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 295, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Bobrov, A. A. (2001) Cryptodifflugia bassini - new species of sphagnobiontic testate amoebae (Protozoa, Testacea). Zoologicheskiy Zhurnal, 80, 1010 - 1013. [in Russian, with English summary]"]}

C. minuta (Playfair, 1917) comb. nov. Figs 5 e, 5f Difflugiella minuta Grospietsch, 1964 Original description. Playfair 1917, P. 656, Table 138, Fig. 12. Description. Shell small, ovate, circular in transverse section, rounded aborally, and with sides converging to a very narrow apertural part, aperture very narrow, often just a pore, with thickened rim, or sometimes with a very narrow but distinct collar, shell surface smooth. Measurements. Shell length 10���13 ��m, shell width 8���9 ��m, aperture diameter 2���3 ��m. Habitat. Freshwater, bogs. Geographical distribution. Australia, Russia, Crozet and Possession Island, Greenland, USA., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 301, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Playfair, G. I. (1917) Rhizopods of Sydney and Lismore. Proceedings of the Linnean Society of New South Wales, 42, 633 - 675. https: // doi. org / 10.5962 / bhl. part. 4865","Grospietsch, Th. (1964) Die Gattungen Cryptodifflugia und Difflugiella (Rhizopoden Testacea). Zoologischer Anzeiger, 172, 243 - 257."]}

C. sacculus sakotschawi Tarnogradsky, 1959 Figs 7 b, 7c Original description. Tarnogradsky 1959, P. 50, Table 8, Figs 64 a���e. Description. Shell is pyriform with a shorter neck comparing with typical form; covered by sand grains; completely circular at transverse section; the aperture is circular. Measurements. Shell length 27���30 ��m, shell width 18���20 ��m, aperture diameter 10.5���13.0 ��m. Habitat. Sphagnum lakes. Geographic distribution. Russia (Caucasus)., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 304, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Tarnogradsky, D. A. (1959) Microflora and microfauna of peats in the Caucasus. 8. A sedge-sphagnum lake in the upper reaches of the Balkarian river Terek: Raboty severo kavkazskoj Gidrobiologiceskoj Stantsii (Trudy Severo-osetinskogo Sel'skokhozyaistvennogo Instituta), 6, 3 - 59. [in Russian]"]}

Bobrov, Anatoly, Mazei, Yuri (2017): ANATOLY BOBROV & YURI MAZEI (2017) A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species. Zootaxa, 4282: 292-308. Zootaxa 4294 (5): 600-600, DOI: 10.11646/zootaxa.4294.5.9

C. leachi Nicholls, 2006 Fig. 5 d Original description. Nicholls 2006, P. 296, Figs 1, 2. Description. Shell oval elliptical, circular in transverse section, with smooth surface and very small aperture. Measurements. Shell length 10���16 ��m, shell width 8���12 ��m, aperture diameter 1.5���2.5 ��m. Habitat. Aquatic species living in bottom sediments. Geographical distribution. Canada., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 301, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Nicholls, K. H. (2006) Cryptodifflugia leachi n. sp., a minute new testate Rhizopod species (Rhizopoda: Phryganellina). Acta Protozoologica, 45, 295 - 299."]}

C. valida Playfair, 1917 Fig. 7 f Original description. Playfair 1917, P. 657, Plate 38, Fig. 16. Description. Shell large, ovoid, circular in transverse section; lateral sides gradually converging towards an aperture; aperture circular and rather broad, there is a well developed thickening around an aperture. Measurements. Shell length 55 ��m, shell width 40 ��m, aperture diameter 15 ��m. Habitat. Freshwater ponds, bogs. Geographic distribution. Australia, Chile., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 304, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Playfair, G. I. (1917) Rhizopods of Sydney and Lismore. Proceedings of the Linnean Society of New South Wales, 42, 633 - 675. https: // doi. org / 10.5962 / bhl. part. 4865"]}

C. pusilla Playfair, 1917 Fig. 6 i Difflugiella pusilla Grospietch, 1964 Original description. Playfair 1917, P. 658, Table 38, Fig. 20. Description. Shell small, subsquare (length equal to width), lateral sides almost vertical and parallel, base of fundus rounded. Shell smooth, firm, chitinoid, structureless, without xenosoms. Aperture circular, its diameter being almost equal to maximum shell width. Measurements. Shell length 10���22 ��m, shell width 10���20 ��m, aperture diameter���6���7 ��m. Habitat. Water vegetation, wet mosses on rocks. Geographical distribution. Cosmopolitan., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on pages 302-303, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Playfair, G. I. (1917) Rhizopods of Sydney and Lismore. Proceedings of the Linnean Society of New South Wales, 42, 633 - 675. https: // doi. org / 10.5962 / bhl. part. 4865","Grospietsch, Th. (1964) Die Gattungen Cryptodifflugia und Difflugiella (Rhizopoden Testacea). Zoologischer Anzeiger, 172, 243 - 257."]}

C. voigti Schmidt, 1926 Figs 7 g, 7h Difflugiella voigti Sch��nborn, 1965 Original description. Schmidt 1926, P. 223. Description. Shell narrowly ovoid; lateral sides gradually converging towards an aperture; shell circular in transverse section, with rare small xenosomes; colorless, brownish in old specimens, transparent; the aperture is circular. Measurements. Shell length 24���27 ��m, shell width 13���17 ��m, aperture diameter 5���6 ��m. Habitat. Oligotrophic lakes, Sphagnum. Geographic distribution. Germany, Russia, Belgium, Romania., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 306, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Schmidt, H. (1926) Untersuchungen an Rhizopoden aus Buchenhohlen. Uerhandlungen Naturhistorisch Uerein Rheinlande und Westfalien, 82, 218 - 226.","Schonborn, W. (1965) Studien uber die Gattung Difflugiella Cash (Rhizopoda, Testacea). Limnologica, 3, 315 - 328."]}

C. oviformis fusca (Penard, 1890) Bonnet et Thomas, 1956 Figs 6 a, 6b Original description. Penard 1890, P. 169, Table 7, Figs 100���107. Description. Differs from the typical form by yellowish-brown shell. Dimensions as in the typical form, with which it rather often co-occurs. The taxon is polymorphous in both size and shape; elongated specimens are frequently recorded. Measurements. Shell length 13���26 ��m, shell width 8���17 ��m, aperture diameter 3���6 ��m. Habitat. Freshwater sediments, Sphagnum mosses, wet green mosses, aquatic plants, acid soil. Geographical distribution. Cosmopolitan., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on pages 301-302, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Penard, E. (1890) Etudes sur les Rhizopodes d'eau douce. Memoires de la Societe de Physique et d'Histoire Naturelle de Geneve, 31, 1 - 230."]}

C. pusilla conica Playfair, 1917 Fig. 6 j Original description. Playfair 1917, P. 658, Table 38, Fig. 20. Description. Differs from the typical form in its more elongated shape. Shell conical or obtusely oval. Aboral region rounded. Apertural side equal to shell width. Measurements. Shell length 12 ��m, shell width 10 ��m. Habitat. On water vegetation. Geographic distribution. Australia., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on pages 303-304, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Playfair, G. I. (1917) Rhizopods of Sydney and Lismore. Proceedings of the Linnean Society of New South Wales, 42, 633 - 675. https: // doi. org / 10.5962 / bhl. part. 4865"]}

C. patinata (Sch��nborn, 1965) comb. nov. Figs 6 f, 6g Difflugiella patinata Sch��nborn, 1965 Original description. Sch��nborn 1965, P. 322���323, Fig. 5. Description. Shell bowl-shaped, with width exceeding length, transparent. Shell surface slightly corrugated, with isolated xenosomes. Color yellowish-brown to brown. The aperture is circular. Measurements. Shell length 8.5���12.9 ��m, shell width 11.5���14.0 ��m, aperture diameter 7.0���11.0 ��m. Habitat. On Typha and Phragmites australis in lakes and bogs, in lake sediments. Geographical distribution. Germany, Poland., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 302, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Schonborn, W. (1965) Studien uber die Gattung Difflugiella Cash (Rhizopoda, Testacea). Limnologica, 3, 315 - 328."]}

Cryptodifflugia Penard, 1890 Shell oval, egg-shaped, pyriform with a short neck, circular or oval cross-section, with adhering foreign particles or smooth surface, colorless, yellow or brown, composed of an outer proteinaceous material usually lined, aperture terminal, circular or oval. Pseudopods are in the form of ectoplasmic anastomosing reticulolobopods. Type species. Cryptodifflugia oviformis Penard, 1890. Ecology. Most of the species of the genus Cryptodifflugia are freshwater and dwell in lake sediments and on a surface of submerged water vegetation. They also can be found in various terrestrial biotopes such as Sphagnum mosses in wetlands, wet green mosses on soils and rocks, forest litter, sometimes in the rhizosphere. Few species inhabit interstitial spaces in marine sands (Golemansky 1970, 1979, 1981), i.e. Cryptodifflugia brevicolla, C. lanceolata, C. paludosa, C. psammophila. Most of the species are rarely detected in field samples. Few of them, namely C. compressa, C. crenulata, C. oviformis, C. oviformis f. fusca, C. sacculus are cosmopolitic and may form dominant set of communities. Geographical distribution. Species of the genus Cryptodifflugia are found in Nearctic, Palaearctic, Africotropical, Indomalayan, Australian, Neotropical, Oceania Realms, and particularly in Africa, Australia, Belgium, Bulgaria, Canada, Czech Republic, England, Holland, Hungary, Germany, Finland, France, India, Ireland, Italy, Poland, Russia, Spain, Switzerland, Japan, Sumatra, USA, Vietnam., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 293, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Penard, E. (1890) Etudes sur les Rhizopodes d'eau douce. Memoires de la Societe de Physique et d'Histoire Naturelle de Geneve, 31, 1 - 230.","Golemansky, V. (1970) Contribution a la connaissance des thec-amoebiens (Rhizopoda, Testacea) des eaux souterraines littorales du Golf de Gdansk (Pologne). Academie Bulgare des Sciences, Bulletin de l'Institut de Zoologie (Sofia), 32, 77 - 87.","Golemansky, V. (1979) Thecamoebiens psammobiontes du supralittoral vietnamien de la Mer Chinoise et description de Cryptodifflugia brevicolla sp. n. (Rhizopoda: Arcellinida). Acta Protozoologica, 18, 285 - 292","Golemansky, V. (1981) Descrption de trois thecamoebiens (Protozoa: Rhizopodea) nouveaux des eaux souterraines littorales des mers. Acta Protozoologica, 20, 115 - 119."]}

C. compressa ovata Playfair, 1917 Fig. 3 l Original description. Playfair 1917, P. 656, Table 38, Fig. 11. Description. Shell differs from the typical form by more elongated and widely ovate shell and by the absence of organic lip around an aperture. Measurements. Shell length 19 ��m, shell width 17���18 ��m. Habitats. Aquatic plants and wetlands. Geographical distribution. Australia., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 298, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Playfair, G. I. (1917) Rhizopods of Sydney and Lismore. Proceedings of the Linnean Society of New South Wales, 42, 633 - 675. https: // doi. org / 10.5962 / bhl. part. 4865"]}

C. paludosa Golemansky, 1981 Figs 6 c, 6d, 6e Original description. Golemansky 1981, P. 117, Figs 3 a���c. Description. Shell elongated-ovate, slightly narrowed at aperture and rounded in posterior part. Transverse section oval. The aperture somewhat oval, sometimes almost circular. Shell chitinous and transparent, often with siliceous xenosomes around an aperture. Measurements. Shell length 32���45 ��m, shell width 20���32 ��m, shell depth 14���18, aperture size 10���15 x 8���13 ��m. Habitat. Sandy littoral, coarse sand (0.31���1.0 mm), salinity of groundwater varying from 0.69��� to 16.26���, maximum depth of record in sand��� 120 cm. Geographical distribution. Black Sea., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 302, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Golemansky, V. (1981) Descrption de trois thecamoebiens (Protozoa: Rhizopodea) nouveaux des eaux souterraines littorales des mers. Acta Protozoologica, 20, 115 - 119."]}

С. vulgaris (Franc��, 1913) Volz, 1928 Fig. 7 i Difflugiella vulgaris Franc��, 1913 Original description. Franc��, 1913, P. 352, Fig.1. Description. Shell globose or somewhat oval, rather thick-walled, transparent, structureless. One end with very small circular aperture surrounded by thickened wall. Sometimes there occur yellowish and brownish to darkbrown specimens. Measurements. Shell length 15���18 ��m, shell width 10���21 ��m, aperture diameter 3.8���4.5 ��m. Habitat. Soils, common in forest litter, sometimes in rhizosphere, once recorded in Sphagnum. Geographical distribution. Germany, Bulgaria. Russia. Several taxa with generic names Cryptodifflugia and Difflugiella were not described above by following reasons: 1. The descriptions of Difflugiella heynigi Sch��nborn, 1965 and Cryptodifflugia lamingerae Chardez, 1977 do not correspond to the diagnosis of the genus Cryptodifflugia. Both taxa are considerably larger and are characterized by apiculate aboral end of the shell as well as by prominent long neck with collar. Most likely both species might be included in the genus Chardezia. 2. The names Cryptodifflugia sakotschawi and Cryptodifflugia kelensis were mentioned by Tarnogradsky (1945, 1945a), however, their descriptions and figures have never been published. 3. Cryptodifflugia turfacea Zacharias, 1903 and C. vanhoornei Beyens et Chardez, 1987 are characterized by retort-shaped shell. We consider this character as important to make a taxonomic decision on transferring these species to another genus., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 306, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["France, R. H. (1913) Das Edaphon, Untersuchungen zur Oekologie der bodenbewohnenden Mikroorganismen. Arbeiten aus dem Biologischen Institut Munchen, 2, 1 - 99.","Schonborn, W. (1965) Studien uber die Gattung Difflugiella Cash (Rhizopoda, Testacea). Limnologica, 3, 315 - 328."]}

C. angusta (Sch��nborn, 1965) Page, 1966 Figs 1 b, 1c, 1d Difflugiella angusta Sch��nborn, 1965 Original description. Sch��nborn 1965, P. 234, Fig. 7. Description. Shell small, organic, elongated-ovate, not transparent, yellow-brown, covered with rare mineral particles. Apical region can be slightly elongated in lateral view. Aperture circular, very small. Measurements. Shell length 17.0���20.4 ��m, shell width 11.9���13.6 ��m, aperture diameter 2.7���3.8 ��m. Habitat. Freshwater, recorded on Typha. Geographical distribution. Bulgaria, Poland, Germany., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on pages 293-294, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Schonborn, W. (1965) Studien uber die Gattung Difflugiella Cash (Rhizopoda, Testacea). Limnologica, 3, 315 - 328.","Page, F. C. (1966) Cryptodifflugia operculata n. sp. (Rhizopodea: Arcellinida, Cryptodifflugiidae) and the status of the genus Cryptodifflugia. Transactions of the American Microscopical Society, 85, 506 - 515."]}

C. horrida Page, 1966 Figs 4 d, 4e, 4f Difflugiella horrida Sch��nborn, 1965 Original description. Page 1966, P. 323, Fig. 9. Description. Shell small, with length only slightly exceeding width, almost cylindrical, with broad aperture occupying almost entire lower side of the shell, shell surface covered by rare sand grains. Measurements. Shell length 13���17 ��m, shell width 12���15 ��m, aperture diameter 8���11 ��m. Habitat. In thickets of Typha in waterbodies. Geographical distribution. Bulgaria, Germany, Poland, Czech Republic, Spitsbergen, Vietnam., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 299, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Page, F. C. (1966) Cryptodifflugia operculata n. sp. (Rhizopodea: Arcellinida, Cryptodifflugiidae) and the status of the genus Cryptodifflugia. Transactions of the American Microscopical Society, 85, 506 - 515.","Schonborn, W. (1965) Studien uber die Gattung Difflugiella Cash (Rhizopoda, Testacea). Limnologica, 3, 315 - 328."]}

C. crenulata glabra (Sch��nborn, 1965) comb. nov. Fig. 4 b Difflugiella crenulata glabra Sch��nborn, 1965 Original description. Sch��nborn 1965, P. 318, Fig. 1 m. Description. Shell differs from the typical form by the absence of excavations on the shell. Measurements. Shell length 15 ��m, shell width 11���14 ��m, aperture diameter 4 ��m. Habitats. Freshwater, recorded on Typha. Geographical distribution. Germany, Poland., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 298, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Schonborn, W. (1965) Studien uber die Gattung Difflugiella Cash (Rhizopoda, Testacea). Limnologica, 3, 315 - 328."]}

C. compressa Penard, 1902 Figs 3 a, 3b, 3c, 3d, 3e, 3f Original description. Penard 1902, P. 428, Figs 1���3. Description. Shell small, ovate or widely elliptical, yellowish-brown, transparent, laterally compressed, elliptical in transverse section, surface smooth, without mineral inclusions, aperture circular or elliptical, very small, surrounded by an organic lip. Measurements. Shell length 13���21 ��m, shell width 9���21 ��m. Habitat. Freshwater, Sphagnum mosses, soil. Geographical distribution. Cosmopolitan., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on pages 296-297, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Penard, E. (1902) Faune Rhizopodique du Bassin du Leman. Henry Kundig, Geneve, 714 pp."]}

C. brevicolla Golemansky, 1979 Figs 2 a, 2b, 2c Original description. Golemansky 1979, P. 287���2888, Fig. 3. Description. Shell ovate, laterally compressed, with clearly expressed chitinous collar around an aperture, neck circular in transverse section, fundus elliptical in transverse section, colorless and transparent. Aperture circular surrounded by small transparent chitinous collar. Measurements. Shell height 14���18 ��m, shell width 12���15 ��m, shell depth 5���11 ��m, aperture diameter 4���7 ��m. Habitat. Marine sandy beach, psammal supralittoral. Geographical distribution. Vietnam., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 295, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Golemansky, V. (1979) Thecamoebiens psammobiontes du supralittoral vietnamien de la Mer Chinoise et description de Cryptodifflugia brevicolla sp. n. (Rhizopoda: Arcellinida). Acta Protozoologica, 18, 285 - 292"]}

C. compressa angustioris Tarnogradsky, 1959 Figs 3 g, 3h Original description. Tarnogradsky 1959. P. 50, Table. 8, Figs 62 a���g. Description. Shell differs from the typical form by a more elongated shell with oval aperture, laterally compressed, golden-brown. Measurements. Shell length 19���20 ��m, shell width 15���17 ��m. Habitat. In Sphagnum. Geographical distribution. Russia (Caucasus), Belgium, Germany, Spitsbergen., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on pages 297-298, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Tarnogradsky, D. A. (1959) Microflora and microfauna of peats in the Caucasus. 8. A sedge-sphagnum lake in the upper reaches of the Balkarian river Terek: Raboty severo kavkazskoj Gidrobiologiceskoj Stantsii (Trudy Severo-osetinskogo Sel'skokhozyaistvennogo Instituta), 6, 3 - 59. [in Russian]"]}

C. psammophila (Golemansky, 1970) comb. nov. Fig. 6 h Difflugiella psammophila Golemansky, 1970 Original description. Golemansky 1970, P. 367, Fig. 13. Description. Shell small, pyriform, pointed aborally, oval in transverse section, transparent, colorless, covered with rare sand grains. The aperture is circular. Measurements. Shell length 20���24 ��m, shell width 12���14 ��m, aperture diameter 4���5 ��m. Habitat. Marine psammon. Geographical distribution. Baltic Sea, Black Sea, Mediterranean Sea, Caribbean Sea, Atlantic Ocean, Pacific Ocean., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 302, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Golemansky, V. (1970) Contribution a la connaissance des thec-amoebiens (Rhizopoda, Testacea) des eaux souterraines littorales du Golf de Gdansk (Pologne). Academie Bulgare des Sciences, Bulletin de l'Institut de Zoologie (Sofia), 32, 77 - 87."]}

C. lanceolata Golemansky, 1970 Figs 5 a, 5b, 5c Original description. Golemansky 1970, P. 366���367, Fig. 14. Description. Shell with even outline, elongated-ovate, distinctly lanceolate or sagittate, compressed, colorless, sometimes light-brown, transverse section elliptical, aperture circular. Measurements. Shell length 18���25, shell width 10���18, shell depth 9���10, aperture width 3���8 ��m. Habitat. Supralittoral zone of marine beaches. Geographical distribution. Cosmopolitan., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on pages 300-301, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Golemansky, V. (1970) Contribution a la connaissance des thec-amoebiens (Rhizopoda, Testacea) des eaux souterraines littorales du Golf de Gdansk (Pologne). Academie Bulgare des Sciences, Bulletin de l'Institut de Zoologie (Sofia), 32, 77 - 87."]}

C. compressa australis Playfair, 1917 Figs 3 i, 3j, 3k Original description. Playfair 1917, P. 656, Table 28, Fig. 10. Description. Shell compressed, oval, differs from the typical form by shell width slightly exceeding its length, shell surface smooth, without mineral inclusions. Measurements. Shell length 16���19 ��m, shell width 18���21 ��m. Habitats. Aquatic plants and wetlands. Geographical distribution. Australia., Published as part of Bobrov, Anatoly & Mazei, Yuri, 2017, A review of testate amoeba genus Cryptodifflugia Penard, 1890 (Phryganellina: Cryptodifflugiidae) with a key to species, pp. 292-308 in Zootaxa 4282 (2) on page 298, DOI: 10.11646/zootaxa.4282.2.4, http://zenodo.org/record/818668, {"references":["Playfair, G. I. (1917) Rhizopods of Sydney and Lismore. Proceedings of the Linnean Society of New South Wales, 42, 633 - 675. https: // doi. org / 10.5962 / bhl. part. 4865"]}