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More than two hundred and seventy specimens belonging to seven neopteran orders were collected, primarily from the upper part of the Xinzhuangcun Formation. Hemiptera, Hymenoptera, and Diptera have become more diverse groups in the Early Paleocene. The environment and climate in this period are putatively reconstructed.

Genus Bathya gen. nov. urn:lsid:zoobank.org:act: AA9C504C-CE7E-426A-A988-27098BD64D25 Type species Bathya brevicarpus gen. et sp. nov. Diagnosis Antennae calceoli absent. Antenna 1 longer than antenna 2; accessory flagellum absent. Mandible molar triturative, columnar; palp 3-articulate, extremely elongated, article 3 longer than article 2. Maxilla 1 inner plate bearing one apical seta; palp article 1 shorter than article 2. Maxilla 2 inner plate without oblique setal row. Maxilliped outer plate not reaching end margin of palp article 2. Gnathopod 1 similar in shape to gnathopod 2, slightly smaller than gnathopod 2; subchelate; carpus much shorter than propodus; with posterior lobe. Coxae 5���6 bilobate, posterior lobe larger than anterior lobe; coxa 7 rounded. Pereopod 5 slightly longer than pereopod 7; anterior margin of propodus with bifid robust setae; dactylus simple, with small nail. Epimerons 2���3 posterior margin smooth, posteroventral corner of epimeron 2 subacute. Uropods 1���2 inner ramus longer than outer ramus, both inner and outer ramus with marginal robust setae. Uropod 3 inner ramus about twice longer than outer ramus, both inner and outer ramus with marginal robust setae, without simple or plumose setae. Telson entire, linguiform, longer than broad. Etymology The generic name Bathya refers to the type species designated herein that was collected from bathyal waters. Distribution North-west Pacific, Okinawa Trough, the hydrothermal vents at a depth of 996.9 m. Remarks Actually, it is a little questionable that Bathya gen. nov. is placed under the Calliopiidae G.O. Sars, 1893 for having the pereopod 5 longer than pereopod 7. The phylogenetic study by Lowry & Myers (2013) based on morphology analyzed showed that the Calliopiidae and Pontogeneiidae Stebbing, 1906 cluster together and form a clade with Hornelliidae d���Udekem d���Acoz, 2010 and Cheirocratidae d���Udekem d���Acoz, 2010. The new genus is not listed under Cheirocratidae or Hornelliidae, which are also not having antennae calceoli, for having the following characteristics: the inner plate of maxilla 1 only bearing apical seta, maxilla 2 without oblique setal row, the rami of uropod 3 unequal in length, and the entire telson. The new genus is not suited to be placed in Pontogeneiidae for the propodus of gnathopod 2 having robust setae along the palmar margin. Moreover, Sanchoidae Lowry, 2006, which are known as endemic to Australia and associated with sponges (Lowry & Barnard 2001), have been listed under the Calliopiidae. However, the present genus cannot be incorporated in this family for the lack of a nonrecessed head and a dorsoventrally flattened urosome (Lowry 2006). Hence, it is more reasonable that this new genus is to be placed under Calliopiidae with an emendation of the diagnosis of this family. Besides having the pereopod 5 longer than pereopod 7, Bathya gen. nov. can be distinguished its congeners of the Calliopiidae by having the combination of the following characters: eyes present but not well pigmented; antenna 1 longer than antenna 2; the absence of an accessory flagellum; the inner plate of maxilla 1 only bearing one apical seta; maxilla 2 without oblique setal row; gnathopod 1 similar in shape and size to gnathopod 2; pleonites 1���3 without dorsal carinae; the rami of uropod 3 unequal in length; the entire telson., Published as part of Wang, Yan-Rong, Zhu, Chao-Dong, Sha, Zhong-Li & Ren, Xian-Qiu, 2020, Bathya brevicarpus gen. et sp. nov. (Amphipoda: Senticaudata: Calliopiidae), from hydrothermal vents, Okinawa Trough, North-west Pacific, pp. 1-12 in European Journal of Taxonomy 693 on pages 3-4, DOI: 10.5852/ejt.2020.693, http://zenodo.org/record/3973339, {"references":["Lowry J. K. & Myers A. A. 2013. A phylogeny and classification of the Senticaudata subord. nov. (Crustacea: Amphipoda). Zootaxa 3610 (1): 1 - 80. https: // doi. org / 10.11646 / zootaxa. 3610.1.1","d'Udekem d'Acoz C. 2010. Contribution to the knowledge of European Liljeborgiidae (Crustacea, Amphipoda), with considerations on the family and its affinities. Bulletin de l'Institut royal des Sciences naturelles de Belgique, Biologie 80: 127 - 259.","Lowry J. K. 2006. New families and subfamilies of Amphipod Crustaceans. Zootaxa 1254: 1 - 28.","Lowry J. K. & Barnard J. L. 2001. Revision of the endemic Australian genus Sancho (Amphipoda, Eusiridae). Journal of Crustacean Biology 21 (1): 231 - 242. https: // doi. org / 10.1651 / 0278 - 0372 (2001) 021 [0231: ROTEAG] 2.0. CO; 2"]}

Bathya brevicarpus gen. et sp. nov. urn:lsid:zoobank.org:act: 2A8520B1-C0C6-4BAB-9C8D-A7DFB57B111D Figs 1���2 Diagnosis As for the genus. Etymology The new species name contains the Latin ��� brev ��� (= short), referring to the carpus of the gnathopods 1 and 2 being shorter than the propodus. Material examined Holotype NORTH-WEST PACIFIC ��� ♂, 5.6 mm, dissected; Okinawa Trough; depth 996.9 m; 17 Apr. 2014; RY0108, ROV-4; MBM 286556. Description BODY. Dorsally smooth. HEAD. Nearly subequal in length to pereonites 1 and 2 combined, rostrum small, anterior lobe rounded, lower margin with large and acute projecting tooth anterodistally; eyes present, but not pigmented, hardly visible in ethanol material. ANTENNA. Antenna 1 longer than antenna 2; peduncular article 1 wider and longer than article 2; article 2 less than twice longer than article 3; article 3 not produced apicoventrally; primary flagellum 23-articulate, few very thin and short setae scattered along flagellum; accessory flagellum absent. Antenna 2 slender than antenna 1, peduncular article 5 distinctly longer than article 4; flagellum longer than peduncle, 28-articulate. MOUTH PARTS. Upper lip and lower lip broken. Mandible symmetrical, with incisor dentate, bearing 7 teeth; lacinia mobilis dentate, with 8 teeth; with 12 accessory spines; molar well developed, columnar, triturative; palp elongate, slender, 3-articulate, article 3 longer than article 2, ventral face bearing short stout setae. Maxilla 1 with inner plate bearing one apical stout seta; palp 2-articulate, article 2 longer than article 1, bearing 6 small robust and three long simple setae. Maxilla 2 inner plate slightly narrower than outer, only bearing sparse slender subapical marginal setae, without oblique row of slender setae. GNATHOPODS. Coxae 1���4 longer than broad, coxa 4 broader than coxae 1���3. Gnathopod 1 subchelate, slightly smaller than gnathopod 2; coxa weakly produced anteroventrally; merus subrectangular, bearing row of slender setae along distal margin; carpus shorter than propodus, cup-shaped, with dense long slender setae on posterior margin; propodus suboval, palm acute, posterior margin with robust and short simple setae; dactylus evenly tapering, with acute tip. Gnathopod 2 similar in shape to ganthopod 1; coxa subrectangular, subequal in length to coxa 1, anterior margin slightly convex; carpus distinctly shorter than propodus, weakly lobed; propodus with tooth-like protruded sub-distally, bearing short simple and robust setae along posterior margin; dactylus with acute tip, evenly tapering. PEREOPODS. Pereopod 3 (distal three articles broken in holotype) slender, merus bearing large produced lobe anterodistally. Pereopod 4 similar to pereopod 3, but coxa much broader. Pereopod 5 slightly longer than pereopod 7, coxa bilobate, anterior lobe smaller than posterior lobe; merus broader than distal three articles, with posterodistal strongly produced as lobe, anterior margin with 4+ groups of 2���3 robust setae; propodus 1.4 times longer than carpus, anterior margin bearing 8 groups of 2���3 bifid robust setae; dactylus slender, with acute tip, evenly tapering, 0.7 length of propodus, with small nail. Pereopod 6 (distal three articles broken in holotype) gill smaller than that of pereopod 5; coxa bilobate, anterior lobe much smaller than posterior lobe; basis slight longer than that of pereopod 5. Pereopod 7 coxa unilobate, rounded; basis broader than that of pereopods 5 and 6, anterior margin bearing robust setae; propodus subequal in length to carpus; dactylus half-length of propodus, with small acute nail. GILLS. Present on coxae 2���6, small, not pleated. EPIMERAL PLATES 1 AND 3. Without tooth on posterior margin, postero-corner of epimeral 2 being subacute. UROPODS. Uropod 1 overreaching distal end of uropod 2, without interramal spur; peduncle shorter than rami, with 19 marginal and one large distal robust setae; outer ramus shorter than inner ramus, but subequal in broad to inner, with 9 marginal and three distal robust setae; inner ramus with 14 marginal and 3 distal robust setae. Uropod 2 peduncle distinctly shorter than rami, with 5 marginal and two distal robust setae; outer ramus 0.6 times shorter than inner ramus, with 10 marginal and three distal robust setae; inner ramus with 15 marginal and three distal robust setae. Uropod 3 shorter than uropod 2, peduncle shorter than rami, with one robust seta distally; outer ramus 0.55 times shorter than inner ramus, with 7 marginal robust setae; inner ramus with 15 marginal robust setae. TELSON. Entire, longer than broad (length 1.7 times as long as width at base), distal margin convex., Published as part of Wang, Yan-Rong, Zhu, Chao-Dong, Sha, Zhong-Li & Ren, Xian-Qiu, 2020, Bathya brevicarpus gen. et sp. nov. (Amphipoda: Senticaudata: Calliopiidae), from hydrothermal vents, Okinawa Trough, North-west Pacific, pp. 1-12 in European Journal of Taxonomy 693 on pages 4-7, DOI: 10.5852/ejt.2020.693, http://zenodo.org/record/3973339

Identification key to genera of the Calliopiidae Key based on original or amended descriptions of genera and adapted from previous keys given by Barnard (1964), Barnard & Karaman (1991) and Bousfield & Hendrycks (1997). All genera included in this key are according to Lowry & Myers (2013) and WoRMS (2020). 1. Mandibular molar not triturative, usually conical............................................................................ 2 ��� Mandibular molar triturative, columnar, rather conical.................................................................... 3 2. Carpus of gnathopods 1���2 shorter than propodus, weakly lobed; antenna 2 elongate...................................................................................................................................... Harpinioides Stebbing, 1888 ��� Carpus of gnathopods 1���2 as long as propodus, unlobed; antenna 1 elongate................................................................................................................................................. Calliopiurus Bushueva, 1986 3. Inner plate of maxilla 2 much broader than outer plate.................... Pontogeneoides Nicholls, 1938 ��� Inner plate of maxilla 2 not much broader than outer plate.............................................................. 4 4. Coxae very short and progressively longer towards coxa 7............................................................. 5 ��� Coxae not as greatly shortened and not progressively lengthened towards coxa 7.......................... 6 5. Carpus and propodus of pereopods 6���7 extremely elongate (planktonic); body carinate; coxa 1 not or scarcely produced anteriorly........................... Stenopleuroides Birstein & M. Vinogradov, 1964 ��� Carpus and propodus of pereopods 6���7 not extremely elongate; body smooth; coxa 1 produced anteriorly................................................................................................. Stenopleura Stebbing, 1888 6. Palp of maxilla 1 reduced, not exceeding apex of outer plate, article 1 longer than article 2...................................................................................................................................... Laothoes Boeck, 1871 ��� Palp of maxilla 1 ordinary, article 1 shorter than article 2................................................................ 7 7. Rami of uropods 1���2 without marginal robust setae, only with distal robust setae...................................................................................................................................... Calliopiella Schellenberg, 1925 ��� Rami of uropods 1���2 with both marginal and distal robust setae..................................................... 8 8. Gnathopods 2 very slender, linear, carpus very slender and elongate, unlobed, propodus generally elongate and linear (except in Amphithopsis)................................................................................... 9 ��� Gnathopod 2 not very slender nor linear nor greatly elongate (propodus not especially elongate)............................................................................................................................................................. 18 9. Gnathopod 1 ordinary, neither linear nor elongate......................................................................... 10 ��� Gnathopod 1 linear, elongate.......................................................................................................... 12 10. Propodus of gnathopod 2 not linear; dactylus of pereopods 3���7 serrated............................................................................................................................................................ Amphithopsis Boeck, 1861 ��� Propodus of gnathopod 2 linear; dactylus of pereopod 3���7 not serrated........................................11 11. Accessory flagellum absent; lower lip with inner lobe absent.............. Bouvierella Chevreux, 1900 ��� Accessory flagellum present; lower lip with inner lobe present................... Oradarea Walker, 1903 12. Dactylus of pereopods 3���7 with one or more superior robust setae............. Cleippides Boeck, 1871 ��� Dactylus of pereopods 3���7 without superior robust setae.............................................................. 13 13. Carpus of gnathopods 1���2 much longer than propodus................................................................. 16 ��� Carpus of gnathopods 1���2 scarcely longer and usually shorter than propodus.............................. 14 14. Gnathopod 2 much longer than gnathopod 1, carpus and propodus extremely slender like that of pereopod 3���7................................................................................... Leptamphopus G.O. Sars, 1893 ��� Gnathopod 2 as long as or slightly longer than ganthopod 1, carpus and propodus normal.......... 15 15. Telson entire, linguiform.................................................... Membrilopus Barnard & Karaman, 1987 ��� Telson with shallow apical notch on distal margin.................... Frigora Ren in Ren & Huang, 1991 16. Antennae calceolate; antenna 1, peduncular article 3 with posterodistal process; uropod3, rami margin only with simple setae....................................................................... Halirages Boeck, 1871 ��� Antennae usually lacking calceoli; antenna 1, peduncular article 3 unmodified; uropod 3, margins with robust setae and inner marginal setae only............................................................................. 17 17. Propodus of gnathopods expanded; pereopods 5���7 elongated........... Haliragoides G.O. Sars, 1893 ��� Propodus of gnathopods not expanded; pereopods 5���7 normal, not extremely elongated....................................................................................................................................... Apherusa Walker, 1891 18. Peduncular article 3 of antenna 1 produced apicoventrally............................................................ 19 ��� Peduncular article 3 of antenna 1 not or weakly produced apicoventrally..................................... 21 19. Carpus on either of gnathopods 1���2 much shorter than propodus................................................. 20 ��� Carpus on either of gnathopods 1���2 scarcely shorter than or longer than propodus............................................................................................................................................... Lopyastis Thurston, 1974 20. Carpus of gnathopods not lobate................................................................ Tylosapis Thurston, 1974 ��� Carpus of gnathopods strongly lobate..................................................... Calliopius Lilljeborg, 1865 21. Epimeron 3 serrate.......................................................................................................................... 22 ��� Epimeron 3 smooth......................................................................................................................... 23 22. Accessory flagellum well developed, 3+ articulate............................... Weygrechita Stuxberg, 1880 ��� Accessory flagellum scale-like............................................................... Oligochinus Barnard, 1969 23. Rostrum small................................................................................................................................. 24 ��� Rostrum large.................................................................................................................................. 27 24. Accessory flagellum absent............................................................................................................ 25 ��� Accessory flagellum 1-articulate, scale-like........ Paracalliopiella Tzvetkova & Kudrjaschov, 1975 25. Gnathopod 1 larger in size than gnathopod 2.................... Whangarusa Barnard & Karaman, 1987 ��� Gnathopod 1 similar in size to gnathopod 2................................................................................... 26 26. Carpus of gnathopods 1���2 much shorter than propodus; outer ramus of uropod 3 �� length of inner ramus; telson longer than broad, entire.................................................................... Bathya gen. nov. ��� Carpus of gnathopods 1���2 subequal to propodus; rami of uropod 3 subequal in length; telson broader than long, emarginated............................................... Lutriwita Lowry & Myers, 2012 (fresh water) 27. Dactylus of pereopods 3���7 bifid...................................... Manerogeneia Barnard & Karaman, 1987 ��� Dactylus of pereopods 3���7 pectinate......................................... Metaleptamphopus Chevreux, 1911, Published as part of Wang, Yan-Rong, Zhu, Chao-Dong, Sha, Zhong-Li & Ren, Xian-Qiu, 2020, Bathya brevicarpus gen. et sp. nov. (Amphipoda: Senticaudata: Calliopiidae), from hydrothermal vents, Okinawa Trough, North-west Pacific, pp. 1-12 in European Journal of Taxonomy 693 on pages 8-10, DOI: 10.5852/ejt.2020.693, http://zenodo.org/record/3973339, {"references":["Barnard J. L. 1964. Revision of some families, genera and species of Gammaridean Amphipoda. Crustaceana 7 (1): 49 - 74. https: // doi. org / 10.1163 / 156854064 X 00263","Barnard J. L. & Karaman G. S. 1991. The families and genera of marine gammaridean Amphipoda (except marine gammaroids). Records of the Australian Museum Supplement 13 (1 & 2): 1 - 866. Part 1: https: // doi. org / 10.3853 / j. 0812 - 7387.13.1991.91 Part 2: https: // doi. org / 10.3853 / j. 0812 - 7387.13.1991.367","Bousfield E. L. & Hendrycks E. A. 1997. The amphipod superfamily Eusiroidea in the North American Pacific Region. II. Family Calliopiidae. Systematics and distributional ecology. Amphipacifica 2 (3): 3 - 66.","Lowry J. K. & Myers A. A. 2013. A phylogeny and classification of the Senticaudata subord. nov. (Crustacea: Amphipoda). Zootaxa 3610 (1): 1 - 80. https: // doi. org / 10.11646 / zootaxa. 3610.1.1","Ren X. & Huang L. 1991. Studies on gammaridea and caprellidea (Crustacea: Amphipoda) from the northwest waters off the Antarctic Peninsula. Studia Marina Sinica 32: 185 - 323. [in Chinese.]","Lowry J. K. & Myers A. A. 2012. New, mainly southern hemisphere, freshwater families of Amphipoda (Crustacea), together with a description of the first freshwater calliopiid, Lutriwita bradburyi gen. nov. et sp. nov. Zootaxa 3499: 27 - 45. https: // doi. org / 10.11646 / zootaxa. 3499.1.2"]}

Genus Probathylepas gen. nov. Type species: Probathylepas faxian sp. nov. Diagnosis. As for the family.

Key to recent families of Order Scalpelliformes 1. Number of capitular plates 6���8, without whorls of imbricating plates............................................. 2 - Number of capitular plates 8 or more, usually with whorls of imbricating plates.................................... 3 2. Number of capitular plate 8, base of peduncle with calcareous plate..................................... Lithotryidae - Number of capitular plates 6���8, base of peduncle without calcareous plate............................... Eolepadidae 3. Peduncle naked................................................................. Probathylepadidae fam. nov. - Peduncle generally furnished with definite scales............................................................ 4 4. Male with distinct capitulum and peduncle......................................................... Calanticidae - Male without distinct capitulum and peduncle............................................................... 5 5. Number of capitular plates more than 18.......................................................... Pollicipidae - Number of capitular plates less than 18........................................................... Scalpellidae, Published as part of Ren, Xian-Qiu & Sha, Zhong-Li, 2015, Probathylepadidae, a new family of Scalpelliformes (Thoracica: Cirripedia: Crustacea), for Probathylepas faxian gen. nov., sp. nov., from a hydrothermal vent in the Okinawa Trough, pp. 144-150 in Zootaxa 4033 (1) on pages 145-146, DOI: 10.11646/zootaxa.4033.1.9, http://zenodo.org/record/242718

Ren, Xian-Qiu, Sha, Zhong-Li (2015): Probathylepadidae, a new family of Scalpelliformes (Thoracica: Cirripedia: Crustacea), for Probathylepas faxian gen. nov., sp. nov., from a hydrothermal vent in the Okinawa Trough. Zootaxa 4033 (1): 144-150, DOI: http://dx.doi.org/10.11646/zootaxa.4033.1.9

Family Probathylepadidae fam. nov. Diagnosis. Capitulum with 30 plates, including 8 primary plates (rostrum, carina, paired scuta, terga and latera) and 2 distinct whorls of supplementary imbricating plates, each whorl with 11 plates. Peduncle smooth, shorter than capitulum, without scales. Cirrus II shorter than remaining cirri, anterior ramus shorter, thicker than posterior ramus, posterior ramus long, fine; basal part of cirrus VI without caudal appendage. Remarks. Although only a single specimen was collected, it is reasonably recognizable as a new family due to its obvious morphological differences from other known scalpelliforms. Probathylepadidae fam. nov. is similar to other recent scalpelliform families, such as the Calanticidae Zevina, 1978 and the Lithotryidae Gruvel, 1905, but its naked peduncle and its capitulum with two whorls of 22 supplementary imbricating plates easily distinguishes it. Although Smilium zancleanum (Seguenza, 1876) also has a peduncle without scales, its capitulum bears 10 primary plates and supplementary imbricating plates are lacking (Zevina 1981). The scalpelliform family Eolepadidae is only found in hydrothermal vent areas. The new family differs from the Eolepadidae by the capitulum having imbricating supplementary plates and the naked peduncle; by the anterior ramus of cirrus II being thicker and shorter than the posterior ramus; and each of the intermediate segments of cirri III���VI having 2���3 pairs setae only; and by the lack of caudal appendages associated with the basal part of cirrus VI (Newman 1979; Jones 1993; Buckeridge 2000, 2009; Southward & Jones 2003; Yamaguchi et al. 2004; Southward 2005). The new specimen occurred at a hydrothermal vent together with the sessile Neoverruca intermedia Sha & Ren, 2015, a primitive living member of the suborder Verrucomorpha of the order Sessilia. Some characters of the new family are similar to Neoverruca Schumacher, 1817. For example, the inner surface of the scutum has a longitudinal ridge, and there are similarities of the soft body, mouth, cirri, etc. The new family is also similar to another member of the Sessilia, the primitive living Neobrachylepas relica Newman & Yamaguchi, 1995, of the suborder Brachylepadomorph (Newman & Yamaguchi, 1995). For example, the capitulum bears paired scuta, terga and latera, a single rostrum and carina plus whorls of small imbricating supplementary plates, and there are similarities of the soft body, mouth, morphology of cirri I and II, etc. The relationship between the new family and the Verrucomorpha and the Brachylepadomorpha appears to be very close and thus the systematic position and evolutionary position of the new family may have important significance (Newman & Yamaguchi 1995). However, phylogenetic relationships between major lineages of the Thoracica can only be further discussed when additional specimens of the new family are found and evidence from their molecular analysis considered. Etymology. The name of the new family: Pro from the Latin prefix for former and bathy referring to deep waters, in combination with Lepas., Published as part of Ren, Xian-Qiu & Sha, Zhong-Li, 2015, Probathylepadidae, a new family of Scalpelliformes (Thoracica: Cirripedia: Crustacea), for Probathylepas faxian gen. nov., sp. nov., from a hydrothermal vent in the Okinawa Trough, pp. 144-150 in Zootaxa 4033 (1) on page 145, DOI: 10.11646/zootaxa.4033.1.9, http://zenodo.org/record/242718, {"references":["Zevina, G. B. (1981) Barnacles of the Suborder Lepadomorpha (Cirripedia, Thoracica) of the world Ocean Part 1: Family Scalpellidae. Guides to the Fauna of the U. S. S. R. 127. Zoological Institute of the Academy of Sciences of the U. S. S. R., Leningrad, 406 pp.","Newman, W. A. (1979) A new scalpellid (Cirripedia), a mesozoic relic living near an abyssal hydrothermal spring. Transactions of the San Diego Society of Natural History, 19 (11), 153 - 167.","Jones, D. S. (1993) A new Neolepas (Cirripedia: Thoracica, Scalpellidae) from an abyssal hydrothermal vent, Southeast Pacific. Bulletin of Marine Science, 52 (3), 937 - 948.","Buckeridge, J. S. (2000) Neolepas osheai sp. nov., a new deep-sea vent barnacle (Cirripedia: Pedunculata) from the Brothers Caldera, south-west Pacific Ocean. New Zealand Journal of Marine and Freshwater Research, 34, 409 - 418. http: // dx. doi. org / 10.1080 / 00288330.2000.9516944","Buckeridge, J. S. (2009) Ashinkailepas kermadecensis, a new species of deep-sea scalpelliform barnacle (Thoracica: Eolepadidae) from the Kermadec Islands, southwest Pacific. Zootaxa, 2021, 57 - 65.","Southward, A. J. & Jones, D. S. (2003) A revision of stalked barnacles (Cirripedia: Thoracica: Scalpellomorpha: Eolepadidae: Neolepadinae) associated with hydrothermalism, including a description of a new genus and species from a volcanic seamount off Papua New Guinea. Senckenbergiana maritima, 32 (1 / 2), 77 - 93. http: // dx. doi. org / 10.1007 / BF 03043086","Yamaguchi, T., Newman, W. A. & Hashimoto, J. (2004) A cold seep barnacle (Cirripedia: Neolepadinae) from Japan and the vent / seep fauna. Journal of the Marine Biological Association of the UK, 84, 111 - 120. http: // dx. doi. org / 10.1017 / S 0025315404008975 h","Southward, A. J. (2005) Systematics and ecology of a new species of stalked barnacle (Cirripedia: Thoracica: Scalpellomorpha: Eolepadidae: Neolepadini) from the Pacific Antarctic Ridge at 38 ° S. Senckenbergiana maritima, 35, 147 - 156. http: // dx. doi. org / 10.1007 / BF 03043683","Sha, Z. L. & Ren, X. Q. (2015) A new species of genus Neoverruca (Cirripedia, Thoracica, Verrucidea, Neoverrucidae) from a hydrothermal vent area in Okinawa Trough. Crustaceana, 88 (9), 991 - 1001.","Newman, W. A. & Yamaguchi, T. (1995) A new sessile barnacle (Cirripedia, Brachylepadomorpha) from the Lau Back-Arc Basin, Tonga; first record of a living representative since the Miocene. Bulletin National Museum of Natural History, Series 4, 17 A, 221 - 243. [Paris]"]}

Sinoscalpellum sinensis sp. nov. (Figure 1) Holotype K120110-3. Capitulum: length 7.6 mm, width 3.8 mm. Peduncle: length 1.2 mm, width 0.8 mm. Attached on sediment grain. Agassiz trawl. Collected from South China Sea, St.MBMCAS007, 17��15.0209 ��� N, 112��20.1947 ��� E. 13 September 2011. Depth 1238 m. Xu Kui-Dong, Zhang Jun-Long and Ning Ping Coll. Diagnosis Female, capitulum large, shuttle-shaped, 14 calcified plates fully covered, white, membranous interspace narrow, growth lines indistinct. Scutum larger, irregular rectangular, growth line weak, umbo apical, slightly covered tergum, rostral margin arched, rostral part of tergal margin slightly concave, lateral margin slightly arched. Tergum large, triangular, umbo apical, rostral margin straight, carinal margin slightly median concave, scutal margin nearly straight. Carina arched, dorsal surface smooth, longitudinal hollow absent or indistinct, umbo apical. Upper latus rectangular, scutal margin straight, umbo on sub-medial of scutal margin, tergal and carinal margins straight, median of basal margin slightly concave. Carinal latus rectangular, narrow and long, ratio of long and wide about 14:5, umbo at basi-carinal angle, two lateral plates intersecting each other on dorsal surface, upper carinal angle slightly acute, basi-rostral angle acute and reaching low-rostral angle of inframedian latus. Rostral latus triangular, rectangular in ventral view; scutal margin longer than basimargin, at upper part of protuberances of inframedian latus, umbo at upper rostral angle. Inframedian latus narrow and long, funnel-shape, rostral margin slightly concave, carinal margin longest, slightly arched, scutal margin straight, tergal margin straight and short, umbo at basi-rostral angle, as acute angle below rostral latus and protruded beyond rostral latus. Rostrum small, round triangular, between umbos of two rostral latera. Peduncle shorter than capitulum, with transverse scales; attached to sediment grain. Dorsal surface of prosoma smooth. Labrum bullate, crest with a row of small teeth. Mandible with three teeth, inferior angle pectinate. Cutting edge of maxilla I with a notch and setae, with three large spines above and four spines below. Maxilla II with distinct notch on frontal portion, with setae, maxillar lobe slender and long. Palp small, conical, with setae. Numbers of segments of cirri I��� VI of holotype as follows: I II III IV V VI zfflffl}|fflffl{zfflffl}|fflffl{zfflffl}|fflffl{zfflffl}|fflffl{zfflffl}|fflffl{zfflffl}|fflffl{ 10 12 17 18 17 18 18 18 19 18 18 17 Anterior ramus of cirrus I shorter than posterior. Anterior and posterior rami of II���VI sub-equal in length, slender and long, each of intermediate segments bears four or five pairs of setae on anterior margin, dorsal margin of segments with small teeth. Caudal appendage slender, five segments, with setae. Penis absent. Dwarf male not known. Etymology The sinensis is from Latin for Chinese. Habitat Based on this record, the new species, which has not yet been found elsewhere in tropical deep seas, should be attached to sediment grains., Published as part of Xian-Qiu, Ren & Zhong-Li, Sha, 2014, Description of a new genus and species of the subfamily Arcoscalpellinae Zevina, 1978 (Cirripedia: Thoracica: Scalpellidae) from deep waters of the South China Sea, pp. 1055-1060 in Journal of Natural History 48 (17) on pages 1057-1059, DOI: 10.1080/00222933.2013.841300, http://zenodo.org/record/4006735

Diagnosis Capitulum with 14 calcified plates, fully covered, narrow membranous interspace between plates. Carina arched, umbo apical; upper latus rectangular, umbo at submedial of scutal margin, inframedian latus narrow and long, umbo at basi-rostral angle, protruded to below rostrum. Peduncle short, with transverse scales. Type species Sinoscalpellum sinensis sp. nov. Etymology Sino - from Latin for China, in combination with Scalpellum. Remarks The subfamily Arcoscalpellinae is composed of 13 genera. The characters of the new species do not allow it to be accommodated within known genera, so we erected a new genus to accommodate it. The new genus is similar to the genus Planoscalpellum Zevina by the umbo of the upper latus at the sub-medial of scutal margin. The new genus is similar to the genus Verum Zevina by having the following characteristics: apex of carinal latus not extending beyond carinal margin and inframedian latus triangular, umbo basal. But it differs from these by the inframedian latus narrow and long, umbo at basi-rostral angle and protruded to below rostrum. There is only one species in the genus: Sinoscalpellum sinensis sp. nov. Key to genera of the subfamily 1. Peduncle long and slender, about twice length of capitulum.................................................................................. Vertebroscalpellum Newman & Ross Peduncle shorter than length of capitulum............................................... 2 2. Inframedian latus narrow and long, umbo at basi-rostral angle, protruded to below rostrum................................................... Sinoscalpellum gen. nov. Umbo of inframedian latus not at basi-rostral angle and not protruded to below rostrum........................................................................................... 3 3. Umbo of upper latus at sub-medial of carinal margin of scutum............................................................................................... Planoscalpellum Zevina Umbo of upper latus at apical or sub-apical............................................ 4 4. Inframedian latus broad, with four to six sides........................................ 5 Inframedian latus triangular or baciliform............................................... 6 5. Carinal latus horny projected........................................ Tarasovium Zevina Carinal latus not horny projected.................................. Welmerium Zevina 6. Umbo of inframedian latus basal or sub-basal......................................... 7 Umbo of inframedian latus sub-medial or apical and sub-apical............. 8 7. Umbo of carinal latus beyond carinal margin..... Pilsbryiscalpellum Zevina Umbo of carinal latus not beyond carinal margin................. Verum Zevina 8. Umbo of inframedian latus sub-medial......................... Catherinum Zevina Umbo of inframedian latus apical or sub-apical...................................... 9 9. Umbo of carinal latus protruded at carinal margin................................ 10 Umbo of carinal latus not protruded at carinal margin......................... 11 10. Carinal latus horny, umbo basi-carinal end........... Diceroscalpellum Zevina Carinal latus not horny, umbo at median part of carinal margin............................................................................................. Anguloscalpellum Zevina 11. Apex of inframedian latus not reach the margin of upper latus............................................................................................... Amigdoscalpellum Zevina Apex of inframedian latus reach the upper latus.................................... 12 12. Umbo of carinal latus apex.............................. Trianguloscalpellum Zevina Umbo of carinal latus not at apex.......................................................... 13 13. Umbo of carinal latus at middle of the carinal margin.... Arcoscalpellum Hoek Umbo of carinal latus at basi-carinal angle............. Teloscalpellum Zevina, Published as part of Xian-Qiu, Ren & Zhong-Li, Sha, 2014, Description of a new genus and species of the subfamily Arcoscalpellinae Zevina, 1978 (Cirripedia: Thoracica: Scalpellidae) from deep waters of the South China Sea, pp. 1055-1060 in Journal of Natural History 48 (17) on pages 1056-1057, DOI: 10.1080/00222933.2013.841300, http://zenodo.org/record/4006735

Subfamily Kamakinae Myers & Lowry, 2003, Published as part of Ren, Xian-Qiu & Sha, Zhong-Li, 2013, Two new species and one newly recorded species of the genus Kamaka (Crustacea: Amphipoda) from the Hainan Province, South China Sea, pp. 391-399 in Zootaxa 3630 (2) on page 392, DOI: 10.11646/zootaxa.3630.2.14, http://zenodo.org/record/217000

Order Amphipoda Latreille, 1816, Published as part of Ren, Xian-Qiu & Sha, Zhong-Li, 2013, Two new species and one newly recorded species of the genus Kamaka (Crustacea: Amphipoda) from the Hainan Province, South China Sea, pp. 391-399 in Zootaxa 3630 (2) on page 392, DOI: 10.11646/zootaxa.3630.2.14, http://zenodo.org/record/217000

Ren, Xian-Qiu, Sha, Zhong-Li (2013): Two new species and one newly recorded species of the genus Kamaka (Crustacea: Amphipoda) from the Hainan Province, South China Sea. Zootaxa 3630 (2): 391-399, DOI: http://dx.doi.org/10.11646/zootaxa.3630.2.14

Family Kamakidae Myers and Lowry, 2003, Published as part of Ren, Xian-Qiu & Sha, Zhong-Li, 2013, Two new species and one newly recorded species of the genus Kamaka (Crustacea: Amphipoda) from the Hainan Province, South China Sea, pp. 391-399 in Zootaxa 3630 (2) on page 392, DOI: 10.11646/zootaxa.3630.2.14, http://zenodo.org/record/217000

Genus Kamaka Dershavin, 1923, Published as part of Ren, Xian-Qiu & Sha, Zhong-Li, 2013, Two new species and one newly recorded species of the genus Kamaka (Crustacea: Amphipoda) from the Hainan Province, South China Sea, pp. 391-399 in Zootaxa 3630 (2) on page 392, DOI: 10.11646/zootaxa.3630.2.14, http://zenodo.org/record/217000