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Crossodonthina clavata sp. nov. Figures1, 3���10, Tables 1���3 Type material. Holotype: Female, China, Guangdong, Nanling National Forest Park (It is named as ��� Mangshan National Nature Reserve ��� in Hunan Province), coordinates: 24.927170N, 112.983979E, alt. 1645m, in forest, leg. Ji- Gang Jiang, Yu-Yao Zhao, Fang-Jun Chen. 7.iv.2018 (J2018040707). Paratypes: one male, Hunan, Yizhang County, Mangshan National Nature Reserve, in decayed leaves near the entrance of Jiangjunzhai. leg. Ji-Gang Jiang, Yu- Yao Zhao, Fang-Jun Chen. 6.iv.2018 (J2018040602) (24.956291N, 112.955372E, alt. 1230m); one male and one female, ibid, in bamboo forest on the sides of highway at Tiantaishan, leg. Ji-Gang Jiang, Yu-Yao Zhao, Fang-Jun Chen. 8.iv.2018 (J2018040806) (24.967959N, 112.957361E, alt. 1069m); three females, ibid, in decayed leaves on the side of highway to Xiangsikeng, leg. Ji-Gang Jiang, Yu-Yao Zhao, Fang-Jun Chen. 7.iv.2018 (J2018040706) (24.953868N, 112.974373E, alt. 1290m); one female, ibid, in decayed leaves on the side of road at Houwangzhai, leg. Ji-Gang Jiang, Yu-Yao Zhao, Fang-Jun Chen. 7.iv.2018 (J2018040702) (24.981000N, 112.886172E, alt. 650 m); one male, ibid, in decayed leaves of bamboo on the side of highway at Zeziping, leg. Ji-Gang Jiang, Yu-Yao Zhao, Fang-Jun Chen. 7.iv.2018 (J2018040709) (24.944149N, 112.980348E, alt. 1506m). Type materials are housed in the Key Laboratory of Zoology, Hunan University of Arts and Science (HUAS), Changde, Hunan Province, China. Etymology. The name of the species derives from its clavate macrochaetae on terga. Diagnosis. Three uncolored eyes per side on head; cephalic chaeta O present; body tubercles well differentiated; cephalic tubercles Dl, L and So fused each other; mandible with 4 basal teeth and five fringed rami; maxilla with two lamellae and each lamella with two teeth; labral chaetotaxy as 0/2, 2. Description. Body length: holotype 2.5mm, paratypes 1.5���2.6 mm. Color: red while living and white in alcohol (Fig. 1). Chaetal morphology. Dorsal ordinary chaetae of five types. Long macrochaetae (Ml) weakly serrated and clavated (Figs 3, 8). Short macrochaetae (Mc) morphologically similar to Ml, usually smooth, shorter than Ml. Very short macrochaetae (Mcc) morphologically similar to and shorter than Mc. Mesochaetae (me) similar to ventral chaetae, thin, smooth, and pointed, various in length (Fig. 10). Microchaetae (mi) similar to mesochaetae and about half the length of the shortest mesochaetae (chaetae Oca, Di2). S-chaetae (s) on terga thin, smooth, usually shorter than or equal to Mc (Fig. 3). Head. Eyes 3+3, uncolored, isolated from each other, two on anterior and one on posterior part of tubercle Oc, the anterior two eyes not included in the tubercle. Antenna 4-segmented (Fig. 4). Ant. I with 9 chaetae. Ant. II with 11 Chaetae. Ant. III dorsally fused to Ant. IV. Guard chaeta sgd of Ant. III slightly migrated distally, two rods exposed in separate pits. Ant. IV dorsally with 8 subequal, slightly thickened and blunt sensilla (S1���8), apical bulb trilobed, organite (or) present. Ventral chaetotaxy of Ant. IV: ap with 5 bs and 9 miA, ca with 1 bs and 6 miA, cm with 1 bs and 9 miA, cp with 16 miA (Fig. 5). On ventral side of Ant. III, Vi, Vc, Ve with 2, 3, 5 chaetae respectively (Fig. 5). Buccal cone developed, labrum truncated, chaetal formula as 0/2, 2 (Fig. 9). Labium with 11 chaetae, without papillae x. Mandible hypertrophied and complex (Fig. 6), consisting of 5 fringed rami, 4 teeth and some spine-like chaetae. Three of the 5 rami short, fringed, each ramus with long filaments, the other 2 rami long, developed, with marginal filaments, the 2 long rami about 10 times as long as the shortest one. Maxilla consisting of two lamellae, each lamella with 2 minute apical teeth, without marginal filaments (Fig. 7). Dorsal tubercles and chaetotaxy of head as in Table 1. and Fig. 3. Dorsal central area with 6 tubercles: 1 tubercle Cl, 2 tubercles Oc, 1 tubercle Fr and 2 tubercles An, the tubercle Fr and 2 An stand closely each other. Dorsal posterior area with 4 separate tubercles: 2 Di and 2 De, microchaetae Di2 and De2 free from tubercle Di and De. Line of chaetae Di1���De1 crosses line of Di2���De2 on head (cross-type) (Deharveng 1983). Tubercles Dl, L and So on dorsal lateral area fused each other. Ventral chaetotaxy of head. Group Vi with 5 chaetae, groups Vea, Vem and Vep with 4, 3 and 2 chaetae respectively. Thorax (Table 2 & Fig. 3). Th. I with 3+3 tubercles, Di, De, Dl with 1, 2, 1 chaetae respectively. Th. II with 4+4 tubercles, sensory microchaeta (ms) present on tubercle Dl. Th. III with 4+4 tubercles. Chaetotaxy of thorax and legs as in Table 2. Unguis with a basal inner tooth, without unguiculus. Tibiotarsus with chaeta M. Abdomen (Table 2 & Fig. 3). Abd. I���III respectively with 4+4 tubercles, tubercle Di, De, Dl and L with 2, 3(2+s), 2, 4 chaetae respectively. Abd. IV with 4+4 tubercles too, tubercle Di with 2 chaetae, tubercle De with 3(2+s) chaetae, tubercle Dl with 3 chaetae, tubercle L with 7 chaetae (6+s). Abd. V dorsally with 3+3 tubercles, two tubercles Di separated, tubercle De usually separate from Dl, rarely De fuse to Dl. Abd. VI with 1 tubercle on each side. VT with 4+4 chaetae. Furcular remnant with 4 (3���5) chaetae (Fig. 10). Ecology. The new species inhabits the litter of the studied forests. Remarks. Till now, 13 species of genus Crossodonthina have been reported worldwide, 12 species from Asia and only one from Oceania (Jiang & Zhang 2012, Hu et al., 2019). Four of these have 2+2 eyes, and the other 9 species have 3+3 eyes. Crossodonthina clavata sp. nov. is the tenth one with 3+3 eyes. In general appearance, Crossodonthina clavata sp. nov. is close to C. choui Jiang & Zhang, 2012 in the presence of chaeta O on tubercle Fr, having 4 chaetae on VT, the presence of S chaetae on tubercle L of Abd. IV and having 2 chaetae on each tubercle Di of Th. II��� Abd. IV. However, C. clavata sp. nov. can be distinguished from the latter by differences in the arrangement of cephalic tubercles and body chaetotaxy. The former has fused tubercles on head, tubercles Dl, L and So fused each other, and has 4 chaetae (3+s) on tubercle De of Th. II, versus having separated tubercles on head, tubercle Dl separated from tubercles L and So, and having 5 chaetae (4+s) on tubercle De of Th. II in the latter. The new species is also similar to C. tridentiens Yue & Yin, 1999 from Shanghai in macrochaetae on terga sheathed, blunt and serrated; tubercle Di on Th. II���Abd. IV well defined; tubercle Oc with 3 chaetae; tubercle Di, De, Dl on Th. I with 1, 2, 1 chaetae respectively; cephalic tubercle Dl fused to L and So; tubercle De on Th. II with 4 (3+s) chaetae. However, the former can be differentiated from the latter by having 4 basal teeth and 5 rami on mandible, 2 lamellae on maxilla, 1 microchaeta, 1 mesochaeta and 1 macrochaeta on tubercle Oc, 4 (sometimes 3 or 5) chaetae on furcular remnant, versus 3 basal teeth and 4 rami on mandible, 3 lamellae on maxilla, 2 short macrochaetae and 1 long macrochaeta on tubercle Oc, 3 chaetae on furcular remnant. The new species has a unique mandible morphology with 4 basal teeth and 5 rami, that different from all known species of the genus., Published as part of Jiang, Ji-Gang & Wang, Qing-Yun, 2021, New species of Crossodonthina from Mangshan National Nature Reserve (Nanling National Forest Park), China (Collembola: Neanuridae), pp. 587-599 in Zootaxa 5071 (4) on pages 588-594, DOI: 10.11646/zootaxa.5071.4.7, http://zenodo.org/record/5726552, {"references":["Deharveng, L. (1983) Morphologie evolutive des Collemboles Neanurinae en particulier de la lignee Neanurinae. Travaux de Laboratoire d'Ecobiologie des Arthropodes Edaphiques, Toulouse, 4, 1 - 63.","Hu, Y. H., Jiang, C. & Jiang, J. G. (2019) Two new species of Lobellini from Central-South China (Collembola: Neanuridae). Zootaxa, 4712 (1), 77 - 89. https: // doi. org / 10.11646 / zootaxa. 4712.1.5","Yue, Q. Y. & Yin, W. Y. (1999) Two new species of Collembola (Arthropleona: Neanuridae, Pseudachorutidae) from Shanghai, China. Acta Entomologica Sinica, 6 (3), 222 - 226. https: // doi. org / 10.1111 / j. 1744 - 7917.1999. tb 00115. x"]}

Crossodonthina acuminata sp. nov. Figures 2, 11���17, Tables 4���6 Type material. Holotype: Female, China, Hunan, Yizhang County, Mangshan National Nature Reserve. Coordinates: 24.967959N, 112.957361E, alt. 1070m, on the highway side at Tiantaishan, in forest of bamboo, leg. Ji- Gang Jiang, Yu-Yao Zhao, Fang-Jun Chen, 8.iv.2018 (J2018040806). Paratypes: 4 females, Hunan, Yizhang County, on the road sides near the waterfall at Jiangjunzhai, leg. Ji-Gang Jiang, Yu-Yao Zhao, Fang-Jun Chen, 7.iv.2018 (J2018040711) (24.954720N, 112.923782E, alt. 1121m); one female, ibid, Mangshan National Nature Reserve, near the entrance of Jiangjunzhai, in decayed leaves, leg. Ji-Gang Jiang, Yu-Yao Zhao, Fang-Jun Chen, 6.iv.2018 (J2018040602) (24.956291N, 112.955372E, alt. 1230m); one female, ibid, Mangshan National Nature Reserve, in a pit on the sides of highway near the hydropower station, in decayed leaves, leg. Ji-Gang Jiang, Yu-Yao Zhao, Fang- Jun Chen, 7.iv.2018 (J2018040704) (24.977702N, 112.939269E, alt. 930m). Type materials are housed in the Key Laboratory of Zoology, Hunan University of Arts and Science (HUAS), Changde, Hunan Province, China. Etymology. The name of the species derives from its acuminate body macrochaetae. Diagnosis. Three black eyes per side on head; all cephalic tubercles independent; chaeta O on tubercle Fr present; cephalic tubercle Di, De on posterior area of head with 2 chaetae each, arranged as intermediate between cross and non-cross type; mandible with 3 teeth and 8 rami; tubercle De of Th. I with 3 chaetae; furcular remnant without any chaeta. Description. Body length: holotype, female, 2.6mm; paratypes, females, 2.6���3.8mm. Body color: red while living and white in alcohol (Fig. 2). Chaetal morphology. Body dorsal side with four types of ordinary chaetae: long macrochaetae (Ml), short macrochaetae (Mc), very short macrochaetae (Mcc) and mesochaetae (me). All chaetae thin, smooth and pointed. S-chaetae (s) on terga smooth, thinner than ordinary chaetae, and equal to Ml in length. Head (Table 4, Fig. 11). Eyes 3+3, black. Antenna 4-segmented. Ant. I with 10 chaetae. Ant. II with 11 chaetae. Two guard chaetae sgd and sgv present dorsally and ventrally on Ant. III respectively. Two short rods exposed in separate pits. Dorsally, 8 subequal, thickened and curved sensilla present on Ant. IV, apical bulb trilobed, organite (or) present (Fig. 14). Ventral chaetotaxy of Ant. IV: ap with 7 bs and 2 miA, ca with 2 bs and 1 miA, cm with 4 bs and without miA, and cp with 7 miA (Fig. 15). On ventral side of Ant. III, Vi, Vc, Ve respectively with 2, 4, 3 chaetae (Fig. 15). TABLE 4. Cephalic tubercles and chaetotaxy of C. acuminata sp. nov. TubercleNumber and type of chaetaeCl2 Ml2 Mc (orme)An1 Ml1 Mc2 meFr2 Mc 1 meOc1 Ml 2 meDi1 Ml1meDe1 Ml1 meDl1 Ml+3 meL1 Ml+1 meSo1 Ml+7 meAn1 Ml1 Mc2 meFr2 Mc 1 meOc1 Ml 2 meDi1 Ml1meDe1 Ml1 meDl1 Ml+3 meL1 Ml+1 meSo1 Ml+7 me2 meFr2 Mc 1 meOc1 Ml 2 meDi1 Ml1meDe1 Ml1 meDl1 Ml+3 meL1 Ml+1 meSo1 Ml+7 meDe1 Ml1 meDl1 Ml+3 meL1 Ml+1 meSo1 Ml+7 meDl1 Ml+3 meL1 Ml+1 meSo1 Ml+7 me Buccal cone developed, labrum truncated, labrum chaetae formula as 0/2, 2. Mandible with three basal teeth, five long rami and three short rami (Fig. 16). Maxilla with three lamellae, the longest lamella bifurcated, with filaments on the edge of the big ramus; the middle lamella with two teeth; the shortest lamella with only one pointed tooth (Fig. 17). Labium with 11 chaetae and no papillae x. Dorsal chaetotaxy of head as in Table 4 and Fig. 11. Tubercles Cl, An, Fr and Oc on dorsal central area independent from each other. Dorsal posterior area with 4 separate tubercles: 2 Di and 2 De, its chaetotaxy arranged as intermediate between cross and non-cross type (Deharveng 1983). Dorsal lateral area with 3 separated tubercles: Dl, L and So, each tubercle L with 2 chaetae. Ventral chaetotaxy of head. Group Vi with 6 chaetae, groups Vea, Vem and Vep with 4, 4 and 3 chaetae respectively. Thorax (Table 5 & Fig. 12). Th. I with 3+3 tubercles: Di with 1 chaeta, De with 3 (or 2) chaetae, Dl with 2 chaetae. Th. II and Th. III respectively with 4+4 tubercles. Tubercle Dl of Th. II with 5 chaetae (including the microsensilla). Chaetotaxy of thorax and legs as in Table 5. Unguis with a basal inner tooth, unguiculus absent. Chaeta M present on tibiotarsus. Abdomen (Table 5 & Fig. 12). Abd. I���IV respectively with 4+4 tubercles, tubercle L of Abd. I with 5���7 chaetae (4���6+s), tubercle L of Abd. II with 6���8 chaetae (5���7+s), tubercle L of Abd. III with 8���9 chaetae (7���8+s), tubercle L of Abd. IV with 8 chaetae, without sensory chaeta. Abd. V dorsally with 3+3 tubercles, two tubercles Di separate from each other, tubercle De separate from Dl, tubercle L with 3���4 chaetae. Abd. VI with 1 tubercle on each side. Ventral tube with 4+4 chaetae (Fig. 13). Furcular remnant without chaeta. Ecology. The new species was found only in the litter of studied forests. Remarks. The new species can be differentiated from all known species of genus Crossodonthina by the following character combination: all cephalic tubercles independent, cephalic tubercle Di, De with 2 chaetae each, arranged as intermediate between cross and non-cross type chaetotaxy on posterior area of head, mandible with 3 teeth, five long rami and three short rami. Maxilla with 3 lamellae. Tubercle De and Dl of Th. I with 3(2) and 2 chaetae respectively, furcular remnant without chaeta, tubercle L of Abd. I���III with a sensory chaeta each. Crossodonthina acuminata sp. nov. is the eleventh species with 3+3 eyes in the genus Crossodonthina. The new species is similar to C. formosana Yosii, 1965 from Taiwan in macrochaetae on terga smooth and pointed, tubercle Di on Th. II���Abd. III present, maxilla with 3 lamellae, Ant. IV with trilobed apical bulb, ventral tube with 4+4 chaetae. However, the former can be differentiated from the latter by having separated tubercle Dl, L and So on head, 8 rami and 3 teeth on mandible, 3 (2) chaetae on tubercle De of Th. I and no chaeta on Fu, versus having fused tubercle Dl+L+So on head, 4 rami and 1 big tooth on mandible, 1 chaeta on tubercle De of Th. I and 3 chaetae on Fu. C. acuminata sp. nov. also resembles C. nipponica Yosii, 1954 from Japan by the following characters: macrochaetae on terga smooth and pointed, cephalic tubercles Dl, L and So independent, mandible with 3 basal teeth and claw with an inner tooth. However, the former can be differentiated from the latter by having well defined tubercle Di on Th. II���Abd. IV, 8 rami on mandible, 2 chaetae on tubercle Dl of Th. I and no chaeta on Fu, versus having obscure tubercle Di on Th. II���Abd. IV, 2 rami on mandible, 1 chaeta on tubercle Dl of Th. I and 3 chaetae on Fu. In the genus Crossodonthina, C. altamontana Yoshii, 1981 has no chaetae on Fu, that is similar to C. acuminata sp. nov. However, the new species can be differentiated from the former by having 3 chaetae on tubercle Oc, separated tubercle Dl, L and So on cephalic lateral area, chaeta O present on tubercle Fr, versus 2 chaetae on tubercle Oc, fused tubercle Dl, L and So on cephalic lateral area, chaeta O absent on tubercle Fr. Furthermore, C. clavata sp. nov. and C. acuminata sp. nov. can be discriminated from each other and From known species with 3 eyes by the key provided below., Published as part of Jiang, Ji-Gang & Wang, Qing-Yun, 2021, New species of Crossodonthina from Mangshan National Nature Reserve (Nanling National Forest Park), China (Collembola: Neanuridae), pp. 587-599 in Zootaxa 5071 (4) on pages 594-598, DOI: 10.11646/zootaxa.5071.4.7, http://zenodo.org/record/5726552, {"references":["Deharveng, L. (1983) Morphologie evolutive des Collemboles Neanurinae en particulier de la lignee Neanurinae. Travaux de Laboratoire d'Ecobiologie des Arthropodes Edaphiques, Toulouse, 4, 1 - 63.","Yosii, R. (1965) On some Collembola of Japan and adjacent countries. Contributions from the Biological Laboratory Kyoto University, 19, 1 - 71.","Yosii, R. (1954) Springschwanze des Oze-Naturschutzgebietes. Scientific Researches of the Ozegahara Moor, 1954, 777 - 830.","Yoshii, R. (1981) Entomological Report from the Sabah Forest Research Centre. Japan International Cooperation Agency, 3 - 4, 1 - 68."]}

Key to Crossodonthina with 3+3 eyes 1 Macrochaetae on terga smooth and pointed................................................................ 2 - Macrochaetae on terga sheathed and blunt, or serrated........................................................ 5 2 Tubercle Di on Th. II���Abd. IV reduced, represented by some chaetae........................................... 3 - Tubercle Di on Th. II���Abd. IV well defined................................................................ 4 3 Cephalic tubercle Dl, L and So separated, tubercle De on Th. II with 1 chaetae................. C. nipponica Yosii, 1954 - Cephalic tubercle Dl, L and So fused, tubercle De on Th. II with 2 chaetae................ C. koreana Yosii & Lee, 1963 4 Cephalic tubercle Dl, L and So fused, mandible with 1 basal tooth.......................... C. formosana Yosii, 1965 - Cephalic tubercle Dl, L and So independent, mandible with 3 basal tooth........................ C. acuminata sp. nov. 5 Tubercle Di on Th. II���Abd. IV reduced, represented by some chaetae, no chaetae present on furcular remnant........................................................................................... altamontana Yoshii, 1981 - Tubercle Di on Th. II���Abd. IV well defined, at least 2 chaetae present on furcular remnant........................... 6 6 Tubercle Oc with 2 chaetae, tubercle Di, De, Dl on Th. I with 3, 2, 3 chaetae respectively......... C. radiata Salmon, 1941 - Tubercle Oc with 3 chaetae, tubercle Di, De, Dl on Th. I with 1, 2, 1 chaetae respectively............................ 7 7 Cephalic tubercle Dl separate from L and So, tubercle De on Th. II with 5 (4+s) chaetae............................. 8 - Cephalic tubercle Dl fused to L and So, tubercle De on Th. II with 4 (3+s) chaetae................................ 10 8 Cephalic tubercle L separate from So, mandible with 2 basal teeth......................... C. alatoserrata Yosii, 1965 - Cephalic tubercle L fused to So, mandible with at least 3 basal teeth............................................. 9 9 Mandible with 3 rami and five fine basal teeth........................... C. tiantongshana Xiong, Chen & Ying, 2005 - Mandible with 5 rami and 3 big basal teeth......................................... C. choui Jiang & Zhang, 2012 10 Cephalic tubercle Oc with 2 short macrochaetae and 1 long macrochaeta, mandible with 3 basal teeth and 4 rami, maxilla with 3 lamellae and one of them fringed............................................... C. tridentiens Yue & Yin, 1999 - Cephalic tubercle Oc with 1 microchaeta, 1 mesochaeta and 1 macrochaeta, mandible with 4 basal teeth and 5 rami, maxilla with 2 lamellae and none of them fringed................................................... C. clavata sp. nov., Published as part of Jiang, Ji-Gang & Wang, Qing-Yun, 2021, New species of Crossodonthina from Mangshan National Nature Reserve (Nanling National Forest Park), China (Collembola: Neanuridae), pp. 587-599 in Zootaxa 5071 (4) on page 598, DOI: 10.11646/zootaxa.5071.4.7, http://zenodo.org/record/5726552, {"references":["Yosii, R. (1954) Springschwanze des Oze-Naturschutzgebietes. Scientific Researches of the Ozegahara Moor, 1954, 777 - 830.","Yosii, R. & Lee, C. E. (1963) On some Collembola of Korea, with notes on the genus Ptenothrix. Contributions from the Biological Laboratory Kyoto University, 15, 1 - 37.","Yosii, R. (1965) On some Collembola of Japan and adjacent countries. Contributions from the Biological Laboratory Kyoto University, 19, 1 - 71.","Yoshii, R. (1981) Entomological Report from the Sabah Forest Research Centre. Japan International Cooperation Agency, 3 - 4, 1 - 68.","Salmon, J. (1941) The Collembolan Fauna of New Zealand, including a discussion of its distribution and affinites. Transactions of the Royal Society of New Zealand, 70, 282 - 431.","Yue, Q. Y. & Yin, W. Y. (1999) Two new species of Collembola (Arthropleona: Neanuridae, Pseudachorutidae) from Shanghai, China. Acta Entomologica Sinica, 6 (3), 222 - 226. https: // doi. org / 10.1111 / j. 1744 - 7917.1999. tb 00115. x"]}

We investigate asymptotical stabilization for a class of chaotic systems by means of quantization measurements of states. The quantizer adopted in this paper takes finite many values. In particular, one zoomer is placed at the input terminal of the quantizer, and another zoomer is located at the output terminal of the quantizer. The zoomers possess a common adjustable time-varying parameter. By using the adaptive laws for the time-varying parameter and estimating boundary error of values of quantization, the stabilization feedback controller with the quantized state measurements is proposed for a class of chaotic systems. Finally, some numerical examples are given to demonstrate the validity of the proposed methods.

Realistic networks display not only a complex topological structure, but also a heterogeneous distribution of weights in connection strengths. In addition, the information spreading through a complex network is often associated with time delays due to the finite speed of signal transmission over a distance. Hence, the weighted complex network with coupling delays have meaningful implications in real world, and resultantly gains increasing attention in various fields of science and engineering. Based on the theory of asymptotic stability of linear time-delay systems, synchronization stability of the weighted complex dynamical network with coupling delays is investigated, and simple criteria are obtained for both delay-independent and delay-dependent stabilities of synchronization states. The obtained criteria in this paper encompass the established results in the literature as special cases. Some examples are given to illustrate the theoretical results.