Two new species of the genus Thalassaphorura Bagnall, 1949 (Collembola: Onychiuridae) from South China, with an updated key to world species of the genus Author Sun, Xin Author Bedos, Anne Author Deharveng, Louis text Zootaxa 2017 2017-10-25 4338 2 319 332 journal article 31744 10.11646/zootaxa.4338.2.6 80f30000-004b-48ab-845d-d5e227850f8d 1175-5326 1036197 14E9C2F1-0D23-4538-85C0-EAC9D0D6A8DC Key to world species of the genus Thalassaphorura Bagnall, 1949 (Modified from Sun, Chen & Deharveng 2010 ) 1 Antennal base with 4 pso............................................................................... 2 - Antennal base with 3 pso.............................................................................. 4 2 AS absent, dorsal pso formula as 42/333/33332...................... T. hoguei ( Palacios-Vargas & Díaz, 1995 ) , Mexico - AS present.......................................................................................... 3 3 Head with 3+3 posterior pso, Abd. I–III terga with 4+4 pso each.............................................................................................. T. halophila ( Bagnall, 1937 ) sensu Fjellberg 1998 ; Northern Holarctic - Head with 2+2 posterior pso, Abd. I–III terga with 3+3 pso each................... T. tamurai ( Yue & Yin, 2000 ) ; China 4 AIIIO with 4 papillae................................................................................. 5 - AIIIO with 5 papillae................................................................................. 9 5 AS present.......................................................................................... 6 - AS absent........................................................................................... 8 6 Head with 3+3 posterior pso, dorsal pso formula as 33/033/333(4)43, pso absent ventrally, basal lamella on unguiculus absent, AS /unguis ratio as 0.8.................................................. T. biquaternata Sun & Li, 2015b ; China - Head with 2+2 posterior pso............................................................................ 7 7 Pso formula dorsally as 32/122/22332, ventrally as 1/000/001100, basal lamella on unguiculus present....................................................................................... T. butrosi ( Christiansen, 1956 ) ; Lebanon - Pso formula dorsally as 32/233/33343, ventrally as 11/000/01120, basal lamella on unguiculus absent........................................................................................... T. xihuensis Sun & Li, 2015a ; China 8 Pso formula ventrally as 11/000/01000, VT with 0+0/6+6/1+1 chaetae..................................................................... T. cryptopyga ( Denis, 1931 ) sensu Najt & Weiner, 1997 ; Neotropics, Pacific islands, Indonesia - Pso formula ventrally as 11/000/01120, VT with 1+1/6+6/2+2 chaetae........................................................................................................... T. tovtrensis (Kaprus’ & Weiner, 1994 ); Ukraine 9 Th. I tergum without pso.............................................................................. 10 - Th. I tergum with pso................................................................................ 13 10 Head with 3+3 posterior pso, unguiculus with basal lamella, AS /unguis ratio as 1......................................................................................... T. alborufescens ( Vogler, 1895 ) sensu Gisin (1957) ; Europe - Head with 2+2 posterior pso, unguiculus without basal lamella................................................ 11 11 Abd. I –III terga with 2+2 pso, AS /unguis ratio as 0.9....................... T. bagnalli ( Salmon, 1959 ) ; Great Britain. - Abd. I–III terga with 3+3 pso, AS /unguis ratio as 0.6–0.7.................................................... 12 12 Pso formula dorsally as 32/022/33323.................................. T. kirgisica ( Martynova, 1971 ) ; Kirghizstan - Pso formula dorsally as 32/033/33333............................................... T. lolae Arbea, 2017 ; Spain 13 Th. I tergum with 1+1 pso............................................................................. 14 - Th. I tergum with 2+2 pso............................................................................. 25 14 Pso formula dorsally as 32/11(3)1(2)/22(3)2(3)2(3)3, AS /unguis ratio as 0.9........................................ T. moniezi ( Bagnall, 1935 ) Great Britain . Note: Sun et al . (2010) , following Bagnall (1937) , consider the species as a member of his “group” “ T. debilis ”. - Pso formula dorsally different.......................................................................... 15 15 Th. II–III terga with 2+2 pso each....................................................................... 16 - Th. II–III terga with 3+3 pso each....................................................................... 19 16 Subcoxa 1 of legs I, II, III with 1, 1, 1 pso................................................................ 17 - Subcoxa 1 of legs I, II, III with 2, 2, 2 pso................................................................ 18 17 Pso formula ventrally as 11/000/01000, VT with 1+1 anterior chaetae..... T. reducta Sun, Chen & Deharveng, 2010 ; China - Pso formula ventrally as 11/000/01110, VT without anterior chaetae.................... T. guangxiensis sp. nov. ; China 18 3+3 chaetae between posterior pso on head, VT with 1+1 basal chaetae, AS /unguis ratio as 0.4, unguiculus/unguis ratio as 0.4, 3+3 paired axial chaetae on Abd. I–III terga........................... T. bapen Sun, Chen & Deharveng, 2010 ; China - 4+4 chaetae between posterior pso on head, VT with 2+2 basal chaetae, AS /unguis ratio as 0.6, unguiculus/unguis ratio as 0.7, 2+2 paired axial chaetae on Abd. I–III terga................................. guangdongensis Sun & Li, 2015a ; China 19 Abdominal sterna without pso, AS /unguis ratio as 0.7–1.1............. T. thalassophila ( Bagnall, 1937 ) ; Northern Europe - Abdominal sterna with pso............................................................................ 20 20 Pso formula on Abd. I–V dorsally as 33334, ventrally as 0 1120, subcoxa 1 of legs I, II, III with 1, 1, 1 pso, AS /unguis ratio as 0.3, d0 on head absent........................................ T. jailolonis ( Yoshii & Suhardjono, 1992 ) ; Indonesia - Pso formula on Abd. I–V different...................................................................... 21 21 Subcoxa 1 of legs I, II, III with 1, 1, 1 pso, pso formula dorsally as 32/133/33343, ventrally as 11/000/00010, unguiculus reduced to small blunt process..................................... T. brevisetosa Sun, Gao & Potapov, 2014 ; China - Subcoxa 1 of legs I, II, III with 2, 2, 2 pso................................................................ 22 22 Chaetae d0 on head absent, tibiotarsi with 6 chaetae in the distal whorl, labium type AB, VT with 0+0/8–11+8–11/1+1 (8– 10+ 8–10 in females, 11+ 11 in males, of which 9+9 modified) chaetae, pso formula on Abd. I –V dorsally as 33343, ventrally as 0 0 0 10, AS /unguis ratio as 1.1–1.2.............................. T. problematica Sun, Deharveng & Wu, 2013 ; China - Chaetae d0 on head present, tibiotarsi with 9 chaetae in the distal whorl, labium type AC........................... 23 23 3+3 p-chaetae between two inner posterior pso on head, VT with 1+1/7+7(8)/2+2 chaetae, pso formula on Abd. I–V dorsally as 3,3-4,3,4-6,3-4, ventrally as 0111(2)0, AS /unguis ratio as 0.47–0.77.................................................................................................... T. debilis ( Moniez, 1890 ) ; Western and northern Europe - 4+4 p-chaetae between two inner posterior pso on head..................................................... 24 24 AS /unguis ratio as 0.75, Th. I sternum with 1+1 chaetae................ T. grandis Sun, Chen & Deharveng, 2010 ; China - AS /unguis ratio as 0.2, Th. I sternum without chaetae................................ T. microspinata sp. nov. ; China 25 Pso formula dorsally as 32/233/33343................................................................... 26 - Pso formula dorsally different.......................................................................... 45 26 AS absent.................................................................... T. franzi ( Stach, 1946 ) ; Austria - AS present.......................................................................................... 27 27 Tibiotarsi with 6–7 chaetae in the distal whorl............................................................. 28 - Tibiotarsi with 9 chaetae in the distal whorl............................................................... 31 28 Pso formula on Abd. I –V ventrally as 0 0 0 10............................................................................................ T. sensilata ( Thibaud & Massoud, 1979 ) ; Dominica ( France ) , Guadeloupe (France), Mexico - Pso formula on Abd. I–V ventrally as 0 1120.............................................................. 29 29 1+1 dorsal S-chaetae on head, AS /unguis ratio as 1....... T. petaloides ( Rusek, 1981 ) ; Irak , New Caledonia , Hawaii , China - 2+2 dorsal S-chaetae on head.......................................................................... 30 30 Unguiculus/unguis ratio less than 0.2, head ventrally with 1+1 pso, AS /unguis ratio as 0.9................................................................................................. T. thaibinhensis Nguyen, 2001 ; Vietnam - Unguiculus/unguis ratio as 0.5, head ventrally with 2+2 pso, AS /unguis ratio as 0.7............................................................................................ T. tibiotarsalis Sun, Chen & Deharveng, 2010 ; China 31 Pso formula on Abd. I–V ventrally 11/000/01110.......................................................... 32 - Pso formula on Abd. I–V ventrally as 11/000/01120 or 11/000/11120........................................... 33 32 Th. I tergum with 7+7 chaetae, body length 1.4 mm ............................................................................................... T. duplopunctata ( Strenzke, 1954 ) sensu Fjellberg 1998 and; Northern Holarctic - Th. I tergum with 5+5 chaetae, body length 0.8–1.1 mm .............. T. pomorskii Sun, Chen & Deharveng, 2010 ; China 33 Pso formula ventrally as 11/000/11120, 1+1 dorsal S-chaetae on head, AS /unguis ratio as 1, Unguiculus /unguis ratio as 0.7, without basal lamella................................................... T. kwona ( Thibaud & Lee, 1994 ) ; Korea - Pso formula ventrally as 11/000/01120................................................................... 34 34 4+4 chaetae between inner posterior pso on head........................................................... 35 - 3+3 chaetae between inner posterior pso on head........................................................... 36 35 AS /unguis ratio as 0.5, VT with 1+1/6+6/2+2 chaetae, male ventral organ absent.................................... .................................................. T. lifouensis ( Thibaud & Weiner, 1997 ) ; New Caledonia , China - AS /unguis ratio as 0.9–1.0, VT with 1+1/7+7/2+2 chaetae, male ventral organ presents on VT as 2+2 strongly modified distal chaetae.............................................................. T. qinlingensis Sun & Wu, 2013 ; China 36 Th. I sternum without chaetae, PAO with 16–17 vesicles, Th. I tergum with 5+5 chaetae, unguiculus with basal lamella, unguiculus/unguis as 0.7, AS /unguis ratio as 0.3, on indistinct papillae, VT with 1+1/6+6/2+2 chaetae, Abd. VI tergum with one unpaired chaeta a0............................................ T. hainanica Sun, Gao & Potapov, 2014 ; China - Th. I sternum with 1+1 chaetae......................................................................... 37 37 PAO with about 10–13 vesicles, dorsal S-chaetae formula as 2/011/11101, unguiculus without basal lamella, unguiculus/unguis as 1, VT with 1+1/5+5/2+2 chaetae, Th. I tergum with 6+6 (7+7) chaetae, AS /unguis ratio as 0.4.................................................................................................. T. tenuis Babenko, 2007 ; Russia - PAO with more than 20 vesicles........................................................................ 38 38 Th. I tergum with 5+5 chaetae.......................................................................... 39 - Th. I tergum with more than 5+5 chaetae................................................................. 41 39 Abd. VI tergum with one unpaired axial chaeta (m0)......... T. zschokkei ( Handschin, 1919 ) sensu Pomorski 1998 ; Europe - Abd. VI tergum with two unpaired axial chaetae (a0 and m0)................................................. 40 40 Unguiculus without basal lamella, PAO with 21–23 vesicles, unguiculus/unguis ratio as 0.6, AS /unguis ratio as 0.6..................................................................................... T. linzhiensis Sun & Li, 2015a - Unguiculus with basal lamella, PAO with 24–26 vesicles, unguiculus/unguis ratio as 0.5, AS /unguis ratio as 1............................................................................. T. tiani Sun, Chen & Deharveng, 2010 ; China 41 Labial type A, VT with 1+1/6–7+6–7/1+1 (2+2) chaetae, 6 proximal chaetae on labium, AS/unguis ratio as 0.8............................................................. T. encarpata ( Denis, 1931 ) sensu Fjellberg 1998 ; Cosmopolitan - Labial type AC..................................................................................... 42 42 7 proximal chaetae on labium, VT with 0+0/6–7+6–7/0+0 chaetae, male ventral organ presents as 6–12 setae on Abd. II and 7– 10 on Abd. III arranged asymmetrically, AS /unguis ratio as 0.8.............. T. qixiaensis Yan, Shi, & Chen, 2006 ; China - 6 proximal chaetae on labium.......................................................................... 43 43 Furca with only two small dental chaetae, chaetae on ventral tube as 1+1/7+7/2+2, male ventral organ presents on VT as 2+2 strongly modified distal chaetae, AS /unguis ratio as 0.9........................... T. bisetosa Sun & Wu, 2013 ; China - Furca with four small dental chaetae..................................................................... 44 44 Chaetae on ventral tube as 1+1/7+7/2+2, male ventral organ presents on VT as 2+2 strongly modified distal chaetae, AS / unguis ratio as 0.7........................................................... T. petiti Sun & Wu, 2013 ; China - Chaetae on ventral tube as 1+1/6+6/2+2, male ventral organ presents on VT as 5+5 strongly modified distal chaetae, AS / unguis ratio as 1.1..................................................... T. macrospinata Sun & Wu, 2012 ; China 45 Pso formula on Abd. I–V dorsally as 32/233/33333......................................................... 46 - Pso formula on Abd. I–V dorsally different............................................................... 49 46 PAO with about 45 vesicles, AS/unguis ratio as 0.4................................. T. ishikawai ( Yosii, 1956 ) ; Japan - PAO with less than 40 vesicles......................................................................... 47 47 Unguiculus with basal lamella, PAO with about 25 vesicles, AS /unguis ratio as 0.7......................................................................................................... T. guineaensis ( Salmon, 1965 ) ; Guinea - Unguiculus without basal lamella....................................................................... 48 48 Th. I sternum without chaetae, pso formula ventrally as 1/000/11120............... T. yolandae ( Izarra, 1971 ) ; Venezuela - Th. I sternum with 1+1 chaetae, pso formula ventrally as 11/000/11200......... T. yodai ( Yosii, 1966 ) ; Nepal , China , Japan 49 Pso formula dorsally as as 32/1-233/3,3-4,3,4-6,3-4, ventrally as 11/000/0111(2)0, VT with 1+1/7+7(8)/2+2 chaetae, AS / unguis ratio as 0.47–0.77.............................................. T. debilis ( Moniez, 1890 ) ; Northern Europe - Pso formula different................................................................................. 50 50 Pso formula dorsally as 32/233/3333(4)2, ventrally as 11/000/00010, VT with “9–10+9–10” chaetae, AS /unguis ratio as 0.5............................................................................ T. orientalis ( Stach, 1964 ) ; China - Pso formula dorsally as 32/233/33342, ventrally as 1/111/00000, VT with 1+1/6+6/1+1 chaetae, AS /unguis ratio as about 0.7......................................................................... T. ghatensis ( Prabhoo, 1971 ) ; India