Arrhopalites

KEY FOR IDENTIFICATION OF THE ASIAN Arrhopalites .

1 Ventral dental seta ve5 present ...................................................................................... 2

­ Ve5 never present .......................................................................................................... 7

2 Anal valve spines 3+2 on each side ............................................................................. 3

­ Anal valve spines 2+2 or 2+1 or absent ........................................................................ 4

3 Seta E10­11 of the anal valve absent, dorsal dental setae E6­7 present, L4 spinelike, ventral setae of dens 3:2:1:1:1, ant. iv with 5 ringed subsegments. A. antrobius (fig. 2)

­ Setae E10­11 of the anal valve present, dorsal dental setae E7 absent, L4 absent, ventral setae of dens 3:2:2:1:1, ant. Iv with 6 ringed subsegments, first unguis without tunica A. anulifer

4 Anal valve spines absent ............................................................................................... 5

­ Anal valve spines present.............................................................................................. 6

5 Ant. iv not subsegmented, all ungues with inner tooth, all unguiculi with corner tooth, dental Id2­3 absent, eyes absent............................................................... A. pukouensis

­ Ant. iv with 7 ringed subsegments, no inner tooth, no corner tooth, dental Id2­3 present, 1+1 eyes present ....................................................................................... A. gul

6 Anal valve spines 2+2 on each side, ventral dental setae 3:2:1:1, anal valve setae C3­6 basally swollen or weakly lamellate, tenaculum with one seta on anterior process, unguis I without inner tooth...................................................................…....... A. nivalis

­ Anal valve spines 2+1 on each side, ventral dental setae 3:2:1:1:1, anal valve setae C3­ 6 clearly lamellate, tenaculum with two setae on anterior process, unguis I with a small inner tooth .......................................................................................... A. minutus (fig. 6)

7 Anal valve seta C1 forked,.............................................................................................8

­ Anal valve seta C1 not forked ...................................................................................... 9

8 Female subanal appendage rod­like, flattened and barbed in distal two thirds, C2­6 swollen basally, D5, E9­10 present, no tunica................................…... A. habei (fig. 4)

­ Female subanal appendage forked and laterally serrated, C2­6 as normal setae, D5, E9­10 absent, ungues II and III with tunica.......................................….. A. carpathicus

9 Eyes absent, ant. iv with 15 subsegments........................................….. A. uenoi (fig. 8)

­ Eyes present, ant. Iv with 8 subsegments or less.............................….........................10

10 Dental seta E2 not spinelike, E3 strongly spinelike ................................................... 11

­ Dental seta E2 and E3 spinelike..............................................................…….............14

11 AnalvalvesetaeC1­6notswollenbasally,subanalappendageforkedandexternallyserrated A. chiangdaoensis

­ Anal valve setae C1­6 swollen basally, subanal appendage not forked ..................... 12

12 AnalvalvesetaC7­8basallyswollen,D5absent,dentalId2­3present,ant.iiibasallyswollen A. alticola (fig. 1)

­ Anal valve setae C7­8 not swollen basally, D5 present, dental Id2­3 absent, ant. Iii not swollen basally ........................................................................................................... 13

13 Ant. iv with 7 subsegments, cephalic spines absent, anal valve setae C2­6 slightly swollen basally, subanal appendage broadly flattened with distal half serrated ............ ................................................................................................................ A. nanjingensis

­ Ant. iv with 5 subsegments, cephalic spines present, anal valve setae C2­6 strongly swollen basally, subanal appendage deeply serrate in palmate fashion ... A. kolymensis

14 Ant. iii without basal swelling......................................................….........................15

­ Ant. iii with basal swelling................................................................……...................16

15 All unguiculi with corner tooth, supplementary IL present in posterior part of head, ant. iv with 7 subsegments, female subanal appendage deeply serrate .......................... ....................................................................................................... A. yosii sp. n. (fig. 9)

­ Third unguiculus without corner tooth, supplementary IL absent in the posterior part of head, ant. iv with 5 subsegments, female subanal appendage rod­like and laterally serrated at the distal third ................................................................................. A. ruseki

16 Anal valve setae C3­6 laterally branched or serrate..................... A. changbaishanensis

­ Anal valve setae not branched or serrate laterally....................................................... 17

17 Anal valve setae C2­6 slightly swollen basally, D5, E8 and E10­11 absent, D7 present, female subanal appendage rod­like, straight with serrate apex, ant. iv not subsegmented A. enzoensis sp. n. (fig. 3)

­ Anal valve setae C2­6 clearly swollen basally, D5, E8 and E11 present, D7 absent, female subanal appendage deeply serrate, ant. iv subsegmented............................... 18

18 Ant. iv 7 subdivided, cephalic M5 spinelike, female subanal appendage deeply serrate at the apex, dental L4, E7 and Id3 absent, no corner teeth, anal valve C3­4 weakly lamellate, E10 present ................................................................ A. octacanthus (fig. 7)

­ Ant. iv 8 subdivided, cephalic M5 absent, female subanal appendage serrate from the second third towards the tip, dental L4, E7 and Id3 present, anal valve C3­4 not lamellate E10 absent ................................................................................ A. japonicus (fig. 5)