Cryptoperla, Needham, 1909

Stark, Bill P. & Sivec, Ignac, 2007, New Species And Records Of Asian Peltoperlidae (Insecta: Plecoptera), Illiesia 3 (12), pp. 104-126 : 116-117

Provisional key to Cryptoperla males

( C. meyi , C. sinensis and C. torva unknown)

1 Basal cercal segment with apical spur or projecting lobe or lobes on inner margin ( Fig. 2 ) ……………………………………………………… 2

1’ Basal cercal segment without projecting apical spur or lobes ……………………………………. 17

2 Cercal spur curved dorsad ( Fig. 2 ) ……………. 3

2’ Cercal spur or lobes straight or directed mesad or ventrad ……………………………………….…... 5

3 Cercal spur simple, upturned abruptly at an approximate right angle ( Fig. 16 ) ………… hubleyi

3’ Cercal spur multidentate ( Fig. 2 ); curvature gradual …………………………………..……….. 4

4 Cercal spur with 1-3 long teeth ………….... karen

4’ Cercal spur with ca. 10 short teeth ( Fig. 2 ) ……………………………………..…..…… curvata

5 Cercal spur at least partially sclerotized, usually spine-like, acute but sometimes multidentate … 6

5’ Cercal spur or lobe unsclerotized, usually blunt, rounded or truncate and often bearing an apical tuft of setae ……………………………………... 13

6 Cercal process a single, often acute spur ………. 7

6’ Cercal process multidentate ……………………. 12

7 Cercal spur broad to midlength, abruptly narrowed to acute tip; spur parallels cerci and slightly exceeds subsequent five segments in length ……………………………………… stilifera

7’ Cercal spur tapered throughout length; spur divergent from cerci and not exceeding next three segments in length ..……………………………... 8

8 Known from mainland Asia ……………………. 9

8’ Known from Asian islands ……………………... 10

9 Cercal process bicolored, transparent apically; known from Thailand ……………………….. akha

9’ Cercal process uniformly pigmented; known from Yunnan and Sichuan, China ………...…… aculeata

10 Known from Ryukyu Islands ………. ishigakiensis

10’ Known from Taiwan …………………………….. 11

11 Cercal spur unpigmented, transparent, usually blunt and thumb shaped; ventrolateral aedeagal lobes move than twice as large as mesal lobes and moderately divergent from midline ……. uchidai

11’ Cercal spur usually pigmented and acute; ventrolateral aedeagal lobes slightly larger than mesal lobes and strongly divergent from mesal lobes ……………………………..……… formosana

12 Cercal spur spatulate with serrate apex … chiangi

12’ Cercal process with a major spur and 3-10 smaller dorsal spines ………………………….…... fraterna

13 Process of basal cercal segment consists of 4-5 short, truncate lobes with apical hair tufts …… dui

13’ Process of basal cercal segment a single, simple structure with or without apical hair tufts ..… 14

14 Apex of process about as wide as base; known from Fujian Province, China …………... fujianica

14’ Apex of process narrowed apically; known from Japan, Assam or Thailand …………………….. 15

15 Cercal process with 1-4 terminal setae; known from Assam or Thailand ……………………… 16

15’ Cercal process very hairy at apex; known from Shikoku, Japan ………………………… kawasawai

16 Cercal process about 3X long as wide; apex with 2-3 long setae; cercal segment 2 with a short dorsal process; known from Thailand..… bisaeta

16’ Cercal process slightly longer than wide; apex with 1-2 short setae; cercal segment 2 without dorsal process; known from Assam ……….... kali

17 Apex of basal cercal segment slightly swollen, producing a rounded process sometimes overlapping base of 2 nd segment …………….. naga

17’ Apex of basal cercal segment unmodified ……. 18

18 Known from Japan or Taiwan …………………. 19

18’ Known from mainland Asia ……………………. 20

19 Aedeagal apex with a pair of lateral lobes and a wide truncate mesal lobe; known from Japan ………………………………………………. japonica

19’ Aedeagal apex with a large rounded lobe and two subapical pairs of lateral lobes; known from Taiwan …………………………………….. klapaleki

20 Body length ca. 18 mm; tergum7 with a triangular mesal lobe overlapping most of tergum 8; known from China …………………………………… obtusa

20’ Body length ca. 15 mm or less; tergum 7 without mesal lobe; known from India, Nepal, Assam or Thailand …………………………………………. 21

21 Basal cercal segment less than 3.5X long as wide; cercal setal fringe sparse on inner margins …. meo

21’ Basal cercal segment at least 4X long as wide; cercal setal fringe often well developed on inner margins ……………………………..……………. 22

22 Basal cercal segment about 4.5X long as wide; aedeagal armature without dense, paired setal patches ……………………………….. pentagonalis

22’ Basal cercal segment about 5-6X long as wide ( Fig. 40 ); aedeagus armed with one or more mesal setal patches near base of ventroapical lobes ( Fig. 42 ) ………………………………………………….… 23

23 Aedeagus with a pair of dense mesal setal patches near base of ventroapical lobes; known from Assam ……………………………………….. kumari

23’ Aedeagus with a single, broad setal patch near base of ventroapical lobes ( Fig. 42 ), or a pair of sparse widely separated patches ( Fig. 28 ); known from Thailand …...……………………………… 24

24 Ventral aedeagal setae grouped in a single, wide patch ( Fig. 42 ); apical aedeagal section much wider than base; basal cercal segment about the same width throughout ( Fig. 40 ) ……….. simplex

24’ Ventral aedeagal setae grouped in a pair of widely separated, sparse patches ( Fig. 28 ); apical aedeagal section not conspicuously wider than base; basal cercal segment slightly swollen near midlength ( Fig. 27 ) ………………….………. kosai

Figures

Figs. 1-6. Cryptoperla curvata. 1. Adult head and pronotum, 2. Male terminalia, dorsal, 3. Male sternum 9, 4. Male basal cercal segment, lateral, 5. Male aedeagus, ventral, 6. Female terminalia.

Figs. 13-20. Cryptoperla structures. 13-14. C. fraterna. 13. Female terminalia, 14. Larval thoracic sterna, 15-20. C. hubleyi. 15. Male terminalia, dorsal, 16. Male basal cercal segments, lateral, 17. Male sternum 9, 18. Larval thoracic sterna, 19. Larval abdominal terga, 20. Larval cercal segments 5-12, lateral.

Figs. 39-42. Cryptoperla simplex. 39. Head and pronotum, 40. Male terminalia, dorsal, 41. Female terminalia, 42. Aedeagus, ventral.

Figs. 25-28. Cryptoperla structures. 25. C. ishigakiensis female terminalia, 26-28. Cryptoperla kosai. 26. Head and pronotum, 27. Male terminalia, dorsal, 28. Aedeagus, ventral.