Cryptotendipes Beck et Beck 1969
Creators: name: Mukherjee, Bindarika
name: Mukherjee, Tuhar
name: Hazra, Niladri
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Cryptotendipes

description: A world key to the species of the genus Cryptotendipes Beck et Beck (male)
(modified after Pal et Hazra, 2018)
1. Inner margin of gonostylus with basal or median projection.................................................. 2
- Inner margin of gonostylus without projection............................................................ 24
2(1). Inner margin of gonostylus with median projection......................................................... 3
- Inner margin of gonostylus with basal projection.......................................................... 13
3(2). Anal point not longer than superior volsella............................................................... 4
- Anal point longer than superior volsella.................................................................. 6
4(3). Gonostylus with distinct concavity in apical half.............................. C. tuberosus Saether, 2010 (Nearctic)
- Gonostylus without distinct concavity................................................................... 5
5(4). Superior volsella columniform and straight; anal point rounded at apex...... C. nigronitens (Edwards, 1929) (Palaearctic)
- Superior volsella digitiform and curved; anal point pointed at apex............. C. pflugfelderi Reiss, 1964 (Palaearctic)
6(3). Anal tergite with high ridge or keel lies dorsally............................................................ 7
- Anal tergite without ridge or keel....................................................................... 8
7(6). Acrostichals 1–7; dorsal ridge on proximal part of TIX....................... C. casuarius (Townes, 1945) (Holarctic)
- Acrostichals absent; dorsal protrusion on distal part of TIX.................... C. lyalichi (Zorina, 2006) (Palaearctic)
8(6). Anal point with setae in basal half...................................................................... 9
- Anal point without setae............................................................................. 10
9(8). AR greater than 2.00; superior volsella with 2–3 apical setae and without lateral setae................................................................................................. C. usmaensis (Pagast, 1931) (Palaearctic)
- AR less than 2.00; superior volsella with 1 apical seta and 2 lateral setae.... C. tobatertius Kikuchi et Sasa, 1990 (Oriental)
10(8). Superior volsella with microtrichia only at base; inner margin of gonostylus sharply incised after proximal half.............................................................................. C. emorsus (Townes, 1945) (Holarctic)
- Superior volsella with or without microtrichia; gonostylus smoothly curved, without any sharp concavity............. 11
11(10). Superior volsella distinctly bilobed............................. C. daktylos (Walley in Curran, 1934) (Neotropical)
- Superior volsella not bilobed......................................................................... 12
12(11). Superior volsella curved, swollen at apex and truncated; anal point tapering to point...................................................................................................... C. pilicuspis Saether, 1977 (Nearctic)
- Superior volsella straight, not swollen at apex; anal point parallel–sided to point........................................................................................... C. parallelus Yan, Tang et Wang, 2005 (Palaearctic)
13(2). Small digitiform lobe lies nearer to middle of anal point.................................................... 14
- Anal point without lobe.............................................................................. 19
14(13). Long setae of inner margin of gonostylus lies proximally (Figs. 1 D–E)..................... C. medialis sp.n. (Oriental)
- Long setae of gonostylus present on entire inner margin.................................................... 15
15(14). Tergite IX without dorsal or ventral lobes................................................................ 16
- Tergite IX with pair of dorsal or ventral lobes............................................................ 17
16(15). Gonostylus with basal 1/3 moderately inflated; superior volsella apically triangular (Figs. 3 A–B)........................................................................................ C. disparilis Pal et Hazra, 2018 (Oriental)
- Gonostylus with basal 2/3 moderately inflated; superior volsella digitoform............ C. rutteri Epler, 2018 (Nearctic)
17(15). Frontal tubercles absent; superior volsella pointed at apex, without microtrichia.............................................................................................. C. tobasecundus Kikuchi et Sasa, 1990 (Oriental)
- Frontal tubercles present; superior volsella obtuse at apex, covered by microtrichia.............................. 18
18(17). Bands of T IX fused; superior volsella constricted in middle, widened at apex........ C. acalcar Reiss, 1990 (Palaearctic)
- Bands of T IX separated; superior volsella slightly swollen in middle, rounded at apex...................................................................................... C. mongolkeleus (Sasa et Suzuki, 1997) (Palaearctic)
19(13). Tergite IX with distinct caudolateral shoulders.............................. C. darbyi (Sublette, 1960) (Holarctic)
- Tergite IX without caudolateral shoulders............................................................... 20
20(19). Superior volsella covered by microtrichia............................................................... 21
- Superior volsella without microtrichia.................................................................. 22
21(20). AR 2.26–2.66; gonostylus obtuse at apex....................... C. mongoljekeus (Sasa et Suzuki, 1997) (Palaearctic)
- AR 3.1–3.5; gonostylus pointed at apex....................................... C. ariel (Sublette, 1960) (Nearctic)
22(20). Anal point without lateral setae..................................... C. nodus Yan, Tang et Wang, 2005 (Oriental)
- Anal point with lateral setae.......................................................................... 23
23(22). Apex of anal point truncated; superior volsella either with 2 apical setae or 2 apical and 1 subapical setae............................................................................. C. daitogeheus Sasa et Suzuki, 2001 (Oriental)
- Apex of anal point swollen; superior volsella with 2 apical setae (Figs. 2 A–B).. C. aculeatus Pal et Hazra, 2018 (Oriental)
24(1). Gonostylus apically pointed; superior volsella with 1 apical and 3 subapical setae.... C. holsatus Lenz, 1959 (Palaearctic)
- Gonostylus apically rounded; superior volsella with 2 subapical and 2 apical setae.............................................................................................. C. pseudotener (Goetghebuer, 1922) (Holarctic)
description: Published as part of Mukherjee, Bindarika, Mukherjee, Tuhar & Hazra, Niladri, 2020, A new species of the genus Cryptotendipes Beck et Beck, 1969 (Diptera Chironomidae) from India, with a world key to the males and tentative phylogenetic relationship, pp. 201-223 in Zootaxa 4896 (2) on pages 210-218, DOI: 10.11646/zootaxa.4896.2.3, http://zenodo.org/record/4381520