Troglocollops Wittmer 1965
Creators: name: Tong, Junbo
name: Tshernyshev, Sergei E.
name: Liu, Haoyu
name: Yang, Yuxia
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Melyridae
Troglocollops

description: Key to the species of the genus Troglocollops Wittmer, 1965
(males only)
1. Pronotum uniformly dark; antennomeres 1 and 3 feebly enlarged (Troglocollops (Troglocollops ))..................... 2
- Pronotum mixed yellow and black; antennomeres 1 and 3 distinctly swollen...................................... 8
2. Elytra dark, with yellow spots at the middle of suture, outer edge and apex.............. T. bituberculatus Wittmer, 1979
- Elytra uniformly dark.................................................................................. 3
3. Interocular area of head flat, with small ribs or protuberances.................................................. 4
- Interocular area of head distinctly impressed or hollowed..................................................... 5
4. Pronotum longitudinal; interocular area of head with two narrow transversal ribs (one in the midspan between eyes, the other in the distal part).............................................................. T. wittmeri Tshernyshev, 1995
- Pronotum transversal; interocular area of head with a short transversal crown-shaped protuberance in the middle....................................................................................... T. coronatus Wittmer, 1992
5. Frons with a deep transverse hollow.......................................... T. mordkovitshi Tshernyshev, 1994
- Frons or interocular area of head without transversal hollow................................................... 6
6. Dorsal surface of pronotum and elytra wrinkled; head with two longitudinal depressions, forming a peculiar median rib...................................................................................... T. niger Wittmer, 1992 - Dorsal surface of pronotum and elytra shagreened; head with one depression or crest............................... 7
7. Interocular area of head with a deep, rounded depression............................ T. sundukovi Tshernyshev, 1994
- Interocular area of head with a long and simple longitudinal crest, forming a little horn.................................................................................................... T. obscuricornis (Motschulsky, 1860)
8. Antennomere 3 prolonged and slightly impressed, distinctly smaller than 1 (Troglocollops (Alexeus ))................... 8
- Antennomere 3 impressed with outer edge slightly curved inwards, feebly larger than 1 (Troglocollops (Troglocollopsoides )) .................................................................................................. 11
8. Pronotum dark with narrow yellow edges.................................................................. 9
- Pronotum dark with wide yellow edges................................................................... 10
9. Interocular area of head yellow with a little dark spot; antennae with a little dark spot at apex.................................................................................................. T. tshemerisi Tshernyshev, 1994
- Interocular area of head yellow with a wide longitudinal dark spot; antennae entirely yellow.. T. mongolicus Wittmer, 1965
10. Sculpture of frons with two emarginations, median bristles black; antennomere 1 roundish.. T. logunovi Tshernyshev, 1994
- Sculpture of frons with one emargination, median bristles brown; antennomere 1 sharpened apically.................................................................................................. T. dlabolai Wittmer, 1968
11. Pronotum yellow with a black median longitudinal stripe reaching anterior and posterior edges; elytra dark with yellow apices; antennae yellow with a small black spot at apex................................... T. sinicus Tong & Yang, sp. nov.
- Pronotum and elytra dark with yellow edges; antennae yellow basally with antennomeres 6–11 entirely black........... 12
12. Interocular area of head flat, with small protuberances..................................... T. kaszabi (Evers, 1965)
- Interocular area of head hollowed or depressed............................................................ 13
13. Interocular area of head with a deep transversal hollow above eyes.......................... T. cinctus (Gebler, 1847)
- Interocular area of head with a round depression between eyes................................................ 14
14. Interocular depression wide and mostly black; elytra with narrow yellow edges...... T. latecavus latecavus Wittmer, 1969
- Interocular depression mixed black and yellow; elytra with wide yellow edges................................... 15
15. Interocular area of head black with yellow ribs of depression................... T. latecavus medvedevi Wittmer, 1979
- Interocular area of head with a narrow longitudinal dark spot.............. T. latecavus urianchaicus Tshernyshev, 1994
description: Published as part of Tong, Junbo, Tshernyshev, Sergei E., Liu, Haoyu & Yang, Yuxia, 2022, First record of the genus Troglocollops (Coleoptera, Malachiidae) from China with description of a new species, pp. 492-498 in Zootaxa 5195 (5) on pages 496-497, DOI: 10.11646/zootaxa.5195.5.7, http://zenodo.org/record/7223809