Colotrema, Wittmer, 1979

Plonski, Isidor S., 2017, Colotrema socotrana sp. nov. from Socotra Island, with new records of the genus from Yemen (Coleoptera: Malachiidae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 57, pp. 125-131 : 130

Key to the species of Colotrema occurring in the Arabian Peninsula and the Socotran Archipelago

1 Scutellum orange. Elytra unicolorous yellow-brownish to orange. .............................. 2

– Scutellum black. Elytra bicolorous. .............................................................................. 3

2 Pygidium incised at apex. ....................................... C. testacea testacea Wittmer, 1979

– Pygidium not incised. ............................................ C. testacea wajjensis Wittmer, 1980

3 Head capsule predominantly black. ..................................... C. asirensis Wittmer, 1979

– Head capsule unicolorous orange...................................................................................4

4 Elytra predominantly black, with sides, apices and suture (to varying extent) yellow. ... ....................................................................................................... C. socotrana sp. nov.

– Elytra predominantly orange-yellow, with a basal black macula, which does not reach sides. .................................................................................. C. impressa (Wittmer, 1954)