Onychotillus Chapin species

Opitz, Weston, 2022, Revision of the checkered beetle genus Onychotillus Chapin (Coleoptera: Cleridae: Tillinae), Insecta Mundi 2022 (913), pp. 1-16 : 2

Key of the adults of Onychotillus Chapin species

Specimens of Onychotillus may be distinguished from the superficially similar species of Callotillus Wolcott by the antenna that is comprised of 11 antennomeres. In Callotillus the antennae are comprised of 10 antennomeres. Also, the funicular antennomeres are slightly oblong in specimens of Onychotillus , which is not the case in Callotillus .

1. Proximal half of elytral disc testaceous ( Cuba).................. Onychotillus dimidiatus de Zayas

— Proximal half of elytral disc not testaceous.................................................. 2

2(1). Elytral sutural margin yellow ( Cuba)...................... Onychotillus cinctipennis (Chevrolat)

— Elytral sutural margin not yellow........................................................... 3

3(2). Epicranium partially yellow and partially black ( Dominican Republic)............................................................................ Onychotillus apiculus Opitz , new species

— Epicranium not partially black............................................................. 4

4(3). Pronotum with dark punctiform marking ( Dominican Republic)................................................................................. Onychotillus androwi Opitz , new species

— Pronotum without punctiform marking..................................................... 5

5(4). Elytra violaceous ( Jamaica, Dominican Republic)............................................ 6

— Elytra not violaceous ( Cuba).............................................................. 8

6(5). Pronotum yellow ( Dominican Republic)................. Onychotillus lineatus Opitz , new species

— Pronotum black......................................................................... 7

7(6). Base of femur and trochanter yellow, rest of leg black ( Dominican Republic)...................................................................... Onychotillus woodruffi Opitz , new species

— Entire leg brown ( Jamaica)....................................... Onychotillus vittatus Chapin

8(5). Legs testaceous................................................ Onychotillus minutus de Zayas

— Legs black.............................................................................. 9

9(8). Elytral striae not reduced near apex............................. Onychotillus trinitatis de Zayas

— Elytra striae reduced near apex.................................. Onychotillus cubana de Zayas