Contribution to the knowledge of the dentipes group of the genus Brachiacantha (Coleoptera: Coccinellidae) Author Nestor-Arriola, Jorge Ismael Author Toledo-Hernández, Víctor Hugo text Zootaxa 2019 2019-12-03 4701 6 537 552 journal article 24748 10.11646/zootaxa.4701.6.3 64d9dc01-5c7b-4812-952d-4ac02724ea40 1175-5326 3562584 09AD0FE4-C812-4BF7-AB10-ABEFC3C8C44F Key to species of the Brachiacantha dentipes group: 1 Males with cusps on the fourth ventrite ( Fig. 1a )............................................... B. barberi Gordon - Males without cusps on the fourth ventrite................................................................. 2 2 Elytra black with the posterior border red, orange or yellow ( Fig. 2b )............................ B. erythrura Mulsant - Elytron black with the posterior margin black, one or more light spots present ( Figs. 1b , 6b , 8b , 9b , 11b , 13b )............ 3 3 Males with small ventral cusps, almost not visible ( Fig. 5a ). Basal lobe of male genitalia without apical hook ( Fig. 5b ).............................................................. B. brevicuspidata Nestor-Arriola & Toledo-Hernández - Males with ventral cusps not small, always visible. Male genitalia with or without apical hook........................ 4 4 Males with head black with front red or orange. Ventral cusps not truncate ( Fig. 6a ).................. B. stephani Gordon - Males with head totally yellow or orange. Ventral cusps truncate or not........................................... 5 5 Males with large ventral cusps, tuncated at apex ( Fig. 7 )........................................... B. tau LeConte - Males with ventral cusps not truncated.................................................................... 6 6 Males with ventral cusps short and rounded ( Fig. 8a )............................................ B. soltaui Gordon - Males with ventral cusps not rounded..................................................................... 7 7 Males with ventral cusps widely separated, short, divergent at apex ( Fig. 9a )................ B. bistripustulata (Fabricius) - Males with ventral cusps conspicuous, not short............................................................. 8 8 Males with ventral cusps longer than wide ( Figs. 10a , 11a ).................................................... 9 - Males with ventral cusps wider than long ( Fig. 12 ).......................................................... 10 9 Male genitalia with a large, rounded apical hook at the basal lobe ( Fig. 10b )................................................................................................. B. robustihamata Nestor-Arriola &Toledo-Hernández - Male genitalia with apical hook at the basal lobe not rounded ( Fig. 11c )..................... B. blaisdelli Nunenmacher 10 Male genitalia with apical hook......................................................................... 11 - Male genitalia without apical hook...................................................................... 12 11 Males with ventral cusps large and subtriangular, pointed at apex ( Fig. 12 )....................... B. quadrillum LeConte - Males with ventral cusps subtriangular, blunt at apex ( Fig. 13a )............................... B. dentipes (Fabricius) 12 Males with ventral cusps joined by an arcuate emargination ( Fig. 14 )........................... B. subfasciata Mulsant - Males with large, subtriangular cusps with blunt apex ( Figs. 15a , 16a ).......................................... 13 13 Male genitalia with basal lobe slender ( Fig. 15b )...................... B. angulata Nestor-Arriola & Toledo-Hernández - Male genitalia with basal lobe wide ( Fig. 16b )........................ B. truncata Nestor-Arriola & Toledo-Hernández.