Brachiacantha dentipes (Fabricius, 1801)

Nestor-Arriola, Jorge Ismael & Toledo-Hernández, Víctor Hugo, 2019, Contribution to the knowledge of the dentipes group of the genus Brachiacantha (Coleoptera: Coccinellidae), Zootaxa 4701 (6), pp. 537-552 : 538-539

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.

Figures

FIGURE 1. Brachiacantha barberi, male. a) 3rd and 4th ventrites. b) Dorsal habitus.

FIGURE 2. Brachiacantha erythrura, male. a) Abdomen. b) Dorsal habitus.

FIGURE 5. Brachiacantha brevicuspidata, male. a) Third ventrite. b) Tegmen, concave side.

FIGURE 6. Brachiacantha stephani, male. a) Third ventrite. b) Dorsal habitus.

FIGURE 7. Brachiacantha tau, male, third ventrite.

FIGURE 8. Brachiacantha soltaui, male. a) Third ventrite. b) Dorsal habitus.

FIGURE 9. Brachiacantha bistripustulata, male. a) Third ventrite. b) Dorsal habitus.

FIGURE 10. Brachiacantha robustihamata, male. a) Third ventrite. b) Tegmen, concave side.

FIGURE 11. Brachiacantha blaisdelli, male. a) Third ventrite. b) Dorsal habitus. c) Tegmen, concave side.

FIGURE 12. Brachiacantha quadrillum, male, third ventrite.

FIGURE 13. Brachiacantha dentipes, male. a) Third ventrite. b) Dorsal habitus.

FIGURE 14. Brachiacantha subfasciata, male, third ventrite.

FIGURE 15. Brachiacantha angulata, male. a) Third ventrite. b) Tegmen, concave side.

FIGURE 16. Brachiacantha truncata, male. a) Third ventrite. b) Tegmen, concave side.