Acentroptera, Baly. Gemminger and Harold, 1876

Staines, C. L., 2014, A revision of the genus Acentroptera Guérin-Méneville, 1844 (Coleoptera: Chrysomelidae: Cassidinae), Insecta Mundi 2014 (332), pp. 1-19 : 2-3

Key to the described species of Acentroptera

1. Lateral margin of pronotum angulate in middle ........................................................................... 4

— Lateral margin of pronotum sinuate or arcuate ........................................................................... 2

2(1). Vertex of head impunctate; elytra with additional row of punctures between rows 5 and 6 in middle; orangish-yellow, elytra with reddish-purple vitta; 7.5-8.2 mm; Panama; Fig. 6 ............ ........................................................................... Acentroptera lineata Staines , new species

— Vertex of head punctate or rugose; elytra without additional row of punctures between rows 5 and 6 ............................................................................................................................................ 3

3(2). Pronotum with longitudinal medial sulcus; humerus angulate; sutural angle with small tooth; reddish-brown with black markings; 12.1 mm; Brazil; Figure 13 .............................................. ................................................................................................. Acentroptera zikani Uhmann

— Pronotum without longitudinal medial sulcus; humerus rounded; sutural angle without small tooth; testaceous, apical antennomeres and lateral margin of pronotum darker; 7.3-9.4 mm; Costa Rica, Guatemala, Honduras, Mexico; Fig. 7 .... Acentroptera nevermanni Uhmann

4(1). Sutural angle notched ................................................................................................................... 5

— Sutural angle not notched ............................................................................................................. 7

5(4). Humerus angulate; antennomere 1 transverse; elytra with additional row of punctures between rows 5 and 6 in middle; reddish-yellow, elytra with dark markings; 5.5 mm; Panama; Fig. 2 . ................................................................................. Acentroptera bita Staines , new species

— Humerus rounded; antennomere 1 subglobose; elytra without additional row of punctures between rows 5 and 6 ............................................................................................................................... 6

6(5). Pronotum with longitudinal medial sulcus; antennomere 1 shorter than 2; brownish-red, elytra with alternate interspaces paler; 8.6-10.0 mm; Bolivia, Brazil, Colombia, Ecuador, Panama, Peru; Fig. 4 ........................................................................... Acentroptera emdeni Uhmann

— Pronotum without longitudinal medial sulcus; antennomere 1 subequal to 2; uniformly yellowish, pronotum with lateral and medial longitudinal vittae, elytra with elongate darker spots; 7.7 mm; Brazil, Fig. 12 ................................................................... Acentroptera tessellata Baly

7(4). Vertex of head impunctate; testaceous, pronotum with brown medial vitta; 6.7-9.1 mm; Costa Rica, Panama; Fig. 11 .......................................................... Acentroptera strandi Uhmann

— Vertex of head punctate or rugose ................................................................................................ 8

8(7). Vertex of the head rugose ............................................................................................................. 9

— Vertex of the head punctate ......................................................................................................... 10

9(8). Sutural angle of elytra without tooth; reddish, pronotum with wide dark vitta on lateral margins and narrower medial longitudinal vitta, elytra yellowish with red margins and dark humeral band and transverse oblique band near posterior margin; 10.4-11.5 mm; Brazil, French Guiana; Fig. 8 .................................................................... Acentroptera norrisii Guérin-Méneville

— Sutural angle of elytra with small tooth; dark, elytra brownish-red with darker sublateral and sutural vittae (which sometimes unite or may be absent); 9.5-11.3 mm; Ecuador; Fig. 9 ........ ........................................................................................................ Acentroptera ohausi Weise

10(8). Pronotum without medial longitudinal carina or sulcus .......................................................... 11

— Pronotum with medial longitudinal carina or sulcus ................................................................ 12

11(10). Elytra with humerus rounded; yellowish-brown, pronotum with 3 longitudinal vittae, elytra pale yellow with lateral margin, suture, humerus, and apex darker plus 2 large dark maculae along sutural margin; 9.7-14.6 mm; Brazil; Fig. 10 .............................................................................. ....................................................................... Acentroptera pulchella (Guérin-Méneville)

— Elytra with humerus angulate; metallic blue-black, pronotum with 3 longitudinal vittae, elytra with large yellow transverse band on apical 1/3; 11.0-14.0 mm; Colombia, Brazil; Fig. 3 ....... .............................................................................. Acentroptera dejeanii Guérin-Méneville

12(10). Elytra with humerus rounded; pronotum reddish-brown with 3 dark longitudinal vittae, elytra shiny reddish-brown with 3 dark oblique bands; 11.0-12.0 mm; Argentina, Brazil, French Guiana, Paraguay; Fig. 1 ................................................................. Acentroptera basilica Thomson

— Elytra with humerus angulate; reddish-yellow; pronotum with three dark vittae, elytra with lateral margins dark and narrow dark transverse band present behind middle and at apex; 12.0-13.0 mm; Bolivia, Brazil; Fig. 5 ................................. Acentroptera lacordairei Lucas

Figures

Figures 1-9. Habitus of Acentroptera species. 1) Acentroptera basilica Thomson. 2) Acentroptera bita Staines n. sp. holotype. 3) Acentroptera dejeanii Guérin-Méneville. 4) Acentroptera emdeni Uhmann. 5) Acentroptera lacordairei Lucas. 6) Acentroptera lineata Staines n. sp. holotype. 7) Acentroptera nevermanni Uhmann. 8) Acentroptera norrisii Guérin-Méneville. 9) Acentroptera ohausi Weise.

Figures 10-13. Habitus of Acentroptera species. 10) Acentroptera pulchella (Guérin-Méneville). 11) Acentroptera strandi Uhmann. 12) Acentroptera tessellata Baly. 13) Acentroptera zikani Uhmann holotype.