Elytrogona nigrodorsata Blake, 1937

Chaboo, Caroline S., 2000, Revision And Phylogeny Of The Caribbean Genus Elytrogona Chevrolat (Coleoptera: Chrysomelidae: Cassidinae: Stolaini), The Coleopterists Bulletin 54 (3), pp. 379-394 : 389

Elytrogona nigrodorsata Blake

Figs. 6 , 11, 18

Elytrogona nigrodorsata Blake, 1937: 78 [original description]; Blackwelder, 1946: 743 [checklist].

Diagnosis. The elytral disc is completely black, and the pronotum and elytral explanate margins are brown.

Description. Body length 7.9–8.3 mm, width 5.5–8.4 mm. Antenna yellow to brown. Head, venter and legs yellow brown to dark brown. Pronotum widest in posterior half, with faint median groove; explanate margin curved upwards; anterior margin almost straight over head; posterior margin not projected at scutellum; anterior margin straightish over head. Prosternal collar well­defined, with slight medial depression; prosternal process smooth. Scutellum apparent externally, smooth and black. Elytra disc with large coarse adjoining punctation ( Fig. 6 ), explanate margin with sparse irregularly spaced smaller punctation. Metasternum 2.5–3 times wider than long, distorted and concave. Spermathecal duct short, with 2–6 coils.

Type. Deposited in Museum of Comparative Zoology, Cat. No. 22369. Paratype in U.S. National Museum, Cat. No. 51847. Published locality: Mt. Basil, northern Haiti, 4,700 ft, 9 Sept. 1934, coll. P. J. Darlington.

Specimens Examined. Type, paratype and four specimens (males and females) with the following label data:

DOMINICAN REPUBLIC: Independencia, 32 Km NW La Descubierta Sabana Real, 1,800 m, cloud forest trail, 26 November 1991, colls. Masner & Peck (2, CMNC); Independencia, Sierra de Nieba near crest, 5.5 Km NNW Angel Feliz, 18°41̍N, 71°47̍W, 1,570 m, dense cloud forest (1, SMCC), 21– 22 July 1992, colls. J. Rawlins, S. Thompson, C. Young, and R. Davidson.

Variation. Brown body color shows minor variations from red brown to flat brown. Antennal color varies from yellow to brown.

Remarks. Locality label indicate an elevated habitat.

Figures

Figs. 1–7. 1–2) Profiles, scale bar = 2 mm; 1) Elytrogona gemmata, profile; 2) Stoiba swartzii, profile; 3–7) Elytral punctation, square = 1 mm2; 3) E. bacca; 4). E. bulla; 5) E. gemmata; 6) E. nigrodorsta; 7) E. quatuordecimmaculata. Figs. 8–14. Claw tooth, scale bar = 0.125 mm. 8) E. bacca; 9) E. bulla; 10) E. gemmata; 11) E. nigrodorsata; 12) E. quatuordecimmaculata; 13) Stoiba indivisa; 14) Stoiba swartzii.

Figs. 15–19. Habitus, scale bar = 1 mm. 15) E. bacca; 16) E. bulla; 17) E. gemmata; 18) E. nigrodorsata; 19) E. quatuordecimmaculata.