Robustagramma bolivarense Cui and Marshall, 2005

Marshall, Stephen A. & Cui, Yongsheng, 2005, Systematics of Robustagramma, a new genus of New World Sphaeroceridae (Diptera), Zootaxa 1026 (1), pp. 1-122 : 43-45

Robustagramma bolivarense Cui and Marshall , new species

( Figs. 85–91 )

As described for Robustagramma crassipalpus except as follows.

General color fulvous to dark brown. Interfrontal bristles in three pairs. Anterior orbital bristle two­thirds as long as posterior. Ocellar, posterior orbital and outer vertical bristles similar in length; postvertical bristles parallel or convergent. Eye height ca. 2.5 times genal height. Aristal hairs 2.5 times as long as basal width of arista. Two palpal bristles, different in length. Preapical palpal bristle distinctly longer than submedial one, and slightly longer than, or subequal to, maximum width of palpus.

Prosternum with one or two pairs of setulae. Halter knob brown; stem pale yellow. Length of second costal sector 0.53–0.58 times length of third. R 2+3 twice as long as first sector of R 4+5; R 4+5 and costa ending together before wing apex. Tarsi and fore tibiae yellow to brownish. Mid tibia with a single dorsal proximal bristle, two or three strong anterodorsal submedian setulae, and an anterodorsal, dorsal and posterodorsal bristle distally. Mid femur with a row of 4–5 anterior bristles on distal half, a posterodorsal apical bristle.

Male terminalia: Sternite 5 ca. 1.5 times as long as sternite 4, with prominent posteromedial margin widely emarginate. Dorsomedial length of epandrium ca. 0.33X length of sternite 8. Surstylus similar in length to cercus.

Female terminalia: Sternite 7 similar in length to sternite 6, rounded posteromedially. Sternite 8 incompletely reduced to 2 sclerites, each articulating with a sclerite of tergite 8. Sternite 10 relatively large, with a densely­setulose central ridge. Spermatheca with a long duct, nearly 3 times as long as spermatheca.

Holotype (♂, DEBU): VENEZUELA: Bolívar. 135 km S El Dorado , 1400m, dung traps, 20.vii–7.viii.86, B. Gill.

Paratypes: VENEZUELA: Bolívar. 33 km S El Dorado , 220m, 2–7.viii.1986 (1 ♂, DEBU) ; Quebrada de Jaspe , 19–20.vii.86 (1 ♀, DEBU) , B. Gill. Bolívar. 22 km S El Dorado , lowland rainforest, FIT, 25.vi–12.vii.1987, S. & J. Peck (2 ♀, DEBU) .

Figures

FIGURES 85–91. Robustagramma bolivarense sp. nov.: 85, posterior view of male terminalia; 86, lateral view of male terminalia; 87, lateral view of male internal genitalia; 88, male sternite 5; 89, dorsal view of female terminalia; 90, ventral view of female terminalia; 91, spermathecae.