Robustagramma brasilense 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 : 45

Robustagramma brasilense Cui and Marshall , new species

( Figs. 92–98 )

As described for Robustagramma crassipalpus except as follows.

Body length 2.0– 2.2 mm. General color reddish to dark brown. Face, gena, antenna and lower frons reddish yellow to brown; head otherwise dark brown. Interfrontal bristles in three pairs in addition to small interfrontal setulae. Ocellar bristle slightly longer than posterior orbital bristle, similar to outer vertical bristles. Postvertical bristles slightly convergent. Eye height ca. 2.2–2.5 times genal height. Aristal hairs ca. 2.5 times as long as basal width of arista. Preapical palpal bristle distinctly longer than submedial palpal bristle, similar in length to maximum width of palpus. Prosternum with two pairs of small setulae. Acrostichal setulae in 6–8 irregular rows between anterior dorsocentral bristles. First costal sector distinctly thinner than second costal sector. Length of second costal sector ca. 0.56X length of third. R twice as long as first sector of R 4+5. Fore tibiae yellow to reddish yellow. Mid tibia of male with an apicoventral bristle and several short ventral bristles on distal third; mid femur of male with a row of 6 ventral proximal bristles.

2+3

Male terminalia: Sternite 5 twice as long as sternite 4, with a tooth­like emargination on protrudent posteromedial margin. Dorsomedial length of epandrium ca. 0.4X length of sternite 8. In lateral view, surstylus slightly longer than wide.

Female terminalia: Sternite 7 longer than sternite 6, rounded posteromedially; sternite 8 completely reduced to 2 small sclerites, each articulating with a sclerite of tergite 8. Spermatheca with distal half similar in width to basal half. Paired spermathecae with long ducts, ca. 4 times as long as spermatheca.

Holotype (♂, DEBU): BRAZIL: Pará. Belem, APEG Forest , x.1969, light trap, T. H. G. Aitken.

Paratypes: BRAZIL: Bahia. 15 km NE Porto Seguro (Ecologica Reserva “Pau­Brasil”), Primary Atlantic Forest, Shannon trap, 19–27.ii.1986, Dalton de Souza Amorim and Vera Cristina S. Amorim (2 ♀, DEBU) .

Figures

FIGURES 92–98. Robustagramma brasilense sp. nov.: 92, posterior view of male terminalia; 93, lateral view of male terminalia; 94, lateral view of male internal genitalia; 95, male sternite 5; 96, dorsal view of female terminalia; 97, ventral view of female terminalia; 98, spermathecae.