Robustagramma spinatimargo 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 : 88-89

Robustagramma spinatimargo Cui and Marshall , new species

( Figs. 264–270 )

As described for Robustagramma biangulatum except as follows.

Body length 1.2–1.8 mm. Postvertical bristle conspicuously smaller than inner occipital bristles. Postocellar bristles cruciate, slightly shorter than postvertical bristles. Eye height ca. 2.0–2.2 times genal height. Posterodorsal katepisternal bristle ca. 3/4 as long as distance between bristle base and wing base. Wing nearly clear, slightly pigmented in front of R 2+3. Length of second costal sector ca. 0.51–0.55X length of third. Mid tibia of male with short, stout ventral bristles on distal 2/3; mid femur of male, sometimes, with a row of slightly strong anteroventral setulae.

Male terminalia: Sternite 5 with 4–5 long, strong bristles on each side near posterior margin. Cercus relatively narrow, an ensiform gap between cerci.

Female terminalia: Two sclerites of sternite 8 small. Spermathecae with basal portion (paired) similar in length to, or (single) longer than, distal portion. Single spermatheca with a duct nearly twice as long as spermathecal body.

Holotype (♂, DEBU) and paratypes (4 ♀, DEBU): VENEZUELA: Aragua. Maracay, Rancho Grande , 1200m, cloud forest, FIT, 1–10.viii.1987, Bordon & Peck.

Other paratypes: COLOMBIA: Norte de Santander. Santiago , 2000ft, dung trap, 11–13.v.1974 (1 ♂, DEBU) ; 20 mi S Cucuta, Quebrada Honda , 2500ft, carrion trap, 13–15.v.1974, S. Peck (1 ♂, 1 ♀, UNCB) . Valle. AF Bosque de Yotoco, dung of “ Alovata seniculos ”( Miscetes seniculus?), 16.xi.1997, C. A. Medina (1 ♂, 6 ♀, DEBU) . Mo. ( Montería ?), malaise trap, 9.vii.1969, Pariler (2 ♀, USNM) . VENEZUELA: Aragua. Henri Pittier Natl. Pk., Rancho Grande ( Biol. Stn. ), “La Toma MN PM 94.04", 9.iv.1994, L. Masner (1 ♂, DEBU) .

Etymology: The specific epithet refers to the strong bristles on sternite 5 of the male.

Figures

FIGURES 264–270. Robustagramma spinatimargo sp. nov.: 264, posterior view of male terminalia; 265, lateral view of male terminalia; 266, lateral view of male internal genitalia; 267, male sternite 5; 268, dorsal view of female terminalia; 269, ventral view of female terminalia; 270, spermathecae.