Robustagramma lingulatum 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 : 22-23

Robustagramma lingulatum Cui and Marshall , new species

( Figs. 13–17 , 364 )

As described for Robustagramma uniseta except as follows.

Male: Body length 1.6–2.0 mm. General color dark brown to black. Frons indistinctly flattened and shiny. Face and lower frons brown to dark brown. Two orbital bristles, anterior bristle 2/3 as long as posterior. Postvertical bristles similar to or slightly shorter than inner occipital bristles. Eye height ca.1.8–2.0 times genal height. Preapical palpal bristles slightly shorter than twice maximum width of palpus. Anterior portion of wing lightly infuscated. Costa ending near wing apex, extending past R 4+5 by 1–2 vein widths. Discal cell with or without a short stump vein M. Mid femur with 5–8 posteroventral bristles on basal half.

Sternite 5 with a row of 8 or 9 conspicuously stout bristles on border line between dark and pale portions, and two linguiform posterolateral flanges; some special scales on flanges. Surstylus relatively narrow in lateral view.

Holotype (♂, DEBU): VENEZUELA: Aragua. Henry Pitter N.P., Rancho Grande , 9.iv.1994, L. Masner.

Paratype: VENEZUELA: Merida. 6 km S Azulita , near road, 3.v.1988, S. A. Marshall (1 ♂, DEBU) .

Etymology: The name lingulatum refers to the shape of flanges of sternite 5.

Figures

FIGURES 13–17. Robustagramma lingulatum sp. nov.: 13, posterior view of male terminalia; 14, lateral view of male terminalia; 15, lateral view of male internal genitalia; 16, male sternite 5; 17, posterolateral flange of male sternite 5.

FIGURES 363–370. Robustagramma spp. wings (not to scale): 363, R. atratum sp. nov.; 364, R. lingulatum sp. nov.; 365, R. setilamella sp. nov.; 366, R. robustinervus sp. nov.; 367, R. binitidum sp. nov.; 368, R. macrosternum sp. nov.; 369, R. longistylum sp. nov.; 370, R. hebes sp. nov.