Robustagramma mayense 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 : 79-81

Robustagramma mayense Cui and Marshall , new species

( Figs. 228–234 )

As described for Robustagramma biangulatum except as follows.

Body length 1.4–1.9 mm. Postocellar bristles always present, cruciate, half as long as postvertical bristle. Length of second costal sector ca. 0.41–0.44X length of third. Mid

tibia of male with short, stout bristles on distal third. Mid femur of male with two rows of about 10 proximal ventral bristles.

Male terminalia: In lateral view, surstylus with anteroventral margin distinctly rounded, and apical margin slightly concave.

Female terminalia: Paired spermathecae with thick distal portion similar in length to thon basal portion, and ducts meeting spermathecal bodies at small angle.

Holotype (♂, DEBU) and paratypes (40 ♂, 32 ♀, DEBU): BELIZE: Mountain Pine

Ridge, Hidden Valley Inst., 2500ft, grass­pine, dung traps, 10–15.i.1991, S.A. Marshall.

Comments: Robustagramma mayense is very similar to Robustagramma biangulatum , differing mostly in the shape of surstylus, the shape of basal portions of paired spermathecae, and development of postocellar bristles.

Figures

FIGURES 228–234. Robustagramma mayense sp. nov.: 228, posterior view of male terminalia; 229, lateral view of male terminalia; 230, lateral view of male internal genitalia; 231, male sternite 5; 232, dorsal view of female terminalia; 233, ventral view of female terminalia; 234, spermathecae.