Oxysarcodexia perneta ( Walker, 1861 )

Souza, Carina Mara De, Pape, Thomas & Thyssen, Patricia Jacqueline, 2020, Oxysarcodexia Townsend, 1917 (Diptera: Sarcophagidae) - a centennial conspectus, Zootaxa 4841 (1), pp. 1-126 : 88-90

Oxysarcodexia perneta ( Walker, 1861)

( Figs 222–224 )

Sarcophaga perneta Walker, 1861: 308 ; Mexico. Male syntype in NHMUK (not examined). [Described from one or more males. Aldrich (1930: 20) found and examined “One male, Mexico ”. Not mentioned by Lopes (1975b).]

Diagnosis. Male. Length 10.0 mm. Postocular plate with golden pollinosity. Ocellar bristles weakly developed. Thorax and abdomen with golden pollinosity. Two well-differentiated posterior and 1–3 smaller anterior post-sutural dorsocentrals. Apical scutellar bristles present. Legs brownish. T3 with 1 pair of lateral marginal bristles, T4 with 1 pair of median marginal and 2 pairs of lateral marginal bristles. ST5 with deep median cleft with margins almost parallel and with pilosity and bristles at apex of arms. Cercus straight in lateral view, with pointed obliquely cut apex. Cercus with bristles ventrally over full length. Cerci with distal third narrower than middle part in posterior view; parallel and with a distinct constriction mid length. Pregonite and postgonite both with expanded base, gradually narrowing to apex; unicolorous. Distiphallus with smooth ventroapical margin, rounded apex, straight dorsal outline and small dorsoapical swelling. Vesica symmetrical, with rounded median projection of main branch; distal lobes well developed, rounded, membranous, with spines on both dorsal and ventral surfaces.

Remarks. Lopes (1946b) indicated differences in the shape of the vesica related to specimen preparation. In dry pinned flies, in which the structures were not separated at the moment the terminalia were exposed, the vesica can cover the apex of the distiphallus, whereas in specimens preserved in ethanol or properly dried (i.e., with structures separated from each other during drying), the vesica is more clearly separated from the rest of the distiphallus, so examination of the apex of the distiphallus and of the distal lobes of the vesica can be carried out more easily. See also remarks under O. angulosa sp. n. Female unknown.

Distribution. NEARCTIC. Mexico (Chiapas *, Distrito Federal, Morelos). NEOTROPICAL. Honduras, Mexico (Chiapas, Oaxaca).

Biology. Unknown. Collected by hand net or with fruit fly traps ( Lopes 1946c).

Material examined. [ ♂] [ Mexico] MEX. Chiapas, San Cristobal 7000m, 4 May 1969, H. J. Teskey / Oxysarc. perneta (Wlk.) , det. Lopes [ NHMD] // [♂] Col. Inst. O. Cruz N. 9.361 / Mexico D.F., A. Dampf [unreadable number] / Oxysarcodexia perneta Wulp ♂ xi-44 Det. H. S. Lopes [ MNRJ] // [♂] Cuernavaca Est. Morelos Mexico 1800m Dampf 1.IX a 5.XII / Oxysarcodexia perneta (Walker) Det. H. S. Lopes ♂ [ MNRJ] .

Figures

FIGURES 219–227. Oxysarcodexia spp. 219–221. Oxysarcodexia peltata (Aldrich) (Cuba, NHMD). 219. Habitus, lateral view. 220. Terminalia, lateral view. 221. Terminalia, posterior view. 222–224. Oxysarcodexia perneta (Walker) (Mexico, Morelos, Cuernavaca, MNRJ). 222. Habitus, lateral view. 223. Terminalia, lateral view. 224. Terminalia, posterior view. 225– 227. Oxysarcodexia peruviana (Lopes) (Argentina, MACN). 225. Habitus, lateral view. 226. Terminalia, lateral view. 227. Terminalia, posterior view. Figs 225–227 by P.R. Mulieri (MACN).