Oxysarcodexia insolita Lopes, 1946

Souza, Carina Mara De, Pape, Thomas & Thyssen, Patricia Jacqueline, 2020, Oxysarcodexia Townsend, 1917 (Diptera: Sarcophagidae) - a centennial conspectus, Zootaxa 4841 (1), pp. 1-126 : 65-66

Oxysarcodexia insolita Lopes, 1946

( Figs 151–153 )

Oxysarcodexia insolita Lopes, 1946b: 89 ; Guyana, Esequibo River , Moraballi Creek. Holotype male and female allotype in NHMUK (not examined).

Diagnosis. Male. Length 11.0 mm. Postocular plate with pale golden pollinosity. Ocellar bristles weakly developed. Thorax and abdomen with golden pollinosity, more evident laterally; T5 partly with golden pollinosity. Two welldifferentiated posterior and 1–3 smaller anterior post-sutural dorsocentrals. Apical scutellar bristles present. Legs brownish. T3 with 2 pairs 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 scattered bristles on arms. Cercus sinuous in lateral view, apex expanded and with straight margin. Cercus with bristles ventrally only in distal third. Cerci with distal third broader than middle part in posterior view; parallel and with a distinct constriction mid length. Pregonite with expanded base, gradually narrowing to apex, which is darker than base. Postgonite like pregonite, except unicolorous. Distiphallus with serrated ventroapical margin, rounded apex and straight dorsal outline. Vesica symmetrical, with rounded median projection of main branch; distal lobes well developed, with basal area more expanded than apical area; with filaments, tapering, sclerotized, with spines only on ventral surface.

Remarks. Oxysarcodexia major Lopes, 1946b , considered a closely related species ( Lopes 1946b), can be separated from O. insolita by the ventroapical surface of the distiphallus, which has a serrated margin in O. insolita ( Fig. 152 ) and carries a small group of spines arranged in a line in O. major ( Fig. 171 ). The vesica is elongate and presents spines on the ventral surface in both species, but in O. insolita it is spearhead-shaped with long spines, and the median area is U-shaped in lateral view; in O. major the vesica is shaped like a grass blade, with short spines and L-shaped median areas. Oxysarcodexia petropolitana Lopes, 1975c ( Fig. 229 ) is similar to O. insolita ( Fig. 152 ) and O. major ( Fig. 171 ) ( Lopes 1975c), but it differs from these species mainly in the shape of the distal lobes of the vesica (long filaments, sharply curved backwards and with expanded base in O. petropolitana ; short filaments, slightly curved backwards and with expanded base in O. insolita ; long filaments, slightly curved backwards and without expanded base in O. major ), the distiphallus apex (serrated ventroapical margin in O. insolita and O. major , rounded in O. insolita and O. petropolitana , slightly conical in O. major ), and the cercus (straight in lateral view in O. petropolitana and sinuous in O. insolita and O. major ). The female of O. insolita has an undivided T7 ( Tibana & Mello 1985).

Distribution. NEOTROPICAL. Brazil (Pará), Ecuador *, Guyana, Mexico (Chiapas, Veracruz), Trinidad and Tobago ( Trinidad).

Biology. Oxysarcodexia insolita has been reared in the laboratory on agar and powdered milk, developing from first instar to adult in 14–17 days. It has been bred from human feces under natural conditions ( Lopes 1973b).

Material examined. [ ♂] ECUADOR: Napo; Yasuní National Park; Yasuní Research Station ; 76°36′W 00°38′S; 3–20 XI 1998: T. Pape & B. Viklund / NRM-DIPT 0014317 [ NRM] // [♂] [Brazil] Cult. 837v / Pacatuba Belém Pará H.S.Lopes VIII 69 / Oxysarcodexia insolita Lopes Det. H. S. Lopes ♂ [ MNRJ] .

Figures

FIGURES 148–156. Oxysarcodexia spp., males. 148–150. Oxysarcodexia injuncta (Walker) (Brazil, Minas Gerais, Extrema, LIE). 148. Habitus, lateral view. 149. Terminalia, lateral view. 150. Terminalia, posterior view. 151–153. Oxysarcodexia insolita Lopes (Ecuador, Napo Province, NRM). 151. Habitus, lateral view.152. Terminalia, lateral view. 153. Terminalia, posterior view. 154–156. Oxysarcodexia intona (Curran & Walley) (Brazil, Rio de Janeiro, NRM). 154. Habitus, lateral view. 155. Terminalia, lateral view. 156. Terminalia, posterior view.

FIGURES 166–172. Oxysarcodexia spp., males. 166–169. Oxysarcodexia maiae sp. n., holotype (Ecuador, Napo Province, MZPUCE). 166. Habitus, lateral view. 167. Terminalia, lateral view. 168. Terminalia, posterior view. 169. Terminalia, ventroapical view. 170–172. Oxysarcodexia major Lopes (Colombia, Antioquia, CE-TdeA). 170. Habitus, lateral view. 171. Terminalia, lateral view. 172. Terminalia, posterior view.

FIGURES 228–236. Oxysarcodexia spp., males. 228–230. Oxysarcodexia petropolitana Lopes, paratype (Brazil, São Paulo, MNRJ). 228. Habitus, lateral view. 229. Terminalia, lateral view. 230. Terminalia, posterior view. 231–233. Oxysarcodexia plebeja Lopes (Colombia, Antioquia, Medellín, CE-TdeA). 226. Habitus, lateral view. 227. Terminalia, lateral view. 228. Terminalia, posterior view. 234–236. Oxysarcodexia ramosa (Reinhard), holotype (USA, Texas, Donnas, CNC). 234. Habitus, lateral view. 235. Terminalia, lateral view. 236. Terminalia, posterior view. Figs 234–235 by J.E. O’Hara (CNC); Fig. 236 adapted from Dodge (1966).