Oxysarcodexia occulta 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 : 81-82

Oxysarcodexia occulta Lopes, 1946

( Figs 201–203 )

Oxysarcodexia occulta Lopes, 1946b: 112 ; Brazil, Rio de Janeiro, Guanabara , Corcovado. Holotype male, female allotype, 14 male paratypes and nine female paratypes in MNRJ.

Diagnosis. Male. Length 8.0–10.0 mm. Postocular plate golden pollinosity. Ocellar bristles weakly developed. Thorax and abdomen with intense golden pollinosity, T5 partly with golden pollinosity. Two well-differentiated posterior and 1–3 smaller anterior post-sutural dorsocentrals. Apical scutellar bristles absent. Legs blackish. 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. Cercus, in lateral view, bent backwards with normal (i.e., as broad as median area), obliquely cut apex. Cercus with bristles ventrally only in distal third. Cerci with distal third as broad as middle part in posterior view; diverging. Pregonite with expanded base and sudden narrowing at apex, which is darker than base. Postgonite like pregonite, except unicolorous. Distiphallus with smooth ventroapical margin, rounded apex and sinuous dorsal outline. Vesica symmetrical, with angular median projection of main branch; distal lobes well developed, with filaments, tapering, flattened anteroposteriorly, partially membranous, without spines.

Remarks. See under O. comparilis . The female of O. occulta has an undivided T7 ( Tibana & Mello 1985).

Distribution. NEOTROPICAL. Brazil (Ceará, Mato Grosso, Mato Grosso do Sul, Pará, Rio de Janeiro, Roraima, São Paulo *), Colombia, Ecuador, Panama.

Biology. Reared in the laboratory on agar added to powdered milk, developing from first instar to adult in 14–17 days ( Lopes 1973b). In natural environments, adults have been caught using feces and rotten banana mixed with brown sugar as bait ( Lopes 1973b), and larvae obtained from one female were reared on human feces, taking 4 days to reach the 3rd instar plus an additional 13 days to emerge as adults ( Lopes 1975a). This species has also been collected above E. burchellii army ant raids on Barro Colorado Island ( Dodge 1968). This species has been collected with Malaise and Shannon traps ( Lopes & Tibana 1991), traps commonly used for collecting butterflies ( Lopes 1975a), and with sweep nets in an area of the Brazilian Cerrado after attracting the flies with chicken viscera, ground beef and fish as baits (LIE). In Guajira, Colombia, this species was collected in a forest area using a Van Someren-Rydon trap baited with decomposing fish ( Valverde-Castro et al. 2017). Oxysarcodexia occulta was collected in association with pig carcasses in a mesophytic semi-deciduous forest during the dry season ( Paseto et al. 2019).

Type material examined. Holotype ♂: [ Brazil] Corcovado Castasina Cult: 81 6-33 / H. S. Lopes [typed on back side of first label] / Holotype / Oxysarcodexia occulta [no italics] sp.n. Lopes. det 1944 / MNRJ 2247 [typed vertically on left side of label] [ MNRJ] // paratype ♂: [ Brazil] RIO CORCOVADO H. S. LOPES 5-933 / Paratype / Oxysarcodexia occulta [no italics] sp. n. Lopes-det 1944 [ MNRJ] .

Other material examined. [♂] BRAZIL: São Paulo, Mogi Guaçu, Campininha , 18.IX.2011, C. G. P. Lima, M. D. Grella, N. M. Jimenez / Oxysarcodexia sp III, Mogi Guaçu-SP, 18/11/2011, 16 [ LIE] // [♂] BRAZIL: São Paulo, Mogi Guaçu, Campininha , 18.IX.2011, C. G. P. Lima, M. D. Grella, N. M. Jimenez / Oxysarcodexia sp III, Mogi Guaçu-SP, 18/11/2011, 16 [ LIE] .

Figures

FIGURES 201–209. Oxysarcodexia spp., males. 201–203. Oxysarcodexia occulta Lopes (Brazil, São Paulo, Mogi Guaçu, LIE). 201. Habitus, lateral view. 202. Terminalia, lateral view. 203. Terminalia, posterior view. 204–206. Oxysarcodexia orbitalis Dodge, holotype (Martinique, Mont Pélé, USNM). 204. Habitus, lateral view. 205. Terminalia, lateral view. 206. Terminalia, posterior view. 207–209. Oxysarcodexia pallisteri Dodge, holotype (Peru, Machu Picchu, Pueblo Cusa, AMNH). 207. Habitus, lateral view. 208. Phallic complex (flipped horizontally to facilitate comparisons). 209. Cercus and surstylus, lateral view (flipped horizontally to facilitate comparisons). Figs 204–206 by N.E. Woodley (USNM) and T. Dikow (USNM); Figs 207–208 by D. Grimaldi (AMNH); Fig. 209 adapted from Lopes (1975c).