Oxysarcodexia Townsend, 1917 (Diptera: Sarcophagidae) - a centennial conspectus Author Souza, Carina Mara De carina_mara@yahoo.com.br Author Pape, Thomas tpape@snm.ku.dk Author Thyssen, Patricia Jacqueline carina_mara@yahoo.com.br text Zootaxa 2020 2020-08-31 4841 1 1 126 journal article 8542 10.11646/zootaxa.4841.1.1 18306272-d3ad-494e-a630-cf9f40132d2f 1175-5326 4405603 F55A3BE7-673C-4D46-9FC4-D5B5C7041DC0 Oxysarcodexia xon ( Dodge, 1968 ) ( Figs 287–289 ) Xarcophaga xon Dodge, 1968: 449 ; Panama , Canal Zone , Barro Colorado Island . Holotype male in UKAL (examined from photographs). Diagnosis. [Based on the original description ( Dodge 1968 ), on the diagnosis given by Lopes (1975c) , and on photographs provided by courtesy of Dr. Michael Engel and Dr. Caroline Chaboo (UKAL).] Male. Length 5.0–6.0 mm. Postocular plate with pale golden pollinosity. Ocellar bristles weakly developed. Thorax and abdomen with silvery pollinosity, although T5 presents yellowish pollinosity, more evident laterally. Three well-differentiated post-sutural dorsocentral bristles. Apical scutellar bristles absent. T3–4 with 1 pair of median marginal bristles. ST5 with deep median V-shaped cleft and short prolongations. Cercus straight (lateral view), with expanded obliquely cut apex. Cercus with bristles ventrally over full length. Pregonite with expanded base and gradual narrowing at apex; unicolorous. Postgonite with expanded base and sudden narrowing at apex; unicolorous. Distiphallus with serrated margin, lateral expansions, rounded apex and slightly sinuous dorsal outline. Vesica symmetrical; distal lobes well developed, with filaments, tapering, membranous, without spines. Remarks. Lopes (1975c) treated Xarcophaga as a synonym of Oxysarcodexia , but he was undecided whether or not the grouping of species presenting an apical enlargement of the distiphallus, i.e., a distal widening of the juxta, should have status as a valid genus. Dufek & Mulieri (2017) also pointed out that species included in this group share more elongate and narrow male cerci, a more elongate phallus, and juxta folded further backwards posteriorly. See remarks under O. ariozanoi . Female unknown. Distribution. NEOTROPICAL. Brazil ( Rio de Janeiro ), Panama . Biology. Unknown. Type material examined. No specimens were examined directly, but photographs of the holotype were provided by courtesy of Dr. Michael Engel and Dr. Caroline Chaboo ( UKAL ) .