Oxysarcodexia maiae, Souza & Pape & Thyssen, 2020

Souza, Carina Mara De, Pape, Thomas & Thyssen, Patricia Jacqueline, 2020, Oxysarcodexia Townsend, 1917 (Diptera: Sarcophagidae) - a centennial conspectus, Zootaxa 4841 (1), pp. 1-126 : 70-71

Oxysarcodexia maiae sp. n.

( Figs 166–169 )

urn:lsid:zoobank.org:act:9ED7A674-CABC-4B42-B885-462C95A5F6DA

Diagnosis. Postocular plate with pale golden pollinosity. Ocellar bristles longer than upper frontal bristles. Thorax grayish with pale golden pollinosity. Three well-differentiated post-sutural dorsocentral bristles; apical scutellar bristles absent. Legs dark brown. Abdomen with pale golden pollinosity; T1+2 with silvery pollinosity laterally. T1+2–3 with 1 pair of lateral marginal bristles, T4 with 3 pairs of lateral marginal and 1 pair of median marginal bristles. ST5 with deep median cleft with almost parallel arms. Cercus sinuous in lateral view, with pointed apex and parallel to its counterpart in posterior view. Pregonite broader than postgonite, slightly curved and with rounded apex; unicolorous. Postgonite slender, with curved, pointed apex; unicolorous. Distiphallus flower-like; apex expanded, with lateral and ventral projections, smooth margins and a wide opening. Vesica symmetrical, sclerotized, flattened, oblong, with microscopic spines ventroapically.

Description. Male. Length 6.0 mm.

Head. Fronto-orbital, parafacial and postocular plates with pale golden pollinosity; occiput blackish with silvery pollinosity, black bristles in dorsomedial and lateral areas and a few golden bristles in ventromedial area; frons 0.1x head width at level of ocellar triangle; frontal vitta blackish, with row of 8–9 frontal bristles; inner vertical bristle well developed; outer vertical bristle not differentiated; ocellar bristles 1.3x as long as uppermost frontals; reclinate fronto-orbital bristles 2.3x as long as uppermost frontal, proclinate bristles absent; gena and postgena blackish with pale golden pollinosity and black bristles; antenna dark brownish, first flagellomere with pale golden pollinosity and 2.2x as long as pedicel; arista brown and long plumose on proximal 3/4; palpus dark brown.

Thorax. Grayish with pale golden pollinosity. Chaetotaxy: acrostichals 0+1, dorsocentrals 3 (first weaker) + 3, intra-alars 2+2, supra-alars 2+3 (middle one stronger), postalars 2, postpronotals 3 (lateromedial one weaker), notopleurals 4 (2 large primaries and 2 smaller subprimaries), katepisternals 3 with middle one weaker and inserted slightly below others, meropleurals 9, postalar wall setose, scutellum with 1 basal, 1 discal, 1 lateral (weaker), 1 subapical and 0 apical bristles; prosternum with few bristles along margins. Wing. Hyaline, tegula black, vein R1 bare, vein R 4+5 setulose over 2/3 of distance to crossvein r-m, costal spine not differentiated, third costal sector without ventral setulae. Legs. Dark brown, fore femur with rows of bristles on posterodorsal, posteroventral, and posterior surfaces; fore tibia with 1 dorsal, 2 posterodorsal, 1 anterodorsal and 1 anterior bristles; mid femur with 5 anterodorsal, 2 pre-apical posterior, 4 anteroventral, 4 posteroventral bristles and a ctenidium of flattened spines on distal posteroventral surface; mid tibia with 2 posterodorsal, 1 posteroventral, 1 ventral, 1 anteroventral and 2 anterodorsal bristles; hind femur with 1 posterodorsal and 1 dorsal bristle, anteroventral and anterodorsal rows of long bristles, and apical row of posteroventral bristles; hind tibia with 1 anteroventral, 3 anterodorsal, 1 dorsal and 2 posterodorsal bristles; tarsomeres with weak ventral golden pollinosity.

Abdomen. Grayish with pale golden pollinosity. T1+2 with silvery pollinosity laterally. T1+2–3 with 1 pair of lateral marginal bristles, T4 with 3 pairs of lateral marginal and 1 pair of median marginal bristles, T5 with 18 strong marginal bristles. ST2–4 square with scattered bristles. ST5 with deep median cleft with almost parallel arms. Terminalia . Syntergosternite 7+8 brownish-yellow with golden pollinosity and scattered short black setulae and 8 marginal bristles. Epandrium brownish-yellow with golden pollinosity, 1 strong dorsoapical bristle and short black setulae. Surstylus triangular with enlarged base and sparse black marginal setulae. Cercus sinuous in lateral view, with pointed apex and parallel to its counterpart in posterior view. Pregonite broader than postgonite, slightly curved and with rounded apex; unicolorous. Postgonite slender, with curved, pointed apex; unicolorous. Distiphallus flowerlike; apex expanded, with lateral and ventral projections, smooth margins and a wide opening. Vesica symmetrical, sclerotized, flattened, oblong, with microscopic spines ventroapically.

Female. Unknown.

Etymology. The specific epithet is in honor of Maria José Maia de Souza, mother of the first author.

Remarks. See under O. ariozanoi sp. n., O. augusta and O. favorabilis .

Distribution. NEOTROPICAL. Ecuador.

Biology. Unknown.

Type material. Holotype ♂: ECUADOR: Napo Province: Yasuní National Park: Yasuní Research Station : 76°36′W 00°38′S: 3–20 XI 1998: T. Pape & B. Viklund / NRM-DIPT/0014490 [ MZPUCE].

Figures

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.