Oxysarcodexia ariozanoi, 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: 24-26

publication ID

https://doi.org/10.11646/zootaxa.4841.1.1

publication LSID

lsid:zoobank.org:pub:F55A3BE7-673C-4D46-9FC4-D5B5C7041DC0

DOI

http://doi.org/10.5281/zenodo.4405675

persistent identifier

http://treatment.plazi.org/id/7A2C3145-C04F-45F5-B8D3-7B6F9E7DE09F

taxon LSID

lsid:zoobank.org:act:7A2C3145-C04F-45F5-B8D3-7B6F9E7DE09F

treatment provided by

Plazi

scientific name

Oxysarcodexia ariozanoi
status

sp. n.

Oxysarcodexia ariozanoi   sp. n.

( Figs 29–32 View FIGURES 25–32 )

urn:lsid:zoobank.org:act:7A2C3145-C04F-45F5-B8D3-7B6F9E7DE09F

Diagnosis. Postocular plate with golden pollinosity. Ocellar bristles smaller than upper frontal bristles. Thorax grayish with golden pollinosity. Three well-differentiated post-sutural dorsocentral bristles; apical scutellar bristles present. Legs dark brown. Abdomen with silvery pollinosity. T1+2 with 1 pair of lateral marginal bristles, T3 with 2 pairs of lateral marginal bristles and T4 with 4 pairs of lateral marginal and 1 pair of median marginal bristles. ST5 with deep median cleft with margins almost parallel. Cercus with a median expansion in lateral view and square, slightly curved apex. Cerci parallel in posterior view. Pregonite broader than postgonite, with slightly curved, rounded apex; unicolorous. Postgonite slender, with slightly curved, square apex; unicolorous. Distiphallus with obliquely cut apex, lateral, dorsal and ventral projections, smooth margins and wide ventroapical opening. Vesica well sclerotized, emerging pre-apically from phallic tube as a short branch that folds ventroposteriorly, culminating in flattened elongate lobes with microscopic membranous cuticular spines on dorsal surface.

Description. Male. Length 7.7 mm.

Head. Fronto-orbital, parafacial and postocular plates with golden pollinosity; occiput blackish with golden pollinosity, black bristles in dorsomedial and lateral areas and a few golden bristles in mediomedial area; frons 0.1x head width at level of ocellar triangle; frontal vitta blackish, with row of 14 frontal bristles; inner vertical bristle well developed, outer vertical bristle 0.3x as long as inner one; ocellar bristles 0.8x as long as uppermost frontals; reclinate fronto-orbital bristles 2.2x as long as uppermost frontal, proclinate bristles absent; gena and postgena blackish with golden pollinosity and black bristles; antenna dark brown, first flagellomere with pale golden pollinosity and 2.3x as long as pedicel; arista brown and long plumose on proximal 2/3; palpus dark brown.

Thorax. Grayish with golden pollinosity. Chaetotaxy: acrostichals 3+1, dorsocentrals 3 (first weaker) + 3, intraalars 2+2, supra-alars 2+3, postalars 2, postpronotals 3, notopleurals 4 (2 large primaries and 2 smaller subprimaries), katepisternals 3 with middle one weaker and inserted slightly below others, meropleurals 8–9, postalar wall setose, scutellum with 1 basal, 1 discal, 1 lateral, 1 subapical and 1 apical, and bristle; prosternum with few bristles along margins. Wing. Hyaline, tegula black, vein R 1 bare, vein R 4+5 setulose over 3/4 of distance to crossvein r-m, costal spine not differentiated, third costal sector without ventral setulae. Legs. Dark brown, fore femur with 2 rows of bristles on posterodorsal and 1 on posteroventral surface; fore tibia with 3 dorsal, 1 posterodorsal, 2 posteroventral and 1 posterior bristles; mid femur with 6 median anterodorsal bristles, 2 pre-apical posterior bristles, anteroventral and posteroventral rows of bristles and a ctenidium of flattened spines on distal posteroventral surface; mid tibia with 1 dorsal, 2 posterodorsal, 1 posterior, 1 posteroventral, 1 ventral, 1 anterior and 2 anterodorsal bristles; hind femur with 1 posterodorsal and 1 dorsal bristle, anteroventral and anterodorsal rows of long bristles and apical posteroventral and anterior rows of bristles; hind tibia with 2 anteroventral, 3 anterodorsal, 2 dorsal, 1 anterior and 2 posterodorsal bristles; fore and hind tarsi with weak ventral golden pollinosity.

Abdomen. Grayish with silvery pollinosity. T1+2 with 1 pair of lateral marginal bristles, T3 with 2 pairs of lateral marginal bristles, T4 with 4 pairs of lateral marginal and 1 pair of median marginal bristles, T5 with 20 strong marginal bristles. ST2–4 oblong with scattered setulae along posterolateral and posterior margins, ST5 with deep median cleft with margins almost parallel. Terminalia   . Syntergosternite 7+8 dark brownish with golden pollinosity, scattered black setulae and 8 marginal bristles; epandrium dark brownish with golden pollinosity, short black setulae and 2 strong bristles dorsoapically; surstylus oblong, elongate dorsoventrally, with sparse marginal and black discal setulae. Cercus with a median expansion in lateral view and square, slightly curved apex; cerci parallel in posterior view. Pregonite broader than postgonite, with slightly curved, rounded apex; unicolorous. Postgonite slender, with slightly curved square apex; unicolorous. Distiphallus with obliquely cut apex, lateral, dorsal and ventral projections, smooth margins and wide ventroapical opening. Vesica well sclerotized, emerging pre-apically from phallic tube as a short branch that folds ventroposteriorly, culminating in flattened elongate lobes with microscopic membranous cuticular spines on dorsal surface.

Female. Unknown.

Etymology. The specific epithet is given in honor of Ariozano de Souza, father of the first author.

Remarks. The “ Xarcophaga   group” was proposed informally by Lopes (1975c) for species with an enlarged apex of the distiphallus, i.e., a distal enlargement of the juxta. Dufek & Mulieri (2017) also pointed out that species in this group share a more elongate cercus compared to other Oxysarcodexia   , a typically narrow cercal prong, a more elongate phallus, and juxta folded backwards posteriorly, which excludes O. nitida   . The group is therefore composed by O. berthet   , O. catica   , O. favorabilis   , O. fraterna   , O. ibera   , O. liliarum   , O. mineirensis   , O. nitida   , O. notata   , O. pallisteri   , O. peruviana   , O. vittata   and O. xon   ( Figs 52 View FIGURES 51–59 , 64 View FIGURES 60–69 , 112 View FIGURES 108–116 , 126 View FIGURES 123–131 , 143 View FIGURES 139–147 , 164 View FIGURES 157–165 , 180 View FIGURES 173–181 , 196, 199 View FIGURES 192–200 , 208 View FIGURES 201–209 , 226 View FIGURES 219–227 , 279 View FIGURES 274–283 , 288 View FIGURES 284–292 ) ( Lopes 1975c; Soares & Mello-Patiu 2010; Souza & Paseto 2015; Souza & Buenaventura 2016; Dufek & Mulieri 2017), to which we here add O. ariozanoi   sp. n. ( Fig. 30 View FIGURES 25–32 ) and O. maiae   sp. n. ( Fig. 167 View FIGURES 166–172 ). We denote the group as “ xon   group”, in reference to the type species of Xarcophaga   and in agreement with Dufek & Mulieri (2017). A flower-like (e.g., Fig. 112 View FIGURES 108–116 ) or inflorescence-like (e.g., Fig. 164 View FIGURES 157–165 ) juxta is shared by O. ariozanoi   sp. n., O. favorabilis   , O. liliarum   , O. maiae   sp. n. and O. mineirensis   .

Distribution. NEOTROPICAL. Brazil (Rio de Janeiro).

Biology. Unknown.

Type material. Holotype ♂: BRAZIL: RJ Tijuca Forest nr Rio; 7–30.ix.1993, T.Pape / NRM-DIPT 0014641 [ MNRJ].  

MNRJ

Museu Nacional/Universidade Federal de Rio de Janeiro