Oxysarcodexia catica, Souza & Buenaventura, 2016

Souza, Carina Mara De & Buenaventura, Eliana, 2016, Three new species of Oxysarcodexia Townsend (Diptera: Sarcophagidae) from the Colombian Andes, Zootaxa 4084 (1), pp. 115-124 : 116-118

Oxysarcodexia catica sp. n.

( Fig. 1 )

Type material. Holotype ♂: COLOMBIA, Antioquia, Medellín,/ Pajarito, 06º17'10.7''N / 75º36'43.7''W, 1.929 m, 16.2 ºC,/ 14:15h, TVSR [Van Someren-Rydon trap], 19-ene-11 [January 2011], M13P1,/ I. Cadavid, A. Varela, C. Rave, Leg (CE-TdeA).

Description. Male ( Fig. 1A ). Total body length 7.3 mm (n = 1).

Head. Black in ground color, fronto-orbital, parafacial, and postocular plates with golden microtomentum. Occiput blackish with golden microtomentum. First two rows of occipital setulae black, others yellow or white. Frons about 0.1x head width at level of ocellar triangle. Frontal vitta blackish; frons with a row of 10–11 frontal setae. Inner vertical seta well-developed. Outer vertical seta 0.2x as long as inner one. Ocellar setae 0.9x as long as the uppermost frontal seta. One reclinate fronto-orbital seta, 1.3x as long as the uppermost frontal seta. Proclinate fronto-orbital setae absent. Gena and postgena with golden microtomentum and black setulae. Pedicel blackish. First flagellomere blackish with pale golden microtomentum and about 2.3x as long as pedicel. Arista dark brown and long plumose on proximal 3/4. Palpus dark brown.

Thorax. Black in ground color, entirely covered in golden microtomentum, interrupted by three longitudinal equibroad black vittae. Chaetotaxy: acrostichals 0 + 1, dorsocentrals 3 (middle one longer) + 3, intra-alars 2 + 2, supra-alars 2 + 3 (middle one longer), postalars 2, postpronotals 3 (lateral one longer), notopleurals 4 (2 long primaries and 2 shorter subprimaries), katepisternals 3 (middle one shorter and inserted slightly below the imaginary line uniting the two others), meropleurals 8–10, postalar wall with black setae. Scutellum with one pair of proximal setae, 1 pair of subapical setae, 1 pair of apical setae and one pair of discal setae. Prosternum with a few setulae on distal half. Wing. Hyaline, tegula black, vein R1 bare, vein R4+5 setulose along proximal 2/3 of distance to crossvein r-m, costal spine not differentiated; third costal sector without ventral setulae. Legs. Dark brownish. Fore femur with one posterodorsal row of setae, one posteroventral row of setae, and one posterior row of setae (of decreasing size from the proximal to the distal part of the femur). Fore tibia with one dorsal seta, one posterodorsal seta, and one posterior seta. Mid femur with five median anterodorsal setae, two pre-apical posterior setae, four anteroventral setae, one posteroventral row of setae (of decreasing size from the proximal to the distal part of the femur), and a posteroventral ctenidium of flattened, spine-like setae. Mid tibia with one anterior seta, two anterodorsal setae, two posterodorsal setae, one dorsal seta, one posterior seta, one posteroventral seta, and one ventral seta. Hind femur with one anterodorsal row of setae, one anteroventral row of long setae, one posterodorsal seta, and one posteroventral row of setae (of decreasing size from the proximal to the distal part of the femur). Hind tibia with one anteroventral seta, four anterodorsal setae, two dorsal setae, and two posterodorsal setae. Tarsomeres of fore and hind legs with short, ventral, golden setae.

Abdomen (excluding terminalia). Black in ground color, with golden and silvery microtomentum. Syntergite 1+2 and tergite 3 with one dorsal silvery spot and one lateral golden spot. Tergites 4–5 with one dorsal and one lateral golden spots. Syntergite 1+2 and tergite 3 each with two lateral marginal setae. Tergite 4 with three lateral marginal setae, and one pair of medial marginal setae. Tergite 5 with an uninterrupted row of several marginal setae (about 20 marginal strong setae). Sternites 2–4 wider than long, with scattered black setae.

Terminalia ( Fig. 1B −F ). Posterior margin of sternite 5 with a deep cleft; inner margin of each side of the cleft slightly expanded, making the cleft narrow, with parallel sides. Expansions with a squared distal margin. Syntergosternite 7+8 yellowish, with golden microtomentum, scattered short black setae and 11 strong marginal setae. Epandrium yellowish, with golden microtomentum and shorter black setae in comparison with the marginal setae of syntergosternite 7+8. Cercus straight in lateral view (although the cercus in Fig. 1B looks slightly bent backwards due to the positioning of the specimen aimed at having the phallus in perfect lateral view). Cercal prong narrow with a pointed apex. Surstylus wide, with a rounded apex, and sparse marginal and discal black setulae. Pregonite broad, tapering and slightly curved, with a rounded apex; except for the blackish apex, of a lighter color than that of postgonite. Postgonite dark brown, slender, slightly curved apically, and with a black and rounded apex. Phallus with a desclerotized band between basi- and distiphallus. Paraphallus antero-proximally with a lateral triangular extension above the vesica. Juxta sclerotized, yellowish, and hood-shaped. Medial juxtal margin notched in frontoapical view, with an anterior area of membranous appearance. Juxtal margin serrated anteriorly, smooth and slightly swollen posteriorly. Posterior juxtal margin slightly folded backwards. Vesica sclerotized and flattened, forming a leaf-shaped lobe with microspines on its dorsal and ventral surfaces and with a smooth and rounded distal margin. Acrophallus with a short median process and two lateral styli ( Fig. 1E ). Capitis circular.

Female unknown.

Distribution. NEOTROPICAL—Colombia (Antioquia).

Etymology. The specific epithet, which should be treated as a noun in apposition, is given in honor of Catalina (“Catica”) Buenaventura Ruiz, sister of the second author.

Remarks. The male terminalia structures of O. catica sp. n. resemble those of O. fraterna Lopes , O. peruviana (Lopes) and O. vittata (Walker) . The four species share a straight and narrow cercal prong with an acute apex, and a distally enlarged juxta with its margin serrated anteriorly and folded backwards posteriorly. However, the distal juxtal margin of O. catica sp. n. is more sclerotized and darker than that of O. fraterna , and lacks the antero-ventral elongated projections found in O. peruviana . The vesica in O. catica sp. n. forms a leaf-shaped lobe, which resembles those of O. fraterna and O. vittata , although the leaf-shaped lobe in O. catica sp. n. is narrower than in O. fraterna and wider than in O. vittata . Furthermore, O. catica sp. n. has the leaf-shaped lobe of a lighter color than that of O. peruviana . The mentioned species, including O. catica sp. n., have a similar enlargement of the juxta as that of Oxysarcodexia xon ( Dodge). Dodge (1968) proposed Xarcophaga as a monotypic genus only including X. xon . Lopes (1975) considered this species as belonging to Oxysarcodexia and as morphologically close to O. favorabilis (Lopes) and O. vittata . Lopes (1982) considered Oxysarcodexia , Xarcophaga , Apelophyla Hall , and Hybopygia as distinct valid genera, but these were subsequently synonymized under Oxysarcodexia by Pape (1996). Lopes (1975), Soares & Mello-Patiu (2010) and Souza & Paseto (2015) placed O. favorabilis , O. fraterna , O. mineirensis Souza & Paseto , O. nitida Soares & Mello-Patiu , O. notata Soares & Mello-Patiu , O. pallisteri Dodge , O. peruviana , O. vittata , and O. xon in the “ Xarcophaga group” because they exhibit a characteristically enlarged apex of the phallus, here considered as a distal enlargement of the juxta. Oxysarcodexia catica sp. n. is considered as belonging to this species-group.

Figures

FIGURE 1. Oxysarcodexia catica sp. n., holotype ♂. A. Habitus, lateral view. B. Terminalia, lateral view. C. Genitalia, anterior view. D. Distiphallus, anteroapical view. E. Distiphallus, anterior view. F. Terminalia, posterior view. Abbreviations: ajm = anterior juxtal margin; ce = cercus; ep = epandrium; j = juxta; ls = lateral stylus; mp = median process; pjm = posterior juxtal margin; po = postgonite; pp = paraphallus; pr = pregonite; st = syntergosternite 7 + 8; su = surstylus; ve = vesica.