Nephochaetopteryx equatoriana, Carvalho-Filho & Esposito & Mello-Patiu, 2021

Carvalho-Filho, Fernando Da Silva, Esposito, Maria Cristina & Mello-Patiu, Cátia Antunes De, 2021, Revision of Nephochaetopteryx Townsend, 1934 (Diptera: Sarcophagidae), Zootaxa 4928 (1), pp. 1-83 : 29-31

Nephochaetopteryx equatoriana sp. nov.

( Fig. 11 )

Type material. HOLOTYPE ♁ ( MNRJ): Coca , Napo R. / Napo, ECUADOR /. V.1965 / 250m., L. Pena // Nepho- chaetopteryx / near / marianae / Det. H.S. Lopes [printed and handwritten on rectangular white label bordered with black]. [Holotype in good condition, with cleared terminalia preserved in glycerin in a microvial pinned beneath the specimen.]

Description. Male (holotype). Length = 5.2 mm.

Head. Fronto-orbital and parafacial plates, postocular strip, gena and postgena with golden microtomentum. Frontal vitta black, reddish on basal half. Five to six frontal setae. Palpus yellow.

Thorax. Chaetotaxy: dorsocentrals 2+3; intra-alars 2+2; supra-alars 1+3; notopleurals 1, subprimary, anepisternals 5; merals 5. Mid femur with two median setae and without a differentiated posteroventral seta. Ctenidium consisting of four spines. Wing hyaline, with dark spot beginning in the terminal portion of vein R 1, filling the distal third of cell r 1 and the upper half of the distal half of cell r 2+3; vein R 4+5 setulose dorsally to crossvein r-m.

Abdomen. Syntergite 1+2 orange, tergite 3 orange with a narrow median and posterior brown strip, tergite 4 brown with a band of yellowish microtomentum on anterior 4/5 of dorsal and lateral surfaces, tergite 5 dark brown. Sternites 2 to 4 rectangular, sternites 2 to 3 yellow with a median brown spot on posterior margin, sternite 4 with basal half yellow and posterior half brown.

Terminalia. Sternite 5 brown, with a very shallow cleft, not passing the anterior margin of lobe; lobe pointed; posterior arm clubbed, projected posteriorly. Syntergosternite 7+8, epandrium and cercus brown. Cercus elongate and straight, with rounded tip in lateral view ( Fig. 11A ). Cercal prongs parallel with a rectangular tip in dorsal view ( Fig. 11B ). Cercus without setulae on inner lateral margin and with long and thick setae restricted to basal half ( Figs 11 A–B). Surstylus almost triangular, with an elongate projection in posterobasal corner and a rectangular tip; setulae restricted to posterobasal corner and long and fine setae restricted to base ( Fig. 11A ). Pregonite with widened base and narrowed distal portion curved anteriorly, with a conspicuous rounded projection on ventral margin and a row of short and pointed setae on dorsal margin ( Fig. 11C ). Postgonite shorter than pregonite, tapering distally, with pointed tip curved anteriorly and a long seta and some small pointed setae on ventral margin ( Fig. 11D ). Basiphallus conical, curved ventrally ( Fig. 11E ). Distiphallus with rounded apical margin; ventral margin convex with a small finger-like projection ( Fig. 11E ). Vesica elongate and angled, with a triangular projection in basal half and tip with microtrichia ( Fig. 11E ). Inner process of vesica elongate and curved anteriorly ( Fig. 11E ). Lateral and median styli short, of about one-fourth of width of widest portion of lateral wall of distiphallus, and both inserted medially in distiphallus ( Fig. 11E ).

Female. Unknown.

Etymology. The specific epithet is a noun in apposition and refers to the type locality.

Distribution. NEOTROPICAL—Ecuador (Napo).

Remarks. This species shares with N. paraensis , N. tinguensis and N. similis sp. nov. ventral margin of distiphallus bearing a small finger-like projection, but differs from them in having pregonite with a prominent rounded preapical projection on anterior margin ( Fig. 11C ).

Figures

FIGURE 11. Nephochaetopteryx equatoriana sp. nov., male terminalia of holotype (MNRJ). A. Epandrium, surstylus and cercus, left lateral view. B. Cerci, dorsal view (setation omitted on the left side). C. Pregonite, left lateral view; arrow showing rounded projection. D. Postgonite, left lateral view. E. Phallus, left lateral view; arrow showing finger-like projection.Abbreviations: bp = basiphallus; dp = distiphallus; ip = inner process of vesica; ls = lateral stylus; ms = median stylus; ve = vesica. Scale bars: A, B = 0.1 mm; C, D, E = 0.05 mm.