Nephochaetopteryx inca, 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 : 34-36

Nephochaetopteryx inca sp. nov.

( Fig. 14 )

Type material. HOLOTYPE ♁ ( MNRJ): PERU / Tingo Maria / Río [= River] Huallagá / 670m Leg. / W. Weyrauch [printed on rectangular white label]. [Holotype in good condition, with cleared and shrunken terminalia preserved in glycerin in a microvial pinned beneath the specimen.]

Description. Male (holotype). Length = 5.3 mm.

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

Thorax. Chaetotaxy: dorsocentrals 2+4; intra-alars 2+2; supra-alars 1+3, anepisternals 4; merals 6. Mid femur with two median setae and with a differentiated posteroventral seta. Ctenidium consisting of three 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. Tergites brown with a band of grayish microtomentum on anterior 4/5 of dorsal and lateral surfaces. Sternites 2 to 4 rectangular, sternite 2 yellow with a median brown strip broadened posteriorly, sternites 3 and 4 brown; sternite 4 with a median patch of thick setae on posterior margin.

Terminalia. Sternite 5 brown, wider than long with short and long setae; cleft deep; lobe short and rectangular; arm elongate, with rounded apex ( Fig. 14E ). Cercus short, shorter than epandrium, tapering distally, with rounded tip bent posteriorly ( Fig. 14A ). Cercal base with long and thick setae and without setulae on outer lateral margin basally and on distal one-third ( Fig. 14A ). Cercal prongs with distal halves parallel in dorsal view ( Fig. 14B ). Surstylus glossiform, with a finger-like projection on posterobasal corner ( Fig. 14A ). Pregonite shorter than postgonite, with pointed apex and distal half perpendicular to base; anterior margin with a prominent projection; posterior margin convex with small pointed setae ( Fig. 14C ). Postgonite elongate, with posterior margin sinuous and a narrowed and pointed apex, gently curved anteriorly; anterior margin with one long seta (longer than postgonite) and few minute and pointed setae ( Fig. 14D ). Basiphallus short, about half as long as distiphallus, T-shaped in lateral view ( Fig. 14F ). Distiphallus with apical margin rounded, corrugated medially ( Fig. 14F ). Ventral margin of distiphallus serrated ( Fig. 14F ). Vesica angled, with distal portion tapering distally and a hook-shaped tip, in lateral view ( Fig. 14F ). Vesica with a rounded process medially ( Fig. 14F ). Inner process of vesica with distal portion rectangular ( Fig. 14F ). Lateral and median stylus very short, of about one-third of width of widest portion of lateral wall of distiphallus, and both inserted medially in distiphallus ( Fig. 14F ).

Female. Unknown.

Etymology. The species is named after the Incan culture, which was prevalent in Peru during the pre-Hispanic age. The specific epithet should be treated as a noun in apposition.

Distribution. NEOTROPICAL—Peru (Huánaco).

Remarks. This species is similar to N. molinai in the shape of the cercus, distiphallus and gonites and differs from it in having lobe of sternite 5 short and rectangular; vesica with hook-shaped tip in lateral view and apical margin of distiphallus corrugated. In N. molinai the lobe is glossiform; the tip of the vesica is not hook-shaped and the apical margin of the distiphallus is not corrugated.

Figures

FIGURE 14. Nephochaetopteryx inca 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. D. Postgonite, left lateral view. E. Sternite 5, ventral view (setation omitted on the right side). F. Phallus, left lateral view; arrow showing corrugated apical margin. Abbreviations: bp = basiphallus; dp = distiphallus; ip = inner process of vesica; ls = lateral stylus; ms = median stylus; ve = vesica. Scale bars: A, B, E = 0.1 mm; C, D, F = 0.05 mm.