Agenamyia Albuquerque, 1953

Carvalho, Claudio José Barros De, Wolff, Marta, Haseyama, Kirstern Lica Follmann & Fogaça, João Manuel, 2023, Review of the endemic Neotropical genus Agenamyia Albuquerque (Diptera: Muscidae) with the description of new species from South America, Zootaxa 5346 (5), pp. 532-550 : 534-535

Agenamyia Albuquerque, 1953

Type-species. Agenamyia fumipennis Albuquerque, 1953 , by original designation.

Diagnosis. Linear gena and subvibrissal ridge ( Fig. 2B ). Parafacial silvery pruinose. Arista bare. Palpus filiform ( Fig. 8D ). Mid tibia with one median pd seta. Male: Mid tibia with a row of ad setulae. Anterior margin of sternite 5 with a median depression ( Figs. 3A , 9A , and 12A ). Epandrium with two long median setae ( Figs. 3B , 9B , and 12B ). Cerci longer than wide with an inferior branch length ( Figs. 3C , 9C , and 12C ). Female: ovipositor with broad tergites and sternites; epiproct, hypoproct, and cercus highly setulose ( Figs. 4A–C , 10A–C ).

Redescription. Head ( Figs. 2B , 5B , 8B , and 11B ). Dichoptic male. Eyes bare and separated at the level of anterior ocellus by 3.5–4.7 head width. Slightly developed interior ommatidia. Reclinate inner vertical seta, similar in length to the divergent outer vertical seta. Dark-to-light brown frontal vita. Dark-to-light brown parafacial with silver-to-golden pruinosity. Two frontal setae. One fronto-orbital reclinate seta. Fronto-orbital plate with 3–10 setulae in an irregular series. Prestomal tooth developed. Entirely dark brown antennae or with a slightly yellowish pedicel tip. Arista bare. Palpus filiform and entirely dark brown or with a lighter base.

Thorax. Dark brown mesonotum, without stripes or with two slightly distinct median gray stripes. Gray-dusted pleura. Dorsocentral 1+3, first postsutural smaller than or subequal to others. Acrostichals with only the posterior pair differentiated from covering setulae: 1–2 prescutellar setae. Prealar seta absent; two postpronotal setae. One presutural intra-alar seta; 1–2 postsutural intra-alar setae. A strong supralar, similar to post-supra alar. Notopleura with two similar setae and no ground setulae. Scutellum with strong lateral seta, similar to the apical seta. Two proepisternal setae. Lower proepimeral seta weaker than the upper seta and curved downward. Katepisternals 1+1+1 arranged in an equilateral triangle or not. Yellowish halter ( Fig. 11C ).

Wings ( Figs. 7B and 13 ). Clear to smoky. The costal area was usually darker. Wing with veins R 4+5 and M apically parallel. Veins R 2+3, R 4+5, and M apically with or without brown spots. Whitish calypteres. Lower calypter 2–3 times the length of the upper calypter and with a truncated posterior margin ( Fig. 11C ).

Legs. Dark-to-light brown uniformly, or apically black tarsi and femora. Fore femur with a row of complete or incomplete series of pv setae. Mid femur with 1 p and 1 pd setae apically. Mid-tibia with 1 p median seta and row of a fine erected setae extending to tarsus. Hind femur with complete row of ad setae and one apical pd seta. Hind tibia with 3–5 apical av setae and 1 ad median seta. Calcar absent.

Abdomen. Dark brown with syntergite 1+2 and tergite 3 with variable yellowish marks. Sternite 1 bare.

Terminalia. Surstylus with many setulae at the apex. Well-developed postgonite, pregonite, and phallapodeme. Epiphallus with membranous apex.

Female. Similar to male but has some dimorphic characteristics. Moderately long ovipositor with large, unmodified tergites and sternites Three spermathecae. Egg Phaonia - type.

Monophyly. Agenamyia is a monophyletic genus based on the presence of unique muscid characteristics, such as the shape of the gena and a linear peristome ( Couri & de Carvalho 2002). According to Albuquerque (1953), Agenamyia is closely related to Xenomyia Malloch , an Afrotropical genus (Hennig 1965), and Spilogona Schnabl , a genus with species from all regions.

Remarks. The female is unknown for Agenamyia fumipennis and A. timida de Carvalho, Wolff & Fogaça sp. nov.

Figures

FIGURE 2. Agenamyia colombiana de Carvalho, Wolff & Fogaça sp. nov. Male: (A) habitus, lateral; (B) head, frontal; (C) habitus, dorsal. Female: (D) habitus, lateral. Scale bars: (A, C, D) 2 mm, (B) 500 µm.

FIGURE 3. Agenamyia colombiana de Carvalho, Wolff & Fogaça sp. nov., male: sternite 5 and terminalia: (A) sternite 5; (B) epandrium, cercus and surstylus lateral view; (C) cercus, posterior view; (D) terminalia, lateral view; (E) terminalia, frontal view; (F) terminalia, dorsal view. Abbreviations: cerc—cercus, distph—distiphallus, epand—epandrium, epiph—epiphallus, hypd—hypandrium, hyprct—hypoproct, pgt—postgonite, phapod—phallapodeme, pregt—pregonite, sur—surstylus. Scale bars: 0.1 mm.

FIGURE 4. Agenamyia colombiana de Carvalho, Wolff & Fogaça sp. nov., female ovipositor: (A) dorsal view; (B) lateral view; (C) ventral view. Abbreviations: cerc—cercus, epiprct—epiproct, hyprct—hypoproct, st—sternite, tg—tergite. Scale bars: 0.1 mm.

FIGURE 5. Agenamyia exotica de Carvalho & Couri, paratype male: (A) habitus, lateral; (B) head, frontal; (C) habitus, dorsal; (D) female, habitus, lateral. Scale bars: (A, C) 1 mm, (B) 500 µm, (D) 2 mm.

FIGURE 7. Agenamyia fumipennis Albuquerque, holotype male, slides: (A) abdomen; (B) wing; (C) terminalia; (D) epandrium, surstylus, and cercus; (E) sternite V; (F) label; (G) label. Scale bars: 0.5 mm.

FIGURE 8. Agenamyia maculata de Carvalho, Wolff & Fogaça sp. nov., male: (A) habitus, lateral; (B) head, frontal; (C) habitus, dorsal; (D) female, habitus, lateral. Scale bars: (A, C) 1 mm, (B) 500 µm, (D) 2 mm.

FIGURE 9. Agenamyia maculata de Carvalho, Wolff & Fogaça sp. nov., male: sternite 5 and terminalia: (A) sternite 5; (B) epandrium; (C) cercus; (D) terminalia, lateral view; (E) terminalia, frontal view; (F) terminalia, dorsal view. Scale bars: 0.1 mm.

FIGURE 10. Agenamyia maculata de Carvalho, Wolff & Fogaça sp. nov., female ovipositor: (A) dorsal view; (B) lateral view; (C) ventral view. Scale bars: 0.1 mm.

FIGURE 11. Agenamyia timida de Carvalho, Wolff & Fogaça sp. nov., male: (A) habitus, lateral; (B) head, frontal; (C) habitus, dorsal. Scale bars: (A, C) 1 mm, (B) 500 µm.

FIGURE 12. Agenamyia timida de Carvalho, Wolff & Fogaça sp. nov., male: sternite 5 and terminalia: (A) sternite 5; (B) epandrium; (C) cercus; (D) terminalia, lateral view; (E) terminalia, frontal view; (F) terminalia, dorsal view. Scale bars: 0.1 mm.

FIGURE 13. Left wing, dorsal view. (A) Agenamyia colombiana de Carvalho, Wolff & Fogaça sp. nov., male; (B) Agenamyia maculata de Carvalho, Wolff & Fogaça sp. nov., male; (C) Agenamyia timida de Carvalho, Wolff & Fogaça sp. nov., male. Scale bars 1 mm.