Agenamyia colombiana de Carvalho, Wolff & Fogaça, 2023

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 : 535-538

Agenamyia colombiana de Carvalho, Wolff & Fogaça sp. nov.

ZooBank: https://zoobank.org/NomenclaturalActs/867c26d6-1eab-4825-b931-84b5b96e9d36

( Figs. 2A–D , 3A–F , 4A–C , 13A , 14A, B )

Diagnosis. Males had a slight prolongation of the wing membrane between R 2+3 and R 4+5 and a strong prolongation between R 4+5 and M veins ( Fig. 13A ); females with less developed prolongation. Dark brown femora. Hind femur with two av setae, the apical stronger.

Measurements (n=5): Body length = 3.3–4.4 mm. Wing length = 3.8–4 mm.

Description. Male. Head. Dark brown fronto-orbital plate with silvery pruinosity near the base of the antenna and 3–4 setae in an irregular series. Frontal vitta dark brown. Dark brown parafacial and gena, former with silvery pruinosity. Brown palpus with lighter tip. Dark brown antennae, pedicel lighter than the remaining structures. Dark brown arista.

Thorax. Dark brown mesonotum with two slightly differentiated median grey stripes. Dorsocentrals 1+3, first postsutural 1/3 smaller than the others. One postsutural intra-alar seta. Katepisternals 1+1+1 arranged in an equilateral triangle; anterior katepisternal seta 2/3 smaller than the posterior ventral seta.

Wings. Smoky. Dark brown veins. Veins R 2+3, R 4+5, and M apically with brown spots in males ( Fig. 13A ). A slight prolongation of the wing membrane between R 2+3 and R 4+5 and a strong prolongation of the wing membrane between R 4+5 and M veins ( Fig. 13A ). Whitish calypteres. Lower calypter three times the length of the upper calypter ( Fig. 2A ).

Legs. Dark brown. Fore tibia with a row of posteroventral setae on apical half. Hind tibia with 4–5 anteroventral setae on apical half.

Abdomen. Dark brown with syntergite 1+2 and tergite 3, yellowish in part ( Fig. 2A ). Sternite 5 has four setae on the apical half of each side ( Fig. 3A ).

Terminalia ( Figs. 3B–F ). Cercus is divided and longer than wide, with divergent apex; cercus covered by many setulae, mainly at the base and middle, with one longer median seta ( Figs. 3B–C ). Surstylus shorter than cercus ( Fig. 3B ). Hypandrium tubular ( Fig. 3D ). The phallapodeme had the same diameter across its entire extension and was slightly curved at the apex ( Figs. 3D–F ). Pregonite smaller than postgonite. Postgonite with membranous apex. Epiphallus longer than postgonite. Rectangular distiphallus with membranous apex ( Figs. 3D–F ).

Female ( Fig. 2D ). Measurements (n=5): Body length= 4.2–4.4 mm. Wing length= 3.6–4.12 mm.

Similar to males, membrane prolongation was less developed in lighter wings. The median gray stripes in the mesonotum were not visible in females. The first post-sutural dorsocentral seta smaller than the others.

Ovipositor ( Figs. 4A–C ). Tergite 6 was not divided longitudinally, tergite 7 was large and divided longitudinally, and tergite 8 was reduced and divided longitudinally, touching the epiproct. Sternite 6 and 7 were undivided and covered with a few setulae; sternite 8 was divided longitudinally, reduced, and covered with few setulae. Epiprocts had one pair of strong setae. Large, very setulose hypoproct. Cercus with several setae. Three spermathecae.

Material examined: Holotype ♁, “CO [ Colombia] 05. Envigado / Quebrada La Ayurá, 1750 msnm [altitude] / T. [trampa=trap] Emergencia / Feb. [February] 17-1984, M. Wolff / CEUA, 38255 [handwriting]”; “ Holotype [red label]”; Agenamyia / colombiana / Claudio J. B. de Carvalho det. 2023 [handwriting]”.

Paratypes. Labelled as Holotype, except vi–viii. 1983, 1 ♁ ( CEUA, 38257); 28.iv.1983, 1 ♁ ( CEUA, 38258); 17. ii. 1984, 1 ♁ (38256) ( DZUP) .

Additional material examined. Same data as Holotype: 7 ♁ 19 ♀ ( CEUA) ; 4–7. viii. 1983, 37 ♁ 35 ♀ ( CEUA) , 1 ♁ 1 ♀ (IAvH); 8. viii. 1983, 4 ♁ 1 ♀ ( CEUA) ; 22. vii. 1983, 1 ♁ ( CEUA) ; 10. i. 1983, 4 ♀ ( CEUA) ; 15. xi. 1983, 1 ♁ ( CEUA) ; 22. xii. 1983, 1 ♁ ( CEUA) ; El Retiro, ( Quebrada La Cebolla ), 2150 msnm , 7. v. 1983, 1 ♁ 1 ♀ ( CEUA) .

Etymology. The epithet colombiana refers to Colombia, the country of the type locality.

Distribution. Antioquia, Colombia.

Biology. The larvae are aquatic.Adult specimens were collected from Envigado at an altitude of 1750 m, the La Ayurá ravine (Premontane humid forest – bh-PM) ( Holdridge 1967).

Remarks. The holotype is in good condition, and the foreleg is broken but glued to the specimen. The prolongation of the wing membrane between R 2+3 and R 4+5 and the strong prolongation between the R 4+5 and M veins ( Fig. 13A ) are unique among all Neotropical muscid species. Pérez & de Carvalho (2016:25) indicated this species as a morphospecies Agenamyia sp. 1 .

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 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.

FIGURE 14. Geographic distribution of Agenamyia species. (A) all species; (B) A. colombiana (black square); (C) A. exotica (blue square); (D) A. fumipennis (yellow square); (E) A. maculata (red square); (F) A. timida (green square). Biogeographic provinces of the Neotropical region (Morrone et al. 2021):Atlantic province (blue region), Cauca province (light brown region), Guatuso-Talamanca province (dark brown region), Magdalene province (green region).