Agenamyia maculata 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 : 541-544

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

ZooBank: https://zoobank.org/NomenclaturalActs/ba24f41a-4630-4781-9c38-8966a103f431

( Figs. 8A–D , 9A–F , 10A–C , 13B , 14A, E )

Diagnosis. This species can be easily distinguished from other species of the genus by the following characteristics: vein M has a slight curve before the tip of the wing and an evident cloudy brown spot ( Figs. 8A , 13B ). Ocellar triangle completely silver pruinose (less apparent in females; Fig. 8C ).

Measurements (n=3): Body length = 3.4–3.6 mm. Wing length = 3.3–3.7 mm.

Description. Head. Male. Dark brown fronto-orbital plate with silver pruinosity up to the base of the antenna, 5–6 setulae in an irregular series, 3 stronger. Light brown frontal vita with ocellar triangle, whole silver pruinose. Dark brown fronto-orbital plate with silver pruinosity up to the base of the antenna and 6–7 setulae in an irregular series. Dark brown parafacial and gena, both entirely silver pruinose. Palpus light brown, filiform with a slightly enlarged tip. Dark brown antennae.

Thorax. Dark brown mesonotum with a slightly differentiated median gray stripe. Dorsocentrals 1+3, first postsutural smaller than others. Two postsutural intra-alar setae. Katepisternals 1+1+1 forming an equilateral triangle, anterior seta ½ smaller than the posterior ventral seta ( Fig. 8A ).

Wings. Smoky with veins R 2+3, R 4+5, and M apically with conspicuous cloudy brown spots ( Fig. 13B ). Whitish calypteres. Lower calypter twice as long as the upper calypter.

Legs. Light brown with apical femora and blackish tarsi. Fore femur with row of apical pv setae. Hind femur with three apical av setae. Hind tibia with 3–4 apical av setae.

Abdomen. Dark brown, with syntergite 1+2 and 3 distinguishably yellowish. Eight setae on apical half of each side of sternite 5.

Terminalia ( Figs. 9B–F ). Cercus was divided into two parts but fused at the base, longer than wide, and with an almost parallel apex, with many setulae distributed at the base middle ( Figs. 9B–C ). Surstylus shorter than cercus ( Fig. 9B ). Hypandrium tubular ( Fig. 9D ). The phallapodeme has approximately the same diameter across its entire extension and is slightly curved at the apex ( Figs. 9D–F ). Pregonite is smaller than postgonite; postgonite has a membranous apex. Epiphallus larger than postgonite. Short and rectangular distiphallus with membranous apex ( Figs. 9D–F ).

Measurements (n=3): Body length = 3.3–3.8 mm. Wing length = 3.3–3.6 mm.

Female. Similar to male. Wings smoky, but without spots. Dark brown legs; hind femur with only one median av seta in apical half.

Ovipositor ( Figs. 10A–C ). Tergite 6 is divided longitudinally; tergite 7 is large and divided longitudinally; tergite 8 is large and divided longitudinally, touching the epiproct. Sternite 6 is undivided and covered with many setulae; sternite 7 is undivided and covered with many setulae; sternite 8 is divided, reduced, and covered with a few setulae. Epiproct with many strong setae. Large, very setulose hypoproct. Cercus with many long setae. Three spermathecae.

Material examined. Holotype ♁. “CO [ Colombia] 05. El Retiro / Quebrada La Cebolla, 2150 msnm [altitude] / T. [trampa=trap] Emergencia / Feb. [February] 9-1984, M. Wolff / CEUA, 38262 [handwriting]”; “ Holotype [red label]”; Agenamyia / maculata / Claudio J. B. de Carvalho det. 2023 [handwriting]”.

Paratypes. 4 ♀. COLOMBIA, El Retiro: labeled as Holotype, 13.iv.1983, 38259 ( CEUA), same data, 9.ii.1984, 38260, 1 ♀ ( CEUA), same data, 38261, 1 ♀ ( CEUA), same data, 38265, 1 ♀ ( CEUA); Sopetrán ( Quebrada La Jiménez ), 780 msnm, 22. vi. 1983, M. Wolff, 1 ♁ ( DZUP); El Retiro (Quebrada La Cebolla), 2150, 13.x.1983, 1 ♁, M. Wolff, ( CEUA) .

Etymology. The epithet, maculata , refers to dark spots on the male wing.

Distribution. Antioquia, Colombia.

Biology. The larvae are aquatic.Adult specimens were collected in El Retiro at an altitude of 2150 m (extremely humid lower montane forest - bmh-MB) and in Sopetrán at an altitude of 780 m (tropical dry forest - bs-T) ( Holdridge, 1967).

Remarks. The holotype is in good condition. Some male specimens had yellowish femora. Pérez & de Carvalho (2016: 25) indicated this species as a morphospecies Agenamyia sp. 3 .

Figures

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 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).