Agenamyia andaki Ramos-Pastrana & Córdoba-Suarez, 2025

Ramos-Pastrana, Yardany & Córdoba-Suarez, Eric, 2025, A new species of Agenamyia Albuquerque (Diptera: Muscidae) from Andean Amazon, Colombia, Zootaxa 5660 (3), pp. 426-434 : 428-433

Agenamyia andaki Ramos-Pastrana & Córdoba-Suarez sp. nov.

( Figs 1–5)

Diagnosis. Male. The first postsutural one third smaller than the others; wing ( Fig. 1E) smoky, with large dark brown spot on apical half. A. andaki sp. nov. differs from A. timida by antenna entirely dark brown; posterior katepisternal seta longer than anterior; wing with large dark brown spot on apical half ( Fig. 1E); tergite 3 entirely dark brown ( Fig. 1B); and differs from the others Agenamyia species by Distph large and rounded, mostly membranous in lateral view ( Figs 3A–B).

Measurements. Male. Body length: 3.7 mm. Wing length: 3.6 mm (holotype).

Description. Male. Head ( Figs 1A–C). Fronto-orbital plate dark brown to black, with silvery pruinosity near the base of the antenna, yellowish near to apex of the antenna and a row of 3 black and stout setae. Frontal vitta dark brown. Parafacial dark brown, with yellowish pruinosity; gena dark brown, with silvery pruinosity. Palpus brown. Antenna dark brown, postpedicel lighter the remaining structures; arista dark brown.

Thorax ( Figs 1A–B, D). Mesonotum dark brown to black, with brown pruinosity, except postpronotal lobe and notopleuron gray yellowish. Dorsocentrals 1+3, first postsutural one third smaller than the others. Three postsutural intra-alar setae. Katepisternals 1+1+1 arranged in an equilateral triangle; posterior katepisternal seta about three times longer than the others.

Wing ( Fig. 1E). Smoky, with large dark brown spot in apical half. Dark brown veins ( Fig. 1E). Whitish calypteres. Lower calypter three times the length of the upper calypter.

Legs ( Figs 1A–B). Yellowish, except femoral-tibial articulations which are darker, tarsi and claws black. Fore femur with a row of setae pd and v, the pd shorter and thicker than v; mid femur with a row setae a and two black and stout pd setae apically; hind femur with a row of black and long a setae, three av setae on apical half and three black and long v setae medially; fore tibia with one black, long and stout d seta apically; mid tibia with one black, long and stout p seta medially; hind tibia with one black, long and stout ad seta medially and a row of three v medially.

Abdomen ( Figs 1A–B, F). Yellowish, with syntergite 1+2, tg 3 and 5 partially dark brown forming a dorsal stripe centrally, tg 4 entirely dark brown ( Fig. 1F). St 5 subsymmetrical, subdivided on proximal margin, with scattered setae on medial part and distal margin ( Figs 2A–B).

Terminalia ( Figs 2C–F, 3A–F). Epand rectangular on dorsal view, with scattered setae dorsally on upper margin ( Figs 2C–D). Cerc is divided and longer than wide, with divergent apex; covered by few setulae in inner margin medially (Figs E–F). Sur shorter than cerc, with short setae apically ( Figs 2C–D). Hypd longer than wide, with ventral and distal margins straight, proximal and dorsal margins sinuous in lateral view ( Figs 3A–B). Phapod homogeneous in diameter, only slightly wider in the apical ½, with sharp apices in lateral view ( Figs 3A–B); inverted Y-shaped in ventral and dorsal view ( Figs 3C–F). Pregt as long as pgt ( Figs 3A–F). Pgt curved, with wide base and slightly membranous apex ( Figs 3A–B). Epiph slightly longer and thinner than pgt, with membranous apex in lateral view ( Figs 3A–B). Distph large rounded, mostly membranous in lateral view ( Figs 3A–B).

Female ( Figs 4A–F). Measurements (n=3): Body length= 4.4–4.5 mm. Wing length= 3.5–3.6 mm. Similar to males, except, tg 3 with a dark brown band on distal margin not visible in males ( Fig. 4A, C), tg 4 not entirely dark brown, with two yellowish spots on proximal margin ( Fig. 4A, C).

Ovipositor ( Figs 3C–E). Tergite 6 divided longitudinally, tergite 7 large and divided longitudinally, and tergite 8 reduced and divided longitudinally, not touching the epiproct. Sternite 6 and 7 divided and with setulae on distal margin; sternite 8 divided longitudinally, reduced, and covered with few setulae. Epiprocts with one pair of strong setae and two pairs of tiny setae. Hypoproct large and very setulose. Cercus thin, elongated, with several long setae.

Type material. HOLOTYPE ♂: COLOMBIA, Caquetá, Belén de los Andaquíes Vda.[Vereda] La Resaca, Parque Natural Municipal La Resaca , 01º26′04″N / 75º52′44″W, 332 m, 6–8. Jun [ VI].2023, Y. Ramos-Pastrana Leg. (1 ♂ LEUA-70558) (photographed specimen) / Captura con trampa Malaise sobre ecosistema acuático en bh-T [Bosque húmedo tropical] (Vegetación secundaria) . PARATYPES. idem (1 ♂ LEUA-70559) ; idem (1 ♂ LEUA-70560) ; idem (1 ♂ LEUA-70561) ; idem (1 ♂ LEUA-70562) ; idem (1 ♂ LEUA-70563) ; idem (1 ♀ LEUA-70564) (photographed specimen) ; idem (1 ♀ LEUA-70565) ; idem 28–30.Mar [ III].2023 (1 ♂ LEUA-70566) ; idem (1 ♂ LEUA-70567) ; idem (1 ♂ LEUA-70568) ; idem (1 ♀ LEUA-70569) .

Etymology. The epithet andaki refers to the name of the Andakí indigenous ethnic group that inhabited the region of the type locality. The name is to be treated as a noun in apposition.

Geographical distribution. Colombia (Caquetá, Belén de los Andaquíes) ( Fig. 5A).

Habitat. The specimens were collected in a creek in the Tropical Rainforest with dense secondary vegetation in the Andean-Amazonian transition corridor of Colombia (Corpoamazonia & Ecointegral Ltda 2007) ( Fig. 5B).

Remarks. The holotype is in good condition, and the hind leg is broken but glued to the specimen, right wing mounted on microslide with Canada balsam, terminalia was dissected and placed in a microvial with glycerin, all pinned along with the specimen.

Agenamyia andaki sp. nov. is the first species with distribution in the Amazon region, although A. diversa has as type-locality a region that is in the Andean-Amazon transition, its geographical distribution is Andean like the other species of Agenamyia known in Colombia and according to the biogeographic regionalization proposed by Morrone et al. (2022) it is found in the Páramo province. Agenamyia andaki sp. nov. type-locality is in an area also belonging to the Andean-Amazonian transition; however, this area is already part of the Amazon region, exactly in the lower Amazonian piedmont in the department of Caquetá where the tropical rainforest predominates. According to Morrone et al. (2022) this type-locality is exactly on the border of the Páramo and the Napo provinces. We believe that if collections are increased in this area and in the Amazonian plains it is likely that more species of Agenamyia still unknown will be collected.