Argentinomyia quimbaya Montoya & Wolff, 2020

Montoya, Augusto L. & Wolff, Marta, 2020, Description of six new large species of Argentinomyia Lynch-Arribalzaga, 1891 and redescription of Talahua fervida (Fluke, 1945) (Diptera, Syrphidae, Syrphinae), ZooKeys 929, pp. 19-51 : 19

Argentinomyia quimbaya Montoya & Wolff sp. nov. Figures 8 , 9 , 15

Differential diagnosis.

Legs extensively yellow. Tegula yellow pilose and the halter entirely yellow. Abdomen with four pairs of lateral broad yellow maculae. Argentinomyia quimbaya sp. nov. is similar in appearance to Argentinomyia andina sp. nov., but in A. andina sp. nov. the legs are extensively brown, metafemur only slightly orange on apical 1/6. Tibiae yellow with a dark ring near the middle. Fifth tergum with a pair of small maculae in the basal corners (see 'diagnostic features’ under each species or key).

Type locality.

Colombia, department of Caldas, Manizales municipality, Corregimiento Las Palmas, Parque Rio Blanco, 5°5.017'N, 75°25.133'E, 2782 m a.s.l.

Description.

Male. Head (Fig. 8A, C ). Black, covered with yellowish gray pollinosity, shining black on the prominent round tubercle, oral tips, ocellar triangle, and a large triangular macula on the front; pile on front black, on gena and face yellow, on ocellar triangle black, on the occiput yellow except the dorsal pile, which are black. Antennae brown, orange-red ventrally, oval, longer than wide pedicel and the lower basal corner of basoflagellomere, long, ratio 1.0:1.2:3.1, arista orange, dark brown toward the tip. Thorax (Fig. 8C ). Black, the scutum shining, covered with coppery pollen and short golden pile with many long black hairs that appear yellowish at the base; these hairs become longer posteriorly and longer on the scutellum, fringe of scutellum yellow; pleura yellow pollinose and pilose. Wing (Fig. 8C ). Smoky; the stigma brown yellowish; membrane microtrichose, except for extensive bare areas on basal half (cells c, sc, r1, dm, and bm); tegula yellow pilose, basicosta yellow pilose, alula extensively bare, calypter and plumule yellow; halter entirely yellow. Legs (Fig. 8B ). Yellow, protarsi 1 yellow, 2-4 brown, 5 yellow, mesotarsi 1-2 yellow, 3-4 black, 5 yellow, metatarsi yellow. Abdomen (Fig. 8B ). Elongate, black, with four pairs of lateral yellow maculae; first tergum shining, laterally yellow, second tergum with the broad lateral yellow maculae reaching the segment apex, third tergum with wide rectangular lateral maculae, which are apically rounded and reach the apical 6/7 of the segment, fourth tergum with still wider but less elongate maculae, reaching only ½ of the segment length. Pile yellow on the sides basally, black down the middle and on the apical terga. Male genitalia as Fig. 9 .

Female. (Fig. 8D-F ). Similar to male except for normal sexual dimorphism. Abdominal maculae are comparatively wider than in the male. Front narrow above, not the much wider than the ocellar triangle, shining above with pollinose transversal maculae below; legs extensively yellow.

Length (N = 2). Body 11.8-12.3 mm; wing 11.5-11.9 mm.

Etymology.

The specific epithet quimbaya (noun in the genitive case) refers to the indigenous people who inhabit the Central Cordillera of the Colombian Andes in pre-Colombian times, between the departments of Caldas and Risaralda. The name also refers to the Flora and Fauna Sanctuary (SFF, acronym in Spanish) Otún Quimbaya, where part of the type series was collected.

Distribution.

Argentinomyia quimbaya sp. nov. (N = 2) is distributed on the western slope of the Central Cordillera of Colombia (in two very neighbouring Andean states, Caldas and Risaralda) at an elevation between 2700 to 2782 m. a.s.l. in the provinces of Cauca (Fig. 15 ).

Type material.

Holotype. COLOMBIA ♂, Colombia, Caldas, Manizales, Corregimiento Las Palmas, Parque Rio Blanco. Original label: "Colombia, Caldas, Manizales, Corregimiento Las Palmas / Parque Rio Blanco, 5°5.017'N, 75°25.133'E, 2782 m a.s.l. / Net, 18.ii.2006, Leg. B.J. and F.C. Thompson (USMN ENT 000035733 )". "HOLOTYPE / Argentinomyia quimbaya / Montoya & Wolff 2019 [red, handwritten except first line]". The holotype is in good condition and deposited at the USMN in Washington D.C., USA. Paratype. COLOMBIA • 1 ♀, Risaralda, Otún Quimbaya, Peña Bonita, El Jordán 4°44.617'N, 75°31.494'E, 2640-2800 m a.s.l., Van Sommeren-Rydon- Chicken entrails, 13-14.iv.2011, N. Uribe (CEUA 87109).

Figures

Figure 8. Argentinomyia quimbaya sp. nov., male (USMN ENT 000035733): A head, frontal, male B dorsal view C lateral view. Female, Paratype (CEUA 87109): D head, frontal view E dorsal view F lateral view. Scale bars: 5 mm.

Figure 9. Argentinomyia quimbaya sp. nov., male genitalia: A whole genitalia including epandrium, cercus, and surstylus, lateral view B epandrium, dorsal view C hypandrium, ventral view. Scale bar: 0.05 mm.

Figure 15. Biogeographical distribution of Argentinomyia andina sp. nov. (yellow), A. quimbaya sp. nov. (blue) and A. choachi sp. nov. (red).