Corethrella (Corethrella) xokleng Amaral, Mariano & Pinho, 2019

Amaral, André P., Mariano, Rodolfo & Pinho, Luiz Carlos, 2023, Description of five new species of frog-biting midges (Diptera, Corethrellidae) from Brazil and examination of new morphological characters with utility for taxonomic and phylogenetic studies, European Journal of Taxonomy 874 (1), pp. 1-120 : 31-32

Corethrella (Corethrella) xokleng Amaral, Mariano & Pinho, 2019 Fig. 13 ; Appendix 1

Material examined

Holotype

BRAZIL – Santa Catarina State • 1 ♂, adult; Grão Pará, Rio Três Barras ; 28°12ʹ44ʺ S, 49°27ʹ28ʺ W; 15 Nov. 2012; L.C. Pinho, L.S. Gomes and A.L. Schlindwein leg.; light trap; MZUSP.

Allotype

BRAZIL – Santa Catarina State • 1 ♀, adult; same collection data as for holotype, except Rio Braço Esquerdo ; 28°09ʹ01ʺ S, 49°21ʹ21ʺ W; 16 Nov. 2012; MZUSP.

Paratype

BRAZIL – Santa Catarina State • 1 ♀, adult; same collection data as for allotype; CE-MHS.

Description

Male and female adults (1 ♂, 2 ♀♀)

HEAD ( Fig. 13A ). Sensilla: Ocular row with 2 thick slightly offset setae at ventral portion, more dorsally about 15 setae extending to mid-posterior portion of head. Subocular row not well-defined anteriorly, with about 10 slender posterior setae. Vertex with a few additional setae. Postgenal row with about 12 slender setae ranging from posterior end of ocular row to ventromedially. With 3 thick ventromedial setae.

THORAX ( Fig. 13B ). Sensilla: Antepronotum with 3–4 slender lateral setae. Postpronotum with 1–2 thick and 2–5 intermediate/slender dorsal setae. Scutum, prescutal area with about 8–13 thick and 8–12 slender setae dorsally located, difficult to distinguish from anterior portion of dorsocentral row. Antealar area with 1 anterodorsal seta, 3–5 thick ventral setae, and 24–34 intermediate/slender setae spread from ventral to dorsal portions, reaching dorsocentral row. Supraalar area with 3 thick central setae, with 8–12 slender setae surrounding. Dorsocentral row, posterior part with 3 thick and 1–2 intermediate offset setae; about 20–25 thick and 24–30 slender setae filling the row. Scutellum with 6–7 thick setae. Posterior anepisternum with 4–5 slender dorsal setae. Anepimeron with 1 intermediate and 0–1 slender setae.

WING. Male R 3 /R 1: 0.41; R 2+3 /R 2: 1.14. Female R 3 /R 1: 0.57–0.58; R 2+3 /R 2: 0.48–0.49.

LEGS. Empodium ( Amaral et al. 2019: 112, fig. 4e) elongate and thick, with 9–10 branches. Male Ta1/ Ta2: 2.92; Ta3/Ta4: 1.29. Female Ta1/Ta2: 3.21–3.25; Ta3/Ta4: 1.00–1.22.

Distribution and biology

The examined specimens belong to the type series described by Amaral et al. (2019): “This species is known from three individuals (two females and one male) collected in light traps from type locality, Serra Furada State Park, in Grão Pará, SC, at elevations of 355– 354 m. Serra Furada is a region of Atlantic forest, interspersed with large areas of Eucalyptus cultivation, near the transition to Araucaria Forest at higher altitudes. The rivers where traps were set are gravel-bed streams, 4–6 m wide and about 1 m deep.”

Figures

Fig. 13. Corethrella xokleng Amaral, Mariano & Pinho, 2019, adult. A. Cranial setae, anterior and posterior views, and female clypeus in anterior view. B. Thoracic setae, lateral view.