Corethrella (Corethrella) munteantaroku 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 : 40-41

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

Fig. 17 ; Appendix 1

Material examined

Holotype

BRAZIL – Amazonas State • 1 ♂, adult; Manaus, Res. Adolpho Ducke , Barro Branco ; 2°55ʹ47ʺ S, 59°58ʹ22ʺ W; 73 m a.s.l.; 4–8 Nov. 2010; Pinho and Mendes leg.; Malaise, “ 100 m acima da ponte” [100 m ahead of the bridge]; INPA.

Description

Male adult (n = 1)

HEAD ( Fig. 17A ). Sensilla: Ocular row with 2 thick offset setae at ventral part, 13 extending little beyond vertex. Subocular row indistinct, interocular space and vertex with few slender setae. Postgenal row with 15 slender setae, from mid-posterior to ventral portions. With 1 thick ventromedial seta.

THORAX ( Fig. 17B ). Sensilla: Antepronotum with 3 slender setae anteriorly located. Postpronotum with 1 thick and 2 slender dorsal setae. Scutum, prescutal area with 7 thick and 3 slender setae clustered on anteroventral portion; 2 thick and 1 intermediate setae more posterodorsally. Antealar area with 11 thick/intermediate and 5 slender setae grouped posteroventrally. Supraalar area with 4 thick setae surrounded by 4 slender setae. Dorsocentral row, posterior part with 8 longitudinally aligned thick setae; additionally, 26 thick/intermediate and 9 slender setae completing the row. Scutellum with 12 thick setae. Posterior anepisternum with 3 slender dorsal setae. Anepimeron bare.

WING. R 3 /R 1: 0.45; R 2+3 /R 2: 0.63.

LEGS. Empodium ( Amaral et al. 2019: 108, fig. 2d) of intermediate length, slender, with two branches. Ta1/Ta2: 2.00; Ta3/Ta4: 1.30.

Distribution and biology

This study examined the holotype of Corethrella munteantaroku Amaral et al., 2019 . From the original description: “This species is known only from the single individual collected with a Malaise trap at the type locality, the Barro Branco stream, in Adolpho Ducke Forest Reserve, Manaus, AM. Barro Branco is a slow flowing, shallow stream, approximately 2m meters wide. It is surrounded by a fragment of Amazon rainforest just outside the limits of Manaus urban area.”

Remarks

Amaral et. al. (2019) described the posterior portion of the dorsocentral row as bearing one thick offset seta. This character is newly interpreted here. For a more detailed discussion, see Morphology remarks below. Corethrella munteantaroku was hypothesized as closely related to C. blanda Dyar, 1928 and C. pallida Lane, 1942 , due to the presence of a wing band and anteromedial spicules on the gonocoxite ( Amaral et al. 2019). Nevetheless, its short, slender, and two-branched empodium is more similar to the ones found in C. alticola , C. amazonica Lane, 1939 , and C. davisi .

Figures

Fig. 17. Corethrella munteantaroku Amaral, Mariano & Pinho, 2019, male adult. A. Cranial setae, anterior and posterior views, and clypeus in anterior view. B. Thoracic setae, lateral view.