Corethrella (Corethrella) amazonica Lane, 1939

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 : 46-47

publication ID 10.5852/ejt.2023.874.2135

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Corethrella (Corethrella) amazonica Lane, 1939


Corethrella (Corethrella) amazonica Lane, 1939 View in CoL View at ENA

Fig. 20 View Fig ; Appendix 1

Material examined

BRAZIL – Bahia State • 4 ♀♀, adults; Maraú, Cassange ; 13°59ʹ16ʺ S, 38°57ʹ03ʺ W; 13 m a.s.l.; 28 Sep. 2019; A.P. Amaral leg.; CDC trap; CE-MHS GoogleMaps 1 ♀, adult; Ilhéus, Cabruca da UESC ; 14°47ʹ37ʺ S, 39°10ʹ25ʺ W; 35 m a.s.l.; 16 Jul. 2019; A.P. Amaral leg.; F call trap ( Boana faber ); CE-MHS GoogleMaps 1 ♀, adult; Uruçuca, PESC , “Fundos da sede” [behind park lodge]; 14°29ʹ40ʺ S, 39°08ʹ23ʺ W; 970 m a.s.l.; 31 Oct. 2016; V.A. Silva et al. leg.; light pan; CE-MHS GoogleMaps 1 ♀, adult; Porto Seguro, RPPN Veracel , mussununga ; 16°21ʹ33ʺ S, 39°08ʹ15ʺ W; 72 m a.s.l.; 12 Mar. 2020; A.P. Amaral leg.; frog-call trap (chorus); CE-MHS GoogleMaps .


Female adult (n = 7)

HEAD. Sensilla ( Fig. 20A View Fig ): Ocular row with 2 thick offset setae at ventral part, 10–13 extending posteriorly. Subocular row weakly defined anteriorly, with 14–20 slender setae; vertex and interocular space with several slender setae. Postgenal row with 20–27 slender setae ranging from mid-posteriorly to ventromedially. With 1 thick ventromedial seta.

THORAX. Sensilla ( Fig. 20B View Fig ): Antepronotum with 2–3 intermediate anterodorsal setae and 0–5 more ventral setae on anterior margin. Postpronotum with 1–2 thick dorsal and 3–6 slender setae. Scutum, prescutal area with 3 thick setae vertically arranged near prescutal suture, with 6–9 slender setae surrounding; group of about 4–5 thick/intermediate and 4–6 slender setae anteriorly, merging with anterior portion of dorsocentral row. Antealar area with 9–12 thick/intermediate and 6–8 slender setae clustered on posteroventral portion. Supraalar area with 2–3 thick setae, with 5–14 slender setae surrounding. Dorsocentral row, posterior part with group of 6–7 thick offset setae longitudinally aligned; 15–27 thick/intermediate and about 20–40 slender completing row. Scutellum with 9–12 thick setae. Posterior anepisternum with 0–4 slender dorsal setae. Anepimeron bare.

WING. R 3 /R 1: 0.66 (0.63–0.69); R 2+3 /R 2: 0.36 (0.32–0.43).

LEGS. Empodium ( Fig. 20C View Fig ) short, slender, with 2 branches.

Distribution and biology

This is the first record of Corethrella amazonica both from the state of Bahia and from the Brazilian Northeast region. Specimens studied were collected via a light trap and a frog-call pan trap playing the calls of Physalaemus cuvieri , P. signifer (Girard, 1853) and Boana faber . Sampled locations were in the Atlantic forest area: a coastal lake, a white-sandy tropical savanna (mussununga), and a small stream in a forested area. Altitudes range from 13 to 210 m a.s.l.

This species is otherwise known from suthern Mexico, Nicaragua, Costa Rica, Colombia, Trinidad and Tobago, Guyana, French Guiana, and the Brazilian states of ES, PA, RO, SC, and SP, at altitudes ranging from 0 to 500 m a.s.l. ( Borkent 2008; Amaral et al. 2019).


The number of setae on the posterior portion of the dorsocentral row is here differently interpreted than in Borkent (2008). See Morphology remarks.













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