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 Author Amaral, André P. 748F2AF6-F4B3-47D1-B148-16811B9E9B40 Programa de Pós-Graduação em Zoologia, Universidade Estadual de Santa Cruz, Depto. de Ciências Biológicas, CEP 45650 - 000, Ilhéus, Bahia, Brazil. ap.amaral@outlook.com Author Mariano, Rodolfo 5173D6E4-A58A-44F2-BE3D-3BFD875595CF Programa de Pós-Graduação em Zoologia, Universidade Estadual de Santa Cruz, Depto. de Ciências Biológicas, CEP 45650 - 000, Ilhéus, Bahia, Brazil. rmlsilva@uesc.br Author Pinho, Luiz Carlos C9704CD1-918F-4376-ABB6-4DADDFB226FF Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Depto. de Ecologia e Zoologia, CEP 88040 - 901, Florianópolis, Santa Catarina, Brazil. luiz.pinho@ufsc.br text European Journal of Taxonomy 2023 2023-06-14 874 1 1 120 http://zoobank.org/62c858fa-a538-4e0f-b0a1-624e0062f931 journal article 54012 10.5852/ejt.2023.874.2135 a8087ba9-11c2-45e7-9b7e-1c28a2802456 2118-9773 8037742 62C858FA-A538-4E0F-B0A1-624E0062F931 Corethrella ( Corethrella ) flavitibia Lane, 1939 Fig. 23 ; Appendix 1 Material examined BRAZIL – Bahia State • 1 ♀ , adult; Porto Seguro , RPPN Estação Veracel ; 16°18ʹ23ʺ S , 39°06ʹ34ʺ W ; 22 m a.s.l. ; 28 Aug. 2019 ; A.P. Amaral leg.; light pan ; CE-MHS . Description Female adult (n = 1) HEAD. Sensilla ( Fig. 23A ): Ocular row with 1 thick offset seta at ventral part and 12 setae shortly extending posteriorly. Subocular row well-defined, with 11 slender setae; vertex and interocular space without setae. Postgenal row with 15 slender setae ranging from mid-posteriorly to ventromedially. With 2 thick ventromedial setae. THORAX. Sensilla ( Fig. 23B ): Antepronotum with 3 intermediate and 4 slender posteroventral setae. Postpronotum with 1 thick dorsal and 1 more ventral intermediate setae. Scutum, prescutal area with 2 thick and 1 intermediate setae, vertically arranged near prescutal suture; group of 6 thick/intermediate and 4 slender setae anteriorly. Antealar area with 12 thick/intermediate and 6 slender setae clustered on posteroventral portion. Supraalar area with 3 thick setae, with 5 slender setae surrounding. Dorsocentral row, posterior part with group of 5 thick offset setae; about 15 thick/intermediate and 17 slender setae completing the row. Scutellum with 10 thick setae. Posterior anepisternum without setae. Anepimeron with 14 slender setae. Fig. 23. Corethrella flavitibia Lane, 1939 , female adult. A . Cranial setae, anterior and posterior views, and clypeus in anterior view. B . Thoracic setae, lateral view. C . Hind leg claw and empodium, lateral view. WING. R 3 /R 1 : 0.49; R 2+3 /R 2 : 0.93. LEGS. Empodium ( Fig. 23C ) short, slender, with 3 branches. Ta1/Ta2: 2.31; Ta3/Ta4: 1.30. Distribution and biology Corethrella flavitibia is newly recorded both from the state of Bahia and from the Brazilian Northeast region. The single female was collected with a light trap near a brook in the Atlantic forest reserve RPPN Estação Veracel, at an altitude of 4 m a.s.l. It was previously known only from the type locality in São Paulo , Brazil , at an altitude of 85 m a.s.l. ( Borkent 2008 ). Remarks The specimen collected diverged from the description by Borkent (2008) with respect to the number of setae on the posterior portion of the dorsocentral row and by the presence of sensilla coeloconica on flagellomeres II and IX. This variation is accepted for other species and is hence considered intraspecific variation here.