Corethrella (Corethrella) amabilis Borkent, 2008

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 : 55-56

Corethrella (Corethrella) amabilis Borkent, 2008

Fig. 25 ; Appendix 1

Material examined

BRAZIL – Santa Catarina State • 1 ♀, adult; Santo Amaro da Imperatriz, Plaza Caldas ; 27°44ʹ31ʺ S, 48°48ʹ06ʺ W; 470 m a.s.l.; 1 Apr. 2013; A. Ambrozio-Assis leg.; frog-call trap ( Physalaemus cuvieri ) 1ª3; CE-MHS .

Description

Female adult (n = 1)

HEAD. Sensilla ( Fig. 25A ): Ocular row with 1 thick offset seta at ventral portion, about 15 setae shortly extending posteriorly. Subocular row poorly defined anteriorly, with 4 slender setae on posterior portion; vertex and interocular space with a few scattered slender setae. Postgenal row with 6 slender setae ranging from mid-posterior portion to ventromedially. With 2 ventromedial thick setae.

THORAX. Sensilla ( Fig. 25B ): Antepronotum with 9 slender lateral setae. Postpronotum with 1 thick dorsal and 4 slender setae more posteriorly. Scutum, prescutal area with 2 thick and 1 intermediate, vertically aligned setae near prescutal suture; 8 intermediate and 4 slender setae anteriorly, merging with anterior portion of dorsocentral row. Antealar area with 9 thick, 4 intermediate and 6 slender setae centrally located; 8 slender setae more dorsally, near dorsocentral row. Supraalar area with 1 thick and 2 intermediate setae anteroposteriorly aligned, 11 slender setae surrounding. Dorsocentral row, posterior region with 3 thick and 1 slender offset setae; about 27 thick/intermediate and 14 slender setae filling row. Scutellum with 10 thick setae. Posterior anepisternum without setae. Anepimeron with 15 slender setae.

WING. R 3 /R 1: 0.59; R 2+3 /R 2: 0.57.

LEGS. Empodium ( Fig. 25C ) short, slender, with 3 branches. Ta1/Ta2: 2.87; Ta3/Ta4: 1.10.

Distribution and biology

The single specimen examined was previously recorded by Ambrozio-Assis et al. (2018). It was collected via frog-call trap playing the call of Boana bischoffi , in Santa Catarina State, in an area of Atlantic forest, at an altitude of 470 m a.s.l.

This species is otherwise known only from Costa Rica, at altitudes ranging from 1800 to 1850 m a.s.l. ( Borkent 2008).

Figures

Fig. 25. Corethrella amabilis Borkent, 2008, 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.