Corethrella (Corethrella) pillosa 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 : 58-59

Corethrella (Corethrella) pillosa Lane, 1939

Fig. 27 ; Appendix 1

Material examined

BRAZIL – Santa Catarina State • 1 ♀, adult; Bom Retiro, RPPN Grande Floresta das Araucárias , “ Riacho do paredão ” [stream by the scarp]; 27°53ʹ48ʺ S, 49°26ʹ14ʺ W; 960 m a.s.l.; 18 Nov. 2017; L.C. Pinho et al. leg.; CDC trap; CE-MHS • 1 ♀, adult; same collection data as for preceding, except “ Brejo alojamento ” [marsh near lodge]; 27°53ʹ59ʺ S, 49°25ʹ24ʺ W; 17 Nov. 2017; CE-MHS • 1 ♀, adult; Grão Pará, Parque Estadual Serra Furada , CAPEA stream ; 28°11ʹ26ʺ S, 49°23ʹ30ʺ W; 6 Apr. 2013; L.C. Pinho, A.L. Schlindwein, and A.P. Amaral leg.; frog-call trap ( Scynax perereca ); CE-MHS • 1 ♀, adult; Porto Belo, Ponta do Araçá ; 27°07ʹ38ʺ S, 48°31ʹ20ʺ W; 115 m a.s.l.; 25 Apr. 2012; L.C. Pinho leg.; Shannon; CE-MHS • 1 ♀, adult; Santo Amaro da Imperatriz, Plaza Caldas ; 27°44ʹ31ʺ S, 48°48ʹ26ʺ W; 426 m a.s.l.; 23 Apr. 2013; A. Ambrozio-Assis leg.; frog call trap ( Physalaemus cuvieri ) 2ª5; CE-MHS .

Description

Female adult (n = 5)

HEAD. Sensilla ( Fig. 27A ): Ocular row with 2 thick offset setae at ventral part, 14–16 setae shortly extending posteriorly. Subocular row not well-defined; interocular space and vertex with multiple slender setae. Postgenal row with 13–16 slender setae ranging from posterior end of ocular row to ventromedially. With 2 thick ventromedial setae.

THORAX. Sensilla ( Fig. 27B ): Antepronotum with 2–4 intermediate lateral setae, row of 11–14 slender setae ranging from anterodorsal to posterolateral margin. Postpronotum with 1 thick dorsal seta and 2–3 intermediate posterior setae. Scutum, prescutal area with 5 thick setae arranged dorsoventrally on posterior portion and 13–16 slender intermediate setae more anteriorly, merging with anterior portion of dorsocentral row; about 20 scattered slender setae, more concentrated on dorsal portion. Antealar area with 4–6 thick/intermediate setae vertically aligned on anterior portion, 3 thick setae on medium portion, 3 thick setae vertically aligned on posterior portion; 12–19 slender setae spread on ventral portion, about 40 dorsally located. Supraalar area with 3 thick and 2 intermediate setae surrounded by about 23–36 slender setae. Dorsocentral row, posterior part with cluster of 7–8 thick and 3–5 slender setae; about 24–31 thick/intermediate and 70 slender filling row. Scutellum with 14–16 thick setae. Posterior anepisternum bare. Anepimeron with 29–36 slender setae.

WING. R 3 /R 1: 0.48 (0.46–0.50); R 2+3 /R 2: 0.66 (0.60–0.77).

LEGS. Empodium ( Fig. 27C ) of intermediate length, slender, with 5 branches. Ta1/Ta2: 2.76 (2.65–2.90); Ta3/Ta4: 1.21 (1.14–1.30).

Distribution and biology

The examined specimens were collected via Shannon, CDC and frog-call traps (playing the calls of Physalaemus cuvieri and Scinax perereca ). Sampled locations included coastal and mountainous areas of Atlantic forest in Santa Catarina State, near marshes and small streams, at altitudes ranging from 115 to 960 m a.s.l. The female from Santo Amaro da Imperatriz has previously been recorded by Ambrozio-Assis et al. (2018).

This species is otherwise known from the Atlantic forest of São Paulo State, at altitudes ranging from 85 to 603 m a.s.l. ( Borkent 2008).

Figures

Fig. 27. Corethrella pillosa 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.