Cernotina flexuosa, Santos, Allan Paulo Moreira & Nessimian, Jorge Luiz, 2008

Santos, Allan Paulo Moreira & Nessimian, Jorge Luiz, 2008, Five new species of Cernotina Ross (Trichoptera: Polycentropodidae) from Central Amazonia, Brazil, Zootaxa 1899, pp. 25-33 : 31-33

Cernotina flexuosa sp. nov.

Figs. 17–20

Description. Male. Length of each forewing 2.6–2.9 mm. General color, in alcohol, pale brown; head and thorax with golden setae, antennae light yellow, legs pale brown with dark brown setae, wings pale brown with brown setae. Male genitalia. Sternum IX short, with deep incision U-shaped in anterior margin ( Fig. 19 ). Tergum X membranous, divided mesally in 2 lobes covered by long setae ( Figs. 17, 18 ). Preanal appendages with dorsolateral lobes short, broad and oblong, with long setae ( Figs. 17, 18 ); and with ventromesal lobes simple, bent, and apices narrowed, gradually darkened, and curved laterad ( Figs. 17, 18 ). Inferior appendages elongate, apically dark, each with internal apical face straight; its basodorsal lobe reaching apex of main body of appendage, strongly sclerotized, depressed, bearing four spine-like setae on internal surface, apically truncate with short apicomesal projection ( Figs. 17, 19 ). Phallus tubular, short, with apicodorsal area depressed; internally with 2 long dark spines posteriorly, and phallicata sclerite with ventral semicircular piece and pair of oval plates dorsally ( Fig. 20 ).

Remarks. This new species is very similar to Cernotina filiformis Flint, 1971 , particularly in the shapes of the ventromesal lobes of the preanal appendages and tergum X. Cernotina flexuosa sp. nov. can be distinguished from C. filiformis by the free, strongly sclerotized, and apically truncate basodorsal lobe of each inferior appendage; and by the phallus bearing 2 long straight spines.

Holotype male: BRAZIL: Amazonas: Rio Preto da Eva municipality, tributary to Rio Preto da Eva, 02°41'28.7"S 59°42'01.3"W, 24.iv.2004, J.L.Nessimian, light trap ( INPA).

Paratypes: same data as holotype, 1 male ( INPA); Rio Preto da Eva municipality, tributary to Rio Preto da Eva, 02°41'24.3"S 59°42'01.8"W, 24.iv.2004, J.L.Nessimian, light trap, 1 male ( DZRJ); tributary to Rio Preto da Eva, 02°38'14.6"S 59°44'09.9"W, 23.iv.2004, J.L.Nessimian, light trap, 1 male ( DZRJ). Etymology. From Latin flexuosa (“winding” or “bent”) in allusion to the shape of the ventromesal lobes of the preanal appendages.

Figures

FIGURES 17 – 20. Cernotina flexuosa sp. nov. (17) male genitalia, left lateral; (18) tergum X, and preanal appendages, dorsal; (19) sternum IX, and inferior appendages, ventral. (20) phallus, left lateral. Scale = 0.1 mm.