Cernotina aruma, 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 : 30

Cernotina aruma sp. nov.

Figs. 13–16

Description. Male. Length of each forewing 2.7–3.0 mm. General color, in alcohol, pale brown; head and thorax with golden setae, antennae light yellow, legs pale brown with dark brown setae, wings light brown with dark setae. Male genitalia. Sternum IX short with deep U-shaped incision in anterior margin ( Fig. 15 ). Tergum X membranous, divided mesally into 2 broad lobes covered by long setae ( Figs. 13, 14 ). Preanal appendages with dorsolateral lobes short, broad basally, subtriangular laterally, bearing very long setae ( Figs. 13, 14 ); and with ventromesal lobes simple, short and rod-like, each bearing stout apical spine surrounded by short, dark setae ( Figs. 13, 14 ). Inferior appendages elongate, apically darkened; each with basodorsal lobe fingershaped, strongly sclerotized, with apex curved inward, and bearing three short spine-like setae on internal surface ( Figs. 13, 15 ). Phallus tubular, short, with dorsoapical area depressed; internally, with 2 dark spines posteriorly, and phallicata sclerite formed by set of 3 pieces anteriorly ( Fig. 16 ).

Remarks. This species is not clearly related to any other species described in the genus. Cernotina aruma sp. nov. has a ventromesal lobe of each preanal appendage similar to that of C. compressa and C. odonta sp. nov., in that it is simple, bearing a stout apical spine. However, C. pesae can be easily distinguished by the presence of a dorsolateral lobe on each preanal appendage; and by the inferior appendages, each with its basodorsal lobe finger-shaped, apically curved inward, and bearing three spine-like setae on the internal surface.

Holotype male: BRAZIL: Amazonas: Manaus, Igarapé Arumã , tributary to Rio Cuieiras, 02°30'55.2"S 60°15'44.4"W, 23.viii.2004, J.L.Nessimian & L.Fidelis, light trap ( INPA)

Paratypes: Same data as holotype, 1 male ( INPA); Manaus, tributary to Rio Cuieiras, 02°32'10.0"S 60°19'01.9"W, 23.viii.2004, J.L.Nessimian & L.Fidelis, light trap, 1 male ( INPA); tributary to Rio Cuieiras, 02°04'13.9"S 60°23'01.4"W, 19.viii.2004, J.L.Nessimian & L.Fidelis, light trap, 1 male ( INPA); tributary to Rio Branquinho, 02°31'24.6"S 60°20'05.3"W, 25.viii.2004, J.L.Nessimian & L.Fidelis, light trap, 1 male ( INPA); tributary to Rio Branquinho, 02°29'35.1"S 60°20'03.1"W, 26.viii.2004, J.L.Nessimian & L.Fidelis, light trap, 23 males (11 males, INPA; 12 males, DZRJ).

Etymology. The species name refers to the stream where the holotype was collected.

Figures

FIGURES 13 – 16. Cernotina aruma sp. nov. (13) male genitalia, left lateral; (14) tergum X, and preanal appendages, dorsal; (15) sternum IX, and inferior appendages, ventral. (16) phallus, left lateral. Scale = 0.1 mm.