Ochrotrichia caatinga, De Souza, Wagner Rafael M., Santos, Allan Paulo Moreira & Takiya, Daniela M., 2014

De Souza, Wagner Rafael M., Santos, Allan Paulo Moreira & Takiya, Daniela M., 2014, First records of Ochrotrichia Mosely, 1934 (Trichoptera: Hydroptilidae) in Northeastern Brazil: Five new species and two new geographical records, Zootaxa 3852 (2), pp. 273-282 : 274

Ochrotrichia caatinga sp. nov.

Figs. 1A–D

Description. Holotype. Adult male. Structure typical for Ochrotrichia spp. ( Flint 1972), except body length 2.0 mm (from tip of head to ends of folded wings). Length of each forewing 1.8 mm. General color brown with thorax lighter (in alcohol). Tibial spur formula: 1-3-4. Metascutellum subpentagonal. Abdomen without visible modifications.

Male genitalia. Sternum IX quadrangular ( Fig. 1A ), covered with long setae; tergum IX with anterior margin rounded on each side and posterior margin emarginated ( Fig. 1B ). Inferior appendages long, subrectangular with dorsal margin slightly emarginate and apex round in lateral view ( Fig. 1C ), with long setae over all surface and peg-like setae on internal surface ( Fig. 1B ). Tergum X divided longitudinally into two sclerotized processes ( Fig. 1B ), left process broader, basal portion slightly sclerotized, with apex curved and acute; right process more slender, slightly curved, and with acute apex ( Fig. 1B ). Phallus tubular, elongate, and slender; basal portion broader; ejaculatory duct protruding apically; with lateral process curved and overlying ejaculatory duct; apex, in dorsal view, with small spines ( Fig. 1D ).

Female and larva stages unknown.

Remarks. Based on the elongate inferior appendages and tergum X, in dorsal view, divided into two conspicuous processes, this new species is placed in the O. aldama group. Based on the shape of the tergum X, this new species is most similar to O. insularis Mosely, 1934 . However, O. caatinga sp. nov. can be distinguished from O. insularis by the shape of the inferior appendages, subrectangular and rounded apically in lateral view; by the absence of a hook-like process on tergum X; and by the phallus having small spines on the apical area and a curved lateral process. Variation of the body length 2.0 mm– 2.2 mm (n = 10).

Etymology. The name of this species refers to the Brazilian biome Caatinga , where the specimens were collected.

Holotype. 1 male, BRAZIL: Ceará: Ubajara, Parque Nacional de Ubajara, Rio Cafundó, acima da cachoeira, 3°50'13''S, 40°54'19''W, 874 m, 17–18.ii.2013, F. Limeira-de-Oliveira, J.A. Rafael, and D.M. Takiya cols., Malaise trap ( CZMA).

Paratypes. BRAZIL: Ceará: Ubajara, Parque Nacional de Ubajara, Trilha Araticum, Rio das Minas, 3°50'03''S, 40°54'18''W, 524 m, 17–18.ii.2013, F. Limeira-de-Oliveira, J.A. Rafael, and D.M. Takiya cols., Malaise trap, 1 male ( INPA). Ubajara, Parque Nacional de Ubajara, Trilha Samambaia, Rio Gameleira, 3°50'25''S, 40°54'19''W, 874 m, 20–24.iv.2012, D.M. Takiya and A.P.M. Santos cols., Malaise trap, 13 males ( DZRJ). Same data as holotype except 24.iv.2012, D.M. Takiya col., 1 male ( DZRJ). Ubajara, Parque Nacional de Ubajara, 3°50'31.7''S, 40°53'55''W, 13–17.xi.2012, F. Limeira-de-Oliveira col., Malaise trap, 3 males ( CZMA).

Figures

FIGURES 1 A – D. Ochrotrichia caatinga sp. nov. Male genitalia: A, ventral; B, dorsal; C, left lateral; D, phallus, dorsal. Scale: 0.1 mm.