Flintiella pallida, De Souza, Wagner Rafael M., Santos, Allan Paulo Moreira & Takiya, Daniela Maeda, 2016

De Souza, Wagner Rafael M., Santos, Allan Paulo Moreira & Takiya, Daniela Maeda, 2016, Three new species of Stactobiinae (Trichoptera: Hydroptilidae) with the first record of Orinocotrichia Harris, Flint & Holzenthal from Brazil, Zootaxa 4078 (1), pp. 337-343 : 341

Flintiella pallida sp. nov.

( Figures 2A–E )

Material examined. Holotype male. BRAZIL: Maranhão: Carolina, Parque Nacional da Chapada das Mesas, Riacho Cancela, Malaise trap, 07°06’43.4”S 47°17’16.6”W, 186 m a.s.l., 18-21.IX.2014, W.R.M. Souza & T.T. Andrade leg. ( CZMA). Paratypes. Same data as holotype, 2 males ( CZMA), 2 males ( INPA), 2 males ( DZRJ); same data but Mirador, Parque Estadual do Mirador, Pennsylvania trap, 06°43’50.8”S 44°59’01.6”W, 264 m a.s.l., 22.IX.2014, W.R.M. Souza & T.T. Andrade leg., 2 males ( DZRJ).

Description. Holotype. Adult male. Length (from tip of head to the wing apex) 1.8 mm. General color pale yellow (in alcohol). Head without modification. Antennae simple; 18-articulated. Ocelli absent. Tibial spur formula 0-2-3. Fore- and hind wing venation reduced to basal veins. Mesoscutellum with transverse suture. Metascutellum rectangular, short, and wide. Abdomen without visible modifications. Segment VII without a mesoventral process. Male genitalia. Segment VIII annular, ventrally with posterior margin membranous. Segment IX reduced; elongate apodemes originating from the anterolateral margin of segment, extending into segment V ( Figs 2A, C ). Inferior appendages, in ventral view, elongate and curved laterad ( Fig. 2B ); in lateral view narrowing posteriorly with short setae ( Fig. 2C ). Subgenital plate conspicuous and elongate; in ventral view excised at apex and bearing 2 sclerites originating at midlength ( Fig. 2B ); in lateral view with apex digitiform ( Fig. 2C ). Tergum X elongate, with lateral margins rounded, truncate apically ( Fig. 2A ); in lateral view subrectangular, dorsal margin rounded ( Fig. 2C ). Phallus tubular, long, and slender, slightly broad basally narrowing at midlength ( Fig. 2D ); in lateral view with acute, darkened, and curved ventrally apex ( Fig. 2E ); ejaculatory duct protruding apically.

Etymology. The specific name is an allusion to the general color of Flintiella species.

Remarks. The new species shares some features with Flintiella pizotensis Harris, Flint & Holzenthal, 2002 , such as the inferior appendages narrowing posteriorly, subgenital plate with processes, and undivided phallus apex. However, F. pallida sp. nov. can be easily distinguished from F. pizotensis and other congeners by the digitiform processes of the subgenital plate, tergum X elongate with posterior margin truncate, and acute and ventrally-turned phallus apex.

Figures

FIGURES 2 A – E. Male genitalia of Flintiella pallida sp. nov.. A. dorsal; B. ventral; C. left lateral; D. phallus, dorsal; E. phallus, lateral. Scale bar = 0.1 mm.