Tinodes samkuca, Johanson, Kjell Arne & Oláh, János, 2008

Johanson, Kjell Arne & Oláh, János, 2008, Description of seven new Tinodes species from Asia (Trichoptera: Psychomyiidae), Zootaxa 1854, pp. 1-15 : 3-5

Tinodes samkuca , new species

Fig. 4–6

This species is distinguished by the posteriorly 3-branched gonocoxite; a very long tergite IX that in dorsal view ends into a narrow, posterad oriented parallel-sided projection; and, in lateral view, a distally narrowing and sigmoid paraproctal process bearing 5 pairs strong megasetae.

Male genitalia ( Fig. 4–6 ). In lateral view, sternite IX with 2 anterad oriented, pointed processes ventrally and mid-height; posteroventrally produced into rounded lobes; apex of anterad oriented processes at midheight with weak suture curving ventrad to midlength of ventral face of sternite IX ( Fig. 4, 6 ). Tergum IX originating from small knob situated immediately above mid-height; anteriorly forming straight, wide stalk in lateral and dorsal views ( Fig. 4, 5 ); distal part broadening dorsally ( Fig. 4 ) before producing posterad and curving ventrad. In dorsal view, anterior stalks slightly widening posteriorly; posterior part very broad basally before strongly narrowing before mid-length; apex produced into narrow, posterad oriented parallel-sided projection ( Fig. 5 ). Superior appendages originating from bases of tergite IX; slightly sigmoid; setae restricted to distal half; slightly exceeding apex of tergite IX ( Fig. 4 ). Inferior appendages slightly longer than superior appendages ( Fig. 4 ); inferior appendage basal plate apodeme broad, club-shaped in lateral view ( Fig. 4 ); very slender, needle-shaped in dorsal and ventral views ( Fig. 5, 6 ); posterior parts broadly claw-shaped in lateral view; apices slightly pointing ventrad; with 2 small, laterad oriented megasetae on lateral surfaces; in ventral view apices very slender, oriented mediad before curving posterad, visible medially of harpagones ( Fig. 6 ). Paraproctal process originating from dorsal apex of sternite IX; sigmoid in lateral view ( Fig. 4 ); dorsobasal margin straight, produced posterad ( Fig. 4 ), pyriform in dorsal view ( Fig. 5 ); basal part oriented ventrad before slightly looping dorsad; with 3 pairs megasetae in row along ventral margin, followed by small megasetae in ventral group; divided into 2 tuboid branches ( Fig. 5 ) with 2 pairs long, apical megasetae ( Fig. 4, 5 ). Gonocoxites with basal half fused ventrally ( Fig. 6 ); coxopodites divided apically into large dorsal and short ventral branches; harpagones situated between coxopodite branches ( Fig. 4, 6 ); dorsal branches without setae; ventral branches with single apical, mediad oriented seta. Harpagones nearly as long as dorsal branch of coxopodites, covered by strong setae ( Fig. 4, 6 ).

Holotype male: MALAYSIA: Perak, Halong str., ix–x.1993, light [G. S. Robinson] (OPC, in alcohol). Etymology. samkuca , from “samkuc”, meaning shrunk in Vietnamese, referring to the small size of this species.

Figures

FIGURES 4 – 6. Tinodes samkuca, new species, holotype. 4 — genitalia, lateral; 5 — genitalia, dorsal; 6 — genitalia, ventral. Scale bar = 0.1 mm refers to Fig. 4 – 6.