Pahamunaya talon, Arefina-Armitage, Tatiana I. & Armitage, Brian J., 2012

Arefina-Armitage, Tatiana I. & Armitage, Brian J., 2012, Two new species of the genus Pahamunaya Schmid (Trichoptera: Polycentropodidae) from Vietnam Tatiana I. Arefina-Armitage and Brian J. Armitage, Insecta Mundi 2012 (225), pp. 1-6 : 1-2

Pahamunaya talon sp. n.

( Figure 1 )

Diagnosis. This species has an apparent similarity to Pahamunaya akontios Malicky and

Chantaramongkol, especially in the general shape of segment X and complex inferior appendages, as viewed laterally; and, in possessing long, heavily sclerotized intermediate appendages. Pahamunaya talon differs from this species in having intermediate appendages curved posteroventrad in the shape of a talon,

and a ventromesal, spatula-like process on sternite IX.

Description. Length of forewing 3.7-3.9 mm. General color of adult male in alcohol pale yellowish,

thorax and dorsal part of abdomen slightly brownish. Wing venation and forks ( Fig. 1A ) fit generic description and match Pahamunaya wings illustrated by various authors. Forewings long and narrow with forks II, IV and V; discoidal cell closed, as long as Rs; thyridial cell closed, nearly twice as long as discoidal cell; median cell open; main cross-veins present. Hind wings narrow with forks II and V; anterior edge with shallow, linear emargination for two-thirds of length from apex.

Male genitalia. Sternite IX taller than wide, bean-shaped in lateral view; each side with basolateral triangular projection directed posterad; mesoventrally with elongate, near-rectangular process, as viewed laterally, or spatula-like with truncate apex, in ventral view. Segment X in lateral view, gently arched,

slightly sclerotized posterolaterad; separated dorsomesally by membranous area in dorsal view. Preanal appendage fused with intermediate appendage and reduced to small, rounded lobe in lateral view.

Intermediate appendage talon-like in lateral view, bearing single spine dorsally and directed posterad;

lower inner angles form closed bridge under phallic apparatus. Inferior appendage trilobed: dorsal lobe elongate with truncate apex in lateral view and rounded apex in ventral view; mesal lobe claw-like,

curved posterodorsad in lateral view and mesad in ventral view; ventromesal lobe with acute apex pointed posteroventrad in lateral view and posteromesad in ventral view. Phallic apparatus massive, arched, with elongate, trigger-like ventromesal projection; apical portion enlarged with spiny sclerite visible inside of inverted endotheca.

Distribution. Known only from the type locality in Quang Nam Province ( Vietnam).

Material examined. Holotype male. Vietnam: Quang Nam Province, Ngoc Linh , 950 m, 15 o 11.2’N, 108 o 2.3’E, Malaise trap, 23 March 1999, D. Grimaldi, L. Herman, C. Johnson, K. Long, E. Sterling,

AMNH. Paratype: 1 male, same data as holotype.

Etymology. This species is named for the talon-like intermediate appendage of the male genitalia ( talon is Middle English for the hind claw of a bird of prey).

Figures

Figure 1. Pahamunaya talon sp. n., male. A) Fore- and hind wings. Genitalia: B) Lateral; C) Dorsal; D) Ventral; E) Phallic apparatus, lateral.