Pahamunaya spinifera, 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 : 2-4

Pahamunaya spinifera sp. n.

( Figure 2 )

Diagnosis. Pahamunaya spinifera is similar to P. jihmita Schmid and Denning , P. directoris Malicky ,

and P. khoii Oláh and Johanson , in the shape of segment X; in the long, heavily sclerotized intermediate appendages; and in complex inferior appendages, bearing two pairs of crossed filamentous processes. It can be easily distinguished from these species by sternite IX bearing an elongate, acuminate projection posterolaterally; and by the intermediate appendages bearing spines along their ventral margins.

Description. Length of forewing 3.2-3.9 mm. General color of adult male in alcohol pale yellowish,

thorax and dorsal part of abdomen slightly brownish. Wing venation similar to Pahamunaya talon ,

described above.

Male genitalia. Shape of sternite IX irregular in lateral view, each side with nearly triangular projection posterodorsally and elongate, acuminate projection posterolaterally. Segment X slightly sclerotized, elongate,

straight in lateral view, notched apically in dorsal view, with pair of papilla ventromesally, each with a single seta. Preanal appendage absent or completely fused with intermediate appendage. Intermediate appendage long, slender, extending posteriorly beyond segment X; in lateral view, basal third straight,

subvertical, then slightly twisted and bent at 120 degree angle posteriorly, gradually tapering to acute apex; ventrally bearing spines, which shorten distally; in dorsal view, sinusoid, bent posteromesad, place of twist, or “elbow” smooth in holotype, but has angulated apex in some paratypes (as illustrated in Fig.

2B with dashed lines); lower inner angles form complete bridge under phallic apparatus. Inferior appendage complex, bearing dorsal digitate process, bent posterad in lateral view; apex in lateral view divided posteriorly into two, widely separated triangular lobes, with paired filamentous processes medially.

Phallic apparatus large, arched, with digitate ventromesal projection directed posterad, apical portion nearly tubular.

Distribution. Known from Quang Nam and Thua Thien-Hue Provinces in Vietnam.

Material examined. Holotype male. Vietnam: Thua Thien-Hue Province, Nam Dong District, Huong

Loc Commune, ca. 9 km SE Khe Tre, riparian vegetation, Malaise trap, 26 May-1 June 2002, C. Darling,

ROM 2002508 . Paratypes: 2 males, same data as holotype ; 1 male, Quang Nam Province, Ngoc Linh , 830 m, 15 o 10’N, 108 o 05’E, Malaise trap, 11-18 March 1999, K. Long, C. Johnson, AMNH ; 7 males, ibid., 950 m, 15 o 11.2’N, 108 o 2.3’E, Malaise trap, 16 April 1999, D. Grimaldi, L. Herman, C. Johnson, K. Long ,

E. Sterling, AMNH.

Etymology. This species is named for the spine-bearing intermediate appendage of the male genitalia

(spina is Latin for “spine” and fero is Greek for “to carry or bear”).

Figures

Figure 2. Pahamunaya spinifera sp. n., male genitalia. A) Lateral; B) Dorsal; C) Ventral; D) Phallic apparatus, lateral.