Goera neboissi Armitage & Arefina-Armitage 2011, sp. n.

Goera neboissi sp. n.

Fig. 1, 4-12

Diagnosis. This new species is similar to Goera skiasma, G. jolanda sp. n., and G. higleri sp. n., which together form a species group. The male genitalia of G. neboissi differs by the shape of the ventrolateral processes of tergum X; by the unique, trilobed shape of the distal segment of the inferior appendage; by the short subbasal projection of the mesal process of the inferior appendage; and, by the tubular phallus in dorsal view. The female genitalia of G. neboissi share some similarities with those of G. skiasma and G. higleri but are distinct in the shape of sternite IX in both, lateral and ventral, views, as well as in the shape of supragenital plate, vulvar scale and vaginal apparatus having a short vaginal vestibule.

Adult. Length of forewing: male – 4.7-6.2 mm; female – 5.9-7.0 mm. Body and wings (in alcohol) light yellowish brown in both sexes. Sternite VI in males usually with three spines (central longer than lateral), however holotype male with four spines unequal in number and length on each side; in females with two spines of smaller size on each side of central spine with bifid apex. Sternite V lacks spines. Erectile lobe of male maxillary palp yellowish, nearly cylindrical with short, tapered projection at base, about onefifth length of lobe in unexpanded condition (Fig. 1).

Male genitalia (Fig. 4-9). Segment IX nearly vertical; in lateral view, anterior margin widely rounded and medially produced anteriorly. Preanal appendages elongate, 2.5 times shorter than ventrolateral process of tergum X. Median dorsal process of tergum X absent. Ventrolateral process of tergum X flat, semi-oblanceolate in dorsal view, extended posteriorly as far as inferior appendage in lateral view; with mesal margin slightly concave, and having small surface creases. Basal segment of inferior appendage about twice as high as wide in lateral view. Distal segment of inferior appendage forms three lobes: long, claw-like apicodorsal lobe; short, triangular subapical lobe; and short, rounded basal lobe. Mesal process of inferior appendage long, in lateral view bent ventrocaudad, tapering to acute apex, and having short subbasal projection; in ventral view mesal process tapering, with claw-like apex directed posterolaterad and subbasal projection knob-like. Phallus long, constricted mesally and gently bent posteroventrad in lateral view; tubular with expanded membranous apical portion in dorsal view; parameres absent.

Female genitalia (Fig. 10-12). Sternite IX with sinusoidal distal margin in ventral view. Segment X without deep apicomesal incision, typical of most Goera species, but with shallow depression in ventral view. Supragenital plate rather short, widely truncated distally in ventral view. Vulvar scale short, divided by shallow mesal depression in ventral view; lobes rounded. Vaginal apparatus elongate with short vaginal vestibule.

Immature stages. Unknown.

Holotype male: INDONESIA, Sulawesi, Tenggara, Peg. Boroboro, 30 km SW Kendari, 200 m, 26 October 1989, MV light, J. Huisman, RMNH JS 8926. Paratypes: 5 males, 4 females, same data as holotype.

Etymology. This species is named after the late Dr. Arturs Neboiss of the Victoria Museum, Melbourne, Australia, in recognition of his lifetime passion for caddisflies.