Goera dilatata Nozaki and Tanida

Nozaki, Takao & Tanida, Kazumi, 2006, The genus Goera Stephens (Trichoptera: Goeridae) in Japan, Zootaxa 1339, pp. 1-29 : 26-27

Goera dilatata Nozaki and Tanida sp. nov.

Fig. 15

Diagnosis. This species is closely related to G. s p i c a t a, but can be easily distinguished from the latter by broadened, paired ventrolateral processes of tergum X in male, and shorter spermathecal plate in female.

Adult. General morphology and coloration are very similar to those of G. s p i c a t a, and distinguished only by genitalic characters. Forewing 5.5– 7 mm long in both sexes.

Male genitalia. Segment IX similar to that of G. s p i c a t a but dorsal part shorter and anterior margin gently concaved in lateral aspect. Dorsal process of tergum X slender club-like. Paired ventrolateral processes strongly screlotized, about 1.3 times as long as dorsal process, middle to apical 1/4 part broadened, with acute apices directed ventromesally, usually with 2 setae near apices laterally. Preanal appendages club-like. Inferior appendages similar to those of G. s p i c a t a, but mesal process of distal segment more slender and twisted. Phallus similar to that of G. s p i c a t a.

Female genitalia. Terga IX and X similar to those of G. s p i c a t a. Lamellae large, triangular in lateral aspect, with angular ventroposterior corner in lateral and ventral aspects. Spermathecal plate similar to that of G. s p i c a t a, but about 2/3 length of gonopod plate and without lobes anteriorly.

Larva. Unknown.

Holotype male: JAPAN: Akita: Umaarai-shimizu, Yashikida, Yarida, Misato-cho, 39º25’59’’N, 140º32’34”E, 9.vi.1998, H. Nishimoto (in alcohol, CBM-ZI 130499).

Paratypes. 5 males, 2 females, same data as the holotype (1 male, 1 female: CBM-ZI 130500; 2 males, 1 female: USNM; 2 males: TN).

Other specimens examined. Hokkaido: 2 males, 10 females, Oshironai-gawa, Shirakawa, Mori-machi, 8.vi–25.vii.1994, M. Nakajima (TN); 1 male, 9 females, ibid., 13.vi.–3.viii.1995, M. Nakajima (TN); Iwate: 1 male, Okawa, Komagasawa, Iwaizumicho, 12.vii.1997, N. Kuhara (NK); 1 male, Kanazawa-shimizu, Matsuo, Hachimantai-shi, 10.vi.1998, H. Nishimoto (TN); Miyagi: 4 males, 3 females, Yokokawa, 500 m a. s. l., Shichigashuku-machi, 5.vii.1998, T. Hattori (2 males, 2 females: BJA; 2 males, 1 female: TN); Akita: 2males, Kaminoguchi, Shimizu, Daisen-shi, 30.vi.1993, K. Aoya (NK); Niigata: 4 females, Kaminoguchi, Arakawa-machi, 3.vi.1984, S. Togashi (TN); 1 male, 1female, ibid., 5.vi.1984, S. Togashi (TN).

Etymology. The specific name refers to broadened, ventrolateral processes of tergum X in male genitalia.

Distribution. Japan (southern Hokkaido, central to northeastern Honshu)

Japanese name. Futoo-hime-ningyo-tobikera.

Figures

FIGURES 14 – 15. 14, Goera spicata. Male sternite VI: a, ventral view. Male genitalia: b, lateral view; c, dorsal view; d, ventral view; e, phallus, lateral view; f, phallus, dorsal view. Female genitalia: g, lateral view; h, dorsal view; i, ventral view. 15, Goera dilatata. Male genitalia: a, lateral view; b, dorsal view; c, ventral view; d, phallus, lateral view; e, phallus, dorsal view. Female genitalia: f, lateral view; g, dorsal view; h, ventral view.