Goera tenuis Ulmer 1927

Nozaki, Takao & Tanida, Kazumi, 2006, The genus Goera Stephens (Trichoptera: Goeridae) in Japan, Zootaxa 1339, pp. 1-29 : 17-19

Goera tenuis Ulmer 1927

Fig. 10

Goera tenuis Ulmer 1927 , 181, male.

Adult. Body, wings, antennae yellowish brown. Head trapezoidal; ocelli absent; anterior setal warts round, contact with each other; posterior setal warts large and round. Antennae 6–8 mm long; basal segment ca. 1 mm long with long setae. In male maxillary palpi, distal segment finger-like, membranous and elastic, bearing long setae; second segment small, membranous. Male abdominal sternite VI with 5–9 mm long spines, number and shape variable but usually central one longest. Female abdominal sternite VI bearing minute spines. Fore wing 5.5–7.0 mm long in male, 7.0–7.5 mm long in female.

Male genitalia. Segment IX oblique in lateral aspect; sternite IX slightly produced posteriorly, triangular in ventral aspect. Dorsal process of tergum X club-like in dorsal aspect, thickened at apex in lateral aspect. Paired ventrolateral processes asymmetrical; left one very slender, slightly shorter than right one, apical half unpigmented; right one relatively broad, curved ventrad at apex. Preanal appendage slender, slightly longer than dorsal process of tergum X. Basal segment of inferior appendage rectangular in lateral aspect. Distal segment of inferior appendage with 2 processes equal in length; apices of both rounded in lateral aspect; mesal one strongly screlotized. Phallus simple, narrow at apical 1/ 3 in dorsal aspect. In holotype male, mesal process of distal segment of inferior appendage is slightly narrower than in specimens collected from Yaeyama Islands.

Female genitalia. Tergum X finger-like in lateral aspect, parallel sided apically in dorsal aspect. Supragenital plate long. In lateral aspect, posterior margin of lamella rounded dorsally, square ventrally. In ventral aspect, gonopod plate round, apicomesal process triangular with acute apex. Spermathecal plate approximately 3/4 length as gonopod plate with rounded palte anteriorly.

Larva. Unknown.

Specimens examined. TAIWAN: Holotype, male, Suisharyo, x.1911, H. Sauter (DEI). Ishigaki-jima: 3 males, Takeda, Ishigaki-shi, 12.x.1999, K. Konishi (BJA); 1 male, Nagura-gawa, Takeda, Ishigaki-shi, 19.x.1999, K. Konishi (TN); 1 male, Mt. Banna-dake, 4–7.iv.2001, T. Ueda (MA); 4 males, Omoto-dake, 18–19.iii.2002, I. Oshima, K. Sugishima and T. Yoshida (TN); 1 female, Yarabe-dake, 14.v.1999, Nakatani (BJA); Iriomote-jima: 1 male, 4 females, Urauchi-gawa, Taketomi-cho, larvae collected on 29.xi.1996, emerged on 6–19.iii.1997, by M. Aoyagi (1 male, 2 females: MA; 2 females: TN); 1 male, Nishifunatsuki-gawa, Taketomi-cho, 23.iii.1999, T. Ito and A. Ohkawa (TN); 4 males, ibid., 12.v.1999, K. Tojo (TN).

Distribution. Japan (Ishigaki-jima, Iriomote-jima), Taiwan.

Japanese name. Taiwan-ningyo-tobikera.

Remarks. We examined the holotype male deposited in DEI. Right ventrolateral process has spreading apex in dorsal aspect as described by Ulmer (1927, fig. 25), but we think it is a malformed ( Fig. 10 e). Other characteristics of the holotype mostly agree with those of male specimens examined in this study. This species is recorded from Japan for the first time.

Figures

FIGURES 10 – 11. 10, Goera tenuis. Male sternite VI: a, ventral view. Male genitalia: b, lateral view; c, dorsal view; d, ventral view; e, apex of right ventrolateral process of the holotype, dorsal view; f, phallus, dorsal view. Female genitalia: g, lateral view; h, ventral view; i, dorsal view. 11, Goera tungusensis. Male sternite VI: a, ventral view. Male genitalia: b, lateral view; c, dorsal view; d, ventral view; e, phallus, dorsal view. Female genitalia: f, lateral view; g, ventral view; h, dorsal view.