Goera akagiae Tanida and Nozaki

Nozaki, Takao & Tanida, Kazumi, 2006, The genus Goera Stephens (Trichoptera: Goeridae) in Japan, Zootaxa 1339, pp. 1-29 : 7-9

Goera akagiae Tanida and Nozaki sp. nov.

Fig. 3

Goera sp. GC: Akagi 1974, 18–19, larva, case, male genitalia; Tanida 1985, 197, larva.

Diagnosis. This species and G. uchina sp. nov. are very closely related to each other in having a forked ventromesal lobe of segment IX and a pair of notched ventrolateral processes of tergum X, but easily distinguishable from the latter by the following characters. In male genitalia, ventromesal lobe of segment IX broad U-shaped, but rather slender V-shaped in G. uchina ; and ventrolateral processes deeply notched in G. akagiae , but weakly in G. uchina . In female genitalia, G. akagiae has slender gonopod plate and spermathecal sclerite than those of G. uchina .

Adult. General morphology and coloration are very similar to those of G. japonica . Forewings 8.5–9.5 mm long in male, 9–10.5 mm long in female.

Male genitalia. Segment IX oblique in lateral aspect, posterior margin extended midway; ventromesal lobe present, bilobed posteriorly, broad U-shaped in ventral aspect. Dorsal process of tergum X absent. Paired ventrolateral processes of tergum X long, relatively broad in lateral aspect; apices branched, both acute, curved downward, inner one longer. Preanal appendages long, about 2/3 as long as ventrolateral processes. Inferior appendages large; basal segment oblique in lateral aspect; distal segment with long apicodorsal lobe, finger-like, mesal process curved laterad in ventral aspect. Phallus elongate, tubular, curved ventrad in lateral aspect, slightly swollen at apical third in lateral aspect; phallic apodema triangular in lateral aspect.

Female genitalia. Tergum X bilobed, each triangular in dorsal aspect, finger-like in lateral aspect. Supragenital plate long, apex rounded in ventral view. Lamellae slightly bilobed, rounded apically. Gonopod plate about as long as wide, apicomesal process trapezoid. Spermathecal sclerite about 2 times as long as wide with rounded lateral margin in ventral view.

Larva. Akagi (1974) described Goera sp. GC based on larvae collected from Amami Island. She also provided figures of male genitalia of this species, which agree well with those of G. akagiae described here.

Holotype male: JAPAN: Amami-Ohshima: Chuo-rindo, Uken-son, Kagoshima, 28°17’N, 129°21’E, 6.iv.1996, T. Nakatani and T. Ueda (in alcohol, OMNH TI 213).

Paratypes: Amami-Ohshima: 1 male, 9 females, same data as the holotype (1 male, 2 females: OMNH, 7 females: KT); 3 males, Hatsune, Sumiyo-cho, Amami-shi, Kagoshima, 28°13’N, 129°22’E, 2.iv.1996, T. Nakatani and T. Ueda (KT).

Other specimens examined. Kochi: 2 females, near Ashizuri-misaki, Tosashimizu-shi, 21.v.1999, A. Ohkawa and T. Ito (TN); 1 male, Tsuro, Tosashimizu-shi, 2.iv.2005, M. Takai (TN); Amami-Oshima: 3 males, 12 females, Naze-kominato, Amami-shi, 4.xii.1991, S. Mukaiyama (KT); 3 females, Yagachi-gawa, Sumiyo-cho, Amami-shi, 11.iii.1975, S. Hashimoto (KT); 1 female, Hatsune, Sumiyo-cho, Amami-shi, 4–5.iv.1996, T. Ueda (MA); 2 males, 10 females, Uken-son; 1 male, a fall of Kokachi-gawa, Uken-son, 19.iii.1999, T. Ito and A. Ohkawa (TN); 1 larva, a tributary of Kawauchi-gawa, Uken-son, 19.iii.1999, T. Ito and A. Ohkawa (TN); 1 male, Materia-no-taki, Yamato-son, 2.xii.1997, G. Ito ( BJA); 1 male, 3 females, Toguchi-gawa, Tatsugo-cho, 18.iii.1999, T. Ito and A. Ohkawa (1 female: BJA; 1male, 2 females: TN); Yaku-shima: 1 female, Onoaida, Yakucho, 17.iv.2003, A. Ishizuka (TN); 1 male, Biwatsubo-bashi, Kuni-gawa, Miyanoura, Kamiyaku-cho, 8.v.2006, T. Ito (TN); 1 male, a tributary of Miyanoura-gawa, Kamiyakucho, 10.v.2006, T. Ito (TN).

Etymology. This species is named in honor of late Ms. Ikue Akagi, who intensively studied the Japanese Trichoptera larvae in 1960’s and described the larva and male genitalia of this species for the first time.

Distribution. Japan (Shikoku, Amami-Oshima, Yaku-shima).

Japanese name. Amami-ningyo-tobikera

Figures

FIGURES 3 – 4. 3, Goera akagiae. 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. 4, Goera uchina. 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.