Ishikawatrechus ishiharai Uéno, 1994

Sugaya, Kazuki & Yamasako, Junsuke, 2014, A new species of the genus Ishikawatrechus (Coleoptera, Trechinae) from Japan, Zootaxa 3768 (2), pp. 189-195 : 194-195

Ishikawatrechus ishiharai Uéno, 1994

( Figs 5–6, 9–10 , 16–19 )

Ishikawatrechus ishiharai Uéno, 1994: 339 ; 2008: 14

Specimens examined. 1♂, Iwaguro-yama, alt. ca. 1,550 m, Wakayama, Kumakogen-chô, Kamiukena-gun, Ehime Pref., 24. IX. 2011, K. Sugaya leg.; 1♀, same locality but 21. XI. 2011, H. Hara leg.; 2♂, 1♀, Odama-dani, alt. ca. 1,500 m, Nishinokawa-chô, Saijô-shi, Ehime Pref., 12. IX. 2012, K. Sugaya leg. (our own collections).

Additional description. Male genitalia (n = 3, Figs 5–6 , 16–19 ). Internal sac in fully inflated condition through eversion (n = 3, Figs 16–19 ) about twice as long as aedeagus, elongated pyriform, asymmetric, twisted leftwards behind middle; basal half swollen into elongated tube-shaped, without any projections and copulatory pieces, covered with spicules excepted for small crescent area on basal 1/3 of left lateral side; apical half well swollen into an elongated bulb, with spicules on the longitudinal area which is extending from basal half to periphery of gonopore through ventral side; gonopore (GP, Figs 16–17, 19 ) opening on ventral side. Spicules ( Figs 16–19 ) on basal half usually fine, scaly and weakly sclerotized, but those on the area obliquely and curvedly extending from dorsal left side to dorsum distinctly spinous and well sclerotized; those on apical half rudimentary sclerotized.

Female genitalia (n = 2, Figs 9–10 ). GC1 near quadrate, with 4 short setae on ventral side of apical margin and 2 short setae on dorsal side of inner margin near apex; GC2 slender, slightly curved outwardly, pointed at apex, well emarginated at middle of outer margin, with 2 ensiform setae on dorsal side near base and 2 nematiform setae on ventral side near apex.

Figures

FIGURES 3 – 10. Genital organs of Ishikawatrechus spp. 3 – 4, 7 – 8, I. bidilatatus sp. nov.; 5 – 6, 9 – 10, I. ishiharai. 3, 5, Aedeagus in left lateral view; 4, 6, Apex of aedeagus in dorsal view; 7, 9, Left stylus in ventral view; 8, 10, Ditto in dorsal view. Abbreviations; GC 1, basal gonocoxite 1; GC 2, apical gonocoxite 2.

FIGURES 11 – 19. Internal sac of Ishikawatrechus spp. 11 – 15, I. bidilatatus sp. nov.; 16 – 19, I. ishiharai. 11, 16, Right lateral view; 12, 17, Left lateral view; 13, 18, Dorsal view; 14, 19, Ventral view; 15, Copulatory piece of I. bidilatatus. Abbreviations; CP, copulatory piece; GP, gonopore.