Nebria ( Falcinebria ) dichotoma Sasakawa, 2020

Nebria ( Falcinebria) dichotoma Sasakawa, 2020 View in CoL

Figs 8 View Figures 6–9 , 9 View Figures 6–9

Nebria dichotoma View in CoL : Sasakawa (2020): 52 View Cited Treatment (original description; subgenus Falcinebria ; type locality: “ Mount Takanosu (= Mount Dando), alt. 1000 m, Shitara-machi, Aichi Prefecture, Japan ”).

Material examined.

1 ♂ 1 ♀ ( KS), Japan • Aichi Prefecture, Toyota-shi, Otagicho, Dando-dani Valley , 27-V-1989, Hiroshi & Masami Nishida leg. ; 2 ♂ ( KS), Japan • Nagano Prefecture, Hiraya-mura, near Hiraya-tôge Pass , 14-VI-2002, Hiroshi & Takeyuki Nishida leg.

Notes.

Dando-dani Valley is located on the southern slope of Mount Takanosu-yama and can be regarded as virtually identical to the type locality. The record from Hiraya-tôge Pass is the northernmost collection record for this species, the first record outside the type locality, and the first record from Nagano Prefecture. The endophallus of the Hiraya-tôge Pass specimen differed slightly from that of specimens from the type locality in the shape of the backward sub-lobe at the apical 2 / 5 of the dorsoapical lobe (slightly bifid in the Hiraya-tôge Pass specimen versus simply rounded in the specimens from the type locality) and in the sizes of sub-lobes of the dorsomedian lobe and the base of the dorsoapical lobe. In the original description of N. dichotoma , the morphology of the gonopore protrusion could not be examined because of insufficient inversion of this structure. Therefore, the present result provides the first description of the gonopore protrusion of this species. Its gonopore protrusion was simple cylindrical, relatively long, and strongly bent at the base toward the base of the endophallus.