Nebria (Falcinebria) iidesana, Sasakawa, 2020

Sasakawa, Koji, 2020, Taxonomic studies of the ground beetle subgenus Falcinebria Ledoux & Roux, 2005 (Coleoptera, Carabidae, Nebria) from Honshu, Japan, ZooKeys 902, pp. 37-60 : 37

Nebria (Falcinebria) iidesana sp. nov. Figs 7 , 20 , 21 Japanese name: Iide-hime-marukubi-gomimushi

Nebria reflexa : Uéno (1985): 56 (part); Nakane (1963b): 19 (part).

Nebria (Paranebria) reflexa niohozana : Habu and Baba (1972): 3 (part).

Notes.

This species is known from the Iide Mountains. Sympatry with N. niohozana is considered confirmed based on an observation from the NARO collection, where paper cards affixed to a paratype male of this species and male specimen of N. niohozana were held together with the same pin. In external and endophallus characters, N. sagittata sp. nov. is a similar species. Nebria iidesana is distinguished from N. niohozana by a smaller body size and larger PPW/EL, and from N. sagittata sp. nov. by a right lateroapical lobe that is not narrowed apically.

Description.

Body length: ♂, 9.16-9.87 mm (mean ± SD: 9.53 ± 0.29 mm, n = 5); ♀, 10.25-10.64 mm (mean ± SD: 10.39 ± 0.17 mm, n = 6). PPW/EL: ♂, 0.319-0.350 (mean ± SD: 0.334 ± 0.013, n = 5); ♀, 0.321-0.338 (mean ± SD: 0.330 ± 0.006, n = 6). Ventral surface of aedeagal apex not concave. Dorsobasal lobe absent. Dorsomedian lobe absent. Dorsoapical lobe with the basal part protruding anterodorsally; the protrusion slightly smaller than the right laterobasal lobe; the apical portion directed dorsally, bifurcated at the apex; the right and left apices almost similar in size. Right laterobasal lobe small, with the width from a ventral view narrower than the width of the gonopore protrusion from a lateral view. Left laterobasal lobe small, with the width from a ventral view narrower than the width of the gonopore protrusion from a lateral view. Right lateroapical lobe large, almost semispherical, slightly concave at the top. Left lateroapical lobe large, narrowed apically. Ventrobasal surface almost flat, without swelling.

Type materials.

Holotype: ♂ (NARO), Mount Takizawamine, alt. 1300 m, Kurokawa, Niigata Prefecture, Japan, 27.vii.1957, K. Baba leg. Paratypes (NARO): 3♂6♀, Kurokawa, Niigata Prefecture, Japan, K. Baba leg. (1♂, Wataba, 25.vii.1957; 1♀, Wataba, 23.vii.1957; 1♀, Wataba, 24.vii.1957; 1♀, Wataba, 25.vii.1957; 1♀, Tamogi, alt. 600 m, 25.vii.1957; 1♂, 18.ix.1959; 1♂2♀, 23.vi.1964); 1♂, Mount Kitamata, the Iide Mountains, Niigata Prefecture, Japan, 15.viii.1964, K. Baba leg.

Etymology.

The specific name refers to the Iide Mountains, where the type materials were collected.

Figures

Figures 5 - 16. Habitus dorsal view of Nebria spp. 5 N. reflexa, a male from the type locality 6 N. sagittata sp. nov., holotype male 7 N. iidesana sp. nov., holotype male 8 - 10 N. niohozana males from Mount Chokai (8), Doai, a locality close to the type locality designated for the lectotype (9), and Mount Hakusan (10); 11 N. furcata sp. nov., holotype male 12 N. pisciformis sp. nov., holotype male 13 N. kuragadakensis sp. nov., holotype male 14 N. dichotoma sp. nov., holotype male 15 N. uenoi, a male from the type locality 16 N. chugokuensis sp. nov., holotype male.

Figures 17 - 21. Right lateral (a), ventral (b), dorsal (c), and posterodorsal (d) views of the endophallus and the left dorsolateral view of the dorsoapical lobe (e) of Nebria spp. 17 N. reflexa male from the type locality 18 N. sagittata sp. nov., holotype male 19 N. sagittata sp. nov., a paratype male from " Asahi-mura " 20 N. iidesana sp. nov., holotype male 21 N. iidesana sp. nov., paratype male from Mount Kitamata. Abbreviations: da, dorsoapical lobe; dm, dorsomedian lobe; go, gonopore; gp, gonopore protrusion; la, left lateroapical lobe; lb, left laterobasal lobe; ra, right lateroapical lobe; rb, right laterobasal lobe. Asterisk indicates that the gonopore protrusion or lobes are not fully everted.