Nebria (Falcinebria) pisciformis, 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) pisciformis sp. nov. Figs 12 , 29 Japanese name: Hakusan-hime-marukubi-gomimushi

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

Notes.

This species is known only from the type locality, Ôshirakawa-dani, which is situated on the eastern foot of Mount Hakusan. It is distinguished from N. niohozana , which is known from high altitude areas of Mount Hakusan, by a smaller body size, and from N. furcata sp. nov. by a lower PPW/EL and the shape of the dorsoapical lobe.

Description.

Body length: ♂, 9.51-9.54 mm (n = 2). PPW/EL: ♂, 0.309-0.320 (n = 2). Ventral surface of aedeagal apex not concave. Dorsobasal lobe present. Dorsomedian lobe absent. Dorsoapical lobe with the basal part protruding anterodorsally; the protrusion as long as and 1.5 times as wide as right laterobasal lobe; the apical portion directed ventrally, less than twice the width of subapical constriction; the apical margin simple, not furcate. Right laterobasal lobe small, with the width from the ventral view narrower than the width of the gonopore protrusion from the lateral view. Left laterobasal lobe small, with the width from the ventral view narrower than the width of the gonopore protrusion from the lateral view. Right lateroapical lobe small, strongly bent at the middle in an anterior direction. Left lateroapical lobe with the posterior part moderate in size and weakly bent at the middle in an anterolateral direction; the anterior part weakly swollen. Ventrobasal surface almost flat, without swelling.

Type materials.

Holotype: ♂ (NARO), Ôshirakawa-dani, 800-1250 m, Shirakawa-mura, Gifu Prefecture, Japan, 19.vi.1972, K. Tanaka & H. Ohira leg.; 1♂, same data as the holotype.

Etymology.

The specific name derives from a combination of the Latin words piscis (fish) and - formis (-shaped) and refers to the dorsal view of the dorsoapical lobe.

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 27 - 30. Right lateral (a), ventral (b), left lateral (c), and anterior (d) views of the endophallus and dorsal (e), posterodorsal (f), and left dorsolateral (g) views of the dorsoapical lobe of Nebria spp. 27 N. furcata sp. nov., holotype male 28 N. furcata sp. nov., paratype males from Amo Pass-Shoyashiki 29 N. pisciformis sp. nov., holotype male 30 N. kuragadakensis sp. nov., holotype male. db, dorsobasal lobe; other abbreviations are given in Figures 17 - 21. In N. furcata (27, 28), a 1 - 4 denotes apices of the dorsoapical lobe, and 28 d ' is presented to show individual variation in the focal endophallus structures.