Nebria (Falcinebria) kobushicola Sasakawa, 2023

Sasakawa, Koji, 2023, Taxonomic study of the alpine carabid beetle Nebria (Falcinebria) taketoi Habu, 1962 (Coleoptera, Carabidae), Alpine Entomology 7, pp. 185-194 : 185

Nebria (Falcinebria) kobushicola Sasakawa sp. nov.

Figs 3C, D, G, H, K , 5

Nebria taketoi Habu: Nakane (1974): 15 (part, subgenus not specified); Yoshitake et al. (2011): 34 (part, subgenus Nebria Falcinebria ).

Types.

Holotype: ♂ (NARO), Mount Kobushigatake, Chichibu-shi Saitama Prefecture, 3.viii.1963, S.-I. Uéno leg. Paratypes: 1♂2♀ (NARO), same data as the holotype; 1♂ (HUM), Akadakekousen, alt. ca. 2240 m, the Yatsugatake Mountains, Chino-shi, Nagano Prefecture, 25.vii.1956, F. Motoyoshi leg.

Diagnosis.

This new species is distinguished from N. taketoi by more protruded anterior angles of the pronotum, less punctated pronotal margin and ventral sides of some notal and abdominal segments, and bifurcated apices of lateroapical and dorsoapical lobes of the endophallus.

Description.

Body length: ♂, 10.78-11.08 mm (mean ± SD: 10.88 ± 0.17 mm, n = 3); ♀, 11.11-11.82 mm (mean ± SD: 11.47 ± 0.51 mm, n = 2).

Head: Dorsal surface smooth; antennomere 1 with one seta.

Pronotum: Surfaces of anterior transverse impression, lateral margins, laterobasal impressions, and area between the transverse groove and posterior margin only sparsely punctate.

Elytra: Anteroposterior length between the level of the basal transverse line and that of the posterior end of the scutellar stria> 4 times longer than the anteroposterior length between the level of the basal transverse line and that of the posterior end of the scutellum. One setigerous puncture on stria 1.

Ventral side: Submentum with 16-20 setae. Punctations of prosternum surfaces near anterior margin and anterolateral corners and pleuron denser than or as dense as those at the pronotal laterobasal impressions. Mesosternal, metasternal and adominal surface almost smooth except for mesepisternum, mesepimeron, and metepisternum for all specimens examined, and metasternum and sternite II for some specimens. All surfaces of mesepisternum, mesepimeron, and metepisternum punctate to the same degree as or more densely than the pronotal laterobasal impressions. Punctures of metasternum (lateral sides) and sternite II (anterolateral sides) varying among individuals, ranging from absent to the same as on other notal parts. Sternites IV-VI with two to three setae on each lateral side. Male sternite VII with two to three setae on each lateral side.

Male genitalia: Laterobasal lobes semi-spherical; inflated lobes directed ventrally, not covering the aedeagal apex on lateral views. Lateroapical lobe markedly wide on dorsal view, with the base as wide as or slightly wider than the width of the base of the dorsoapical lobe; anterior and posterior corners protruding in apical and basal directions, respectively, resulting in T-shaped dorsoapical lobes on dorsal view. Dorsoapical lobe with a protrusion on the dorsobasal part; the protrusion directed dorsobasally, not bent; apex of the dorsoapical lobe in a Y-shaped bifurcation on dorsal view; each of the bifurcated apices larger than the protrusion on the dorsobasal part. Dorsobasal surface near the ostium only slightly or not at all swollen. Gonopore protrusion directed ventrally.

Figures

Figure 3. External structures of Nebria taketoi and N. kobushicola sp. nov. A, E. N. taketoi holotype male from Mikurigaike; B, F, J. N. taketoi male from Murododaira; I. N. taketoi female from Murododaira; C, G, K. N. kobushicola holotype male from Mount Kobushigatake; D, H. N. kobushicola paratype male from Mount Aka; A-D. Habitus, in dorsal view; E-H. Pronotum, in dorsal view; I-K. Elytral base around the median line in dorsal (I, K) and left dorsolateral (J) views, showing the variation [present (yellow arrows) or absent (no arrow)] in setigerous puncture on stria 1.

Figure 5. Endophallus of Nebria kobushicola sp. nov. A-D. Holotype male from Mount Kobushigatake; E-H. Paratype male from Mount Kobushigatake; I-L. Paratype male from Akadakekousen. Right lateral view (A, E, I), ventral view (B, F, J), dorsal view (C, G, K), and dorsoapical view (D, H, L), showing a dorsal view of the dorsoapical lobe. Abbreviations: go, gonopore; others are the same as in Fig. 4.