Pterostichus (Nialoe) asahinus Habu & Baba, 1960

Sasakawa, Koji & Mitsuduka, Yoshiji, 2023, A morphology-based revision and phylogenetic analysis of the Pterostichus macrogenys species group (Coleoptera, Carabidae) and implications for differentiation of the species group, Deutsche Entomologische Zeitschrift 70 (2), pp. 291-310 : 291

Pterostichus (Nialoe) asahinus Habu & Baba, 1960

Figs 2D , 4M-P , 6F-H

Materials examined.

1♂, Momoyake , alt. 1030 m, Yurihonjô-shi, Akita Prefecture, Japan (MGRS: 54 SVJ26680 29227; 39.1091115°N, 140.15197046°E), 24. vi-15. vii. 2021, subterranean baited trap, Y. Mitsuduka leg.

Notes.

The body lengths (mm) of the specimen are BLm 16.38, BLl 14.60 and BLc 14.06. This specimen was collected together with P. chokaisanus , which is to be recorded below. This is the first report of the sympatric occurrence of this species pair and provides evidence that they are reproductively isolated distinct species. Although the comparison was based on a single male for each species, a body-size difference was observed between the two species, with P. asahinus larger than P. chokaisanus . This collection record is the northernmost distribution record of the species and the first record for Akita Prefecture.

Figures

Figure 2. Habitus dorsal view of the Pterostichus macrogenys species group. A. Pterostichus namahage sp. nov. holotype male from Haraikawa; B. P. kamurosanus sp. nov. holotype male from Ariya; C. P. atsumidakensis sp. nov. holotype male from Take-no-koshi; D. P. asahinus male from Momoyake.

Figure 4. Endophallus of Pterostichus namahage sp. nov. holotype male from Haraikawa (A-D), P. kamurosanus sp. nov. holotype male from Ariya (E-H), P. atsumidakensis sp. nov. holotype male from Take-no-koshi (I-L) and P. asahinus male from Momoyake (M-P). Fully inflated endophallus in left lateral (A, E, I, M), apical (B, F, J, N), right lateral (C, G, K, O) and basal part in dorsal and apical part in ventral (D, H, L, P) views. Abbreviations: go - gonopore; lal - left apical lobe; lpb - left pigmented band; lpl - left pre-apical lobe; rpl - right pre-apical lobe.

Figure 6. Right paramere of Pterostichus namahage sp. nov. holotype male from Haraikawa (A), P. kamurosanus sp. nov. holotype male from Ariya (B), P. atsumidakensis sp. nov. holotype male from Take-no-koshi (C-E), P. asahinus male from Momoyake (F-H), P. chokaisanus male from Momoyake (I), P. chokaisanus male from Zao-chuo-kogen (J), P. kitakamisanus male from Odateminami (K, L) and P. kitakamisanus holotype male from Genbeidaira (M). Left lateral (A-C, F, I-K), right lateral (L, M), apical part in apical and basal part in ventral (D, G) and apical part in dorsal (E, H) views.