Micronialoe, Park, Kwon & Lafer, 1996

Kim, Dooyoung & Suh, Sang Jae, 2024, Review of the ground beetle subgenus Micronialoe from Korea, with a description of a new species (Coleoptera: Carabidae: Pterostichus), Zootaxa 5471 (4), pp. 451-464 : 461

Key to the species of the subgenus Micronialoe

1. Pronotum with rudimentary or without outer basal fovea ( Fig. 8C ); median lobe of aedeagus rather slender, apical orifice on dorsal side ( Figs 8E–H )........................................... P. (M.) chogyesanus Park, Kwon & Lafer, 1996

- Pronotum with outer basal fovea more or less distinct ( Figs 2C , 7C ); median lobe of aedeagus stout, apical orifice bent to left ( Figs 5A–E , 7E–I ).................................................................................... 2

2. Median lobe of aedeagus truncate at apex in dorsal view, left lateral margin below apical orifice almost linear, internal sac with three sclerotized areas ( Figs 5A–E )......................................... P. (M.) spinulosus Kim & Suh sp. nov.

- Median lobe of aedeagus rounded at apex in dorsal view, left lateral margin below apical orifice convex, internal sac with two sclerotized areas ( Figs 7E–I ) (sclerotized parts for P. (M.) kaniei is unknown)...................................... 3

3. Pronotum with vague outer basal fovea; smaller species (6.1–7.0 mm); distributed in Is. Tsushima, Japan.............................................................................................. P. (M.) kaniei Morita, 2005

- Pronotum with distinct outer basal fovea ( Fig. 7C ); larger species (>7.0 mm); distributed in Mt. Jirisan, Korea........................................................................... P. (M.) bifoveolatus Park, Kwon & Lafer, 1996

Figures

FIGURE 2. Pterostichus (Micronialoe) spinulosus sp. nov., male. (A) habitus, dorsal view; (B) ditto, ventral view; C head and pronotum, dorsal view. Scale bars: 1 mm.

FIGURE 5. Male and female genitalia of Pterostichus (Micronialoe) spinulosus sp. nov., male A–H, female (I). (A) median lobe of aedeagus, right lateral view; (B) ditto, dorsolateral view; (C) ditto, dorsal view; (D) ditto, ventral view; (E) ditto, left lateral view; (F) left paramere; (G) right paramere; (H) male sternite IX; (I) female genitalia (laterotergite, basal stylomere, and apical stylomere), ventral view. Scale bars: 0.3 mm A–E, H; 0.2 mm F, G, 0.1 mm I. Abbreviations: SP: spiny patch; VS: ventral sclerite; CS: C-shaped sclerite; C: ventral carina.

FIGURE 7. Male habitus and genitalia of Pterostichus (Micronialoe) bifoveolatus Park, Kwon & Lafer. (A) habitus, dorsal view; (B) habitus, ventral view; (C) head and pronotum, dorsal view; (D) sternite VII; (E) median lobe of aedeagus, right lateral view; (F) median lobe of aedeagus, dorsolateral view; (G) median lobe of aedeagus, dorsal view; (H) median lobe of aedeagus, ventral view; (I) median lobe of aedeagus, left lateral view; (J) left paramere; (K) right paramere. Scale bars: 1 mm A–C; 0.5 mm D; 0.3 mm E–I; 0.2 mm J–K. Abbreviations: VS: ventral sclerite; CS: C-shaped sclerite; C: ventral carina.

FIGURE 8. Male habitus and genitalia of Pterostichus (Micronialoe) chogyesanus Park, Kwon & Lafer. (A) habitus, dorsal view; (B) habitus, ventral view; (C) head and pronotum, dorsal view; (D) sternite VII; (E) median lobe of aedeagus, right lateral view; (F) median lobe of aedeagus, dorsal view; (G) median lobe of aedeagus, ventral view; (H) median lobe of aedeagus, left lateral view; (I) left paramere; (J) right paramere. Scale bars: 1 mm A–C; 0.5 mm D; 0.3 mm E–H; 0.2 mm I–J. Abbreviation: CS: C-shaped sclerite.