Pareuryaptus exiguus Dubault, Lassalle et Roux, 2008

Fedorenko, D. N., 2024, Notes on Trigonotoma and Pareuryaptus (Coleoptera: Carabidae: Pterostichini) from Vietnam, Russian Entomological Journal 33 (1), pp. 43-71 : 57-59

1. Pareuryaptus exiguus Dubault, Lassalle et Roux, 2008

Fig. 81 .

Dubault et al., 2008: 201 (Ha Giang); Roux et al., 2016: 60; Li et al., 2022: 8.

MATERIAL. ♀ ( SIEE), Vietnam, Hoa Binh Province, Mai Chau env., Chieng Chau Vill., 20°38′57″N 105°03′59″E, h= 180 m, at light, 17–24.IV.2019 (A. Prosvirov) ; 2♀♀ ( SIEE), Ninh Binh Province, 4.5 km SW of Ninh Binh, Thon Ka Luong Vill., 20°13′30″N 105°56′11″E, h= 130 m, at light, 26–30. IV.2019 (A. Prosvirov).

DIAGNOSIS. A slender species with mandibles slender, left mandible straight at left margin; antennal scape barely longer than antennomeres 2 and 3 combined (a1L/a2– 3L~1.05); pronotum subquadrate and rather narrow ( Fig. 81 ), with sides straight or indistinctly sinuate in front of base; base impunctate between basal foveae, basal angles obtuse, blunt or rounded, with seta just in the angle, median line obliterate at base. Elytral microsculpture isodiametric.

Similar to P. lucidus (Andrewes, 1931) from Sumatra, from which it is distinctive chiefly in having less distinct basal angles of the pronotum [Dubault et al., 2008].

REDESCRIPTION. Some details only. BL 11.5–13.9 mm. Body dorsum black.

Apical two maxillary palpomeres rather short, palpomere 3 barely shorter than palpomere 4, which is parallel-sided or very slightly dilated apicad, ca. 2.5 times as long as wide.Pronotum subquadrate, lateral bead only slightly dilated in basal half, not dilated there toward base. Lateral groove finely,very densely to confluently punctate at bottom in front of basal foveae; these moderately deep, almost flat, rather wide and sparsely rugose-punctate; inner basal sulcus in form impressed line, about as deep as outer one. Elytra slightly more than a fourth (vs. not more than two fifths in the othe congeners) wider than pronotum. Posterior inclination of prosternal process wide and rounded (widely costate).

For aedeagus see Lee et al., [2022].

GEOGRAPHIC DISTRIBUTION. Described based on the only female from Vietnam; recorded in Guangxi, China, yet absent from distribution map of the genus [Lee et al., 2022], this being a lapse.

HABITATS AND HABITS. No data except that adults flight to lights at night.

Figures

Figs 81–92. Pronotum: 81 — Pareuryaptus exiguus from Mai Chau; 82–83 — P. aethiops; 84–86 — P. glastenvalum from Pai, Thailand; 87 — P. c. cambodgiensis; 88 — P. c. luangphabangensis from Phong Nha - Kebang NP; 89 — P. parvus; 90 — P. morosus (= adoxus); 91 — P. morosus; 92 — P. chalceolus from Bat Dai Son NP; 82–83, 87, 89–91 — specimens from Cat Tien NP. Рис. 81–92. Переднеспинка: 81 — Pareuryaptus exiguus иЗ Mai Chau; 82–83 — P. aethiops; 84–86 — P. glastenvalum иЗ Pai, Таиланд; 87 — P.c. cambodgiensis; 88 — P. c. luangphabangensis иЗ Нац. парка Phong Nha - Kebang; 89 — P.parvus; 90 — P.morosus (= adoxus); 91 — P. morosus; 92 — P. chalceolus иЗ Нац. парка Bat Dai Son; 82–83, 87, 89–91 — ЭкЗ. иЗ Нац. парка Cat Tien.