Trigonotoma perraudieri Bates, 1889

Fedorenko, D. N., 2024, Notes on Trigonotoma and Pareuryaptus (Coleoptera: Carabidae: Pterostichini) from Vietnam, Russian Entomological Journal 33 (1), pp. 43-71 : 51

7. Trigonotoma perraudieri Bates, 1889

Figs 3 , 77–80 .

Bates, 1889: 275 (‘Mytho’ [= My Tho, southern Vietnam]); Tschitschérine, 1900: 155; Andrewes, 1930: 355; Jedlička, 1962: 317; Roux et al., 2016: 140. — perrandieri: Kuntzen, 1911: 182. — perroudieri: Kuntzen, 1914: 73.

MATERIAL. Seven specimens, 2♂♂, 5♀♀, including: ♂ ( ZIN), ‘ Siam [= Thailand], coll. Bates’ ; ♂, Lampang Province, Wang Nuea , 19°8′N, 99°37′E, V.2011 (local collector); ♀ ( ZIN), ‘Cochinchine [= southern Vietnam], Vignes, 1898’; ♀ ( ZIN), Saigon (Coll. Lésileac) .

Aedeagus and internal sac examined in one male.

DIAGNOSIS.A large-sized clone of T. dohrnii , except that the pronotum is impunctate between the basal foveae. Aedeagus and its internal sac very characteristic ( Figs 77–80 ): apex of median lobe in dorsal view straight, subquadrate and rounded; internal sac double, consisting of two separate parts, basal and apical, the latter with a large left basal bulb and strong sclerite at its base.

REDESCRIPTION. Unnecessary here except as follows: BL 21–27.8 mm. Body dorsum uniform metallic green or bronzed; elytra shiny in male, with microsculpture distinct, consisting of barely transverse to isodiametric meshes.

Pronotum ( Fig. 3 ) with basal angles obtuse and rounded. Basal foveae more narrow while basal extension of lateral bead wider than in T. dohrnii , from nearly impunctate and transversely rugulose to finely and very densely punctate at bottom.

Elytral intervals convex, more so toward apex and toward lateral margin, to nearly flat on disc.

Tarsi neither laterally carinate nor sulcate. Metatarsomere 1 with 1–2 antero- and 1 posterolateral setae.

GEOGRAPHIC DISTRIBUTION. Thailand to Vietnam.

HABITATS AND HABITS. No data.

COMMENTS. Jedlička [1962] wrongly mentioned the type from ‘Siam’.

Figures

Figs 1–6. Head and pronotum: 1 — Trigonotoma aurifera, ♂ from Seat Doi Saket, Thailand; 2 — T. nitidicollis, ♂ from Phong Nha - Kebang NP; 3 — T. perraudieri, ♂ from Wang Nuea, Thailand; 4–5 — T. chrysites, ♂♂ from Bat Dai Son NP; 6 — T. dohrnii, ♂ from Nho Quan env. Рис. 1–6. Голова и переднеспинка: 1 — Trigonotoma aurifera, ♂ иЗ Seat Doi Saket, Таиланд; 2 — T. nitidicollis, ♂ иЗ Нац. парка Phong Nha - Kebang; 3 — T. perraudieri, ♂ иЗ Wang Nuea, Таиланд; 4–5 — T. chrysites, ♂♂ иЗ Нац. парка Bat Dai Son; 6 — T. dohrnii, ♂ иЗ окр. Nho Quan.

Figs 77–80. Trigonotoma perraudieri, median lobe of deagus with everted and inflated internal sac: 77 — left aspect; 78 — ventral aspect; 79 — dorsal aspect; 80 — right aspect. Scale bar 1 mm. Рис. 77–80. Trigonotoma perraudieri, среднЯЯ долЯ Эдеагуса с вывернутым и надутым внутренним мешком: 77 — слева; 78 — сниЗу; 79 — сверху; 80 — справа. Масштаб: 1 мм.