Trigonotoma dohrnii Chaudoir, 1852

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

6. Trigonotoma dohrnii Chaudoir, 1852

Figs 6 , 47–48 , 53, 58 , 75–76.

Chaudoir, 1852: 71 ( Hongkong); 1968: 159; Bates, 1889: 275. — dohrni: Lesne, 1904: 77; Csiki, 1929: 516; Andrewes, 1924: 469; 1930: 353; Jedlička, 1962: 318; Roux et al., 2016: 166; Zhu et al., 2020: 51. — crenata Chaudoir, 1868 (‘Indes orientales’; dohrnii var. loc .?); Roux et al., 2016: 166.

MATERIAL. 20 specimens: 2♂♂ ( ZIN), China, without exact locality ; ♀ ( ZIN), Prov. Kwangsi, Nanning ; ♂, ♀ ( ZIN), ‘ Hong-Kong , coll. Bates’ ; ♂ ( ZIN), ‘Siam’ [= Thailand] ; ♂ ( SIEE), Central Laos, Vang Vieng , 30.III–5.IV.2010 (A. Sokolov) ; ♂ ( ZIN), Ventian, Kabakov ; ♀ ( SIEE), Cambodia, Mondulkiri Province, Sen Monorom , 19°29′02″N, 107°10′51″E, h~ 780 m, at light, 1–5.VI.2014 (I. Melnik) ; ♀ ( ZIN), [ Vietnam, Cao Bang Province] Bao Lac (Tonkin) ; ♂ ( ZIN), [Hoa Binh Province,] mountains at Cho Ben , 29.XI.1963 (O.N. Kabakov) [in russian] ; 3♂♂, ♀ ( SIEE), Ninh Binh Province, 7.5 km SSW of Nho Quan , 20°15′08″N, 105°44′09″E, h~ 100 m, at light, 1–5.V.2019 (A. Prosvirov) ; ♂ ( ZIN), [Nghe An Province,] Phuc Son ; ♂ ( ZIN), Dak Lak Province, Yok Don Natn. Park , 26.XI.1993 (Gorokhov) ; ♂ ( SIEE), Dong Nai Province, Cat Tien Nat. Park , 10.VI.2005, at light HQL450 (D. Fedorenko) ; ♀ ( ZIN), ‘ Saigon, coll. Bates’ ♂, ♀ ( ZIN), ‘ Cochinchine’ .

Aedeagus and internal sac examined in five or four males, respectively.

DIAGNOSIS. A medium-sized species with body rather uniform dark coloured and pronotum ( Fig. 6 ) very densely punctate along base; pronotal base wide; sides subsinuate in front of it; posterolateral seta much inside basal angle, these just traceable. Aedeagus ( Figs 75–76 ): median lobe smooth ventrally, apex in right dorsolateral view subquadrate and curved to the right; internal sac tubiform, without well-differentiated bulbs.

REDESCRIPTION. For recognition only. BL 19– 22.5 mm. Body dorsum deep metallic green, without or with purplish luster, or forebody very deep green to nearly black in couple with elytra black; elytra moderately shiny (♂) or dull (♀), with microsculpture barely transverse to isodiametric, rather superficial or coarse, respectively.

Pronotum subquadrate, sides subsinuate in front of base; base laterally oblique toward almost indistinct angles; posterolateral seta much inside these latter. Base moderately and very densely to confluently punctate. Basal foveae flat to subconvex, basal sulci a third as long as pronotum, inner sulci deep, slightly converging apicad, outer ones more shallow.

Elytra very long, about three fourths as long as wide, broadest slightly behind middle. Basal ridge inwardly reaching stria 2. Striae deep, rather coarsely punctate. Intervals convex, more so toward apex.

Mesotarsi without, metatarsomere 1 in basal half with very weak lateral carina and sulcus, these being very blunt or very shallow, respectively. Metatarsomere 1 with 2–4 antero- and 0–1 posterolateral setae.

GEOGRAPHIC DISTRIBUTION. Indochina from Myanmar to Vietnam and China south of the Yangtze River.

HABITATS AND HABITS. No data, except that most specimens were collected at lower altitudes, at lights in the night-time.

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 39–48. Median lobe of aedeagus: 39–40 — Trigonotoma nitidicollis; 41–42 — T. aurifera; 43–44 — T. lewisii; 45–46 — T. chrysites; 47–48 — T. dohrnii; 39, 41, 43, 45, 47 — left aspect; 40, 42, 44, 46, 48 — right aspect. Scale bars 1 mm. Рис. 39–48. СреднЯЯ долЯ Эдеагуса: 39–40 — Trigonotoma nitidicollis; 41–42 — T. aurifera; 43–44 — T. chrysites; 45–46 — T. lewisii; 47–48 — T. dohrnii; 39, 41, 43, 45, 47 — слева; 40, 42, 44, 46, 48 — справа. Масштаб: 1 мм.

Figs 49–58. Median lobe of aedeagus: 49, 54 — Trigonotoma nitidicollis; 50, 55 — T. aurifera; 51, 56 — T. lewisii; 52, 57 — T. chrysites; 53, 58 — T. dohrnii; 49–53 — dorsal aspect; 54–58 — ventral aspect. Scale bars 1 mm. Рис. 49–58. СреднЯЯ долЯ Эдеагуса: 49, 54 — Trigonotoma nitidicollis; 50, 55 — T. aurifera; 51, 56 — T. lewisii; 52, 57 — T. chrysites; 53, 58 — T. dohrnii; 49–53 — сверху; 54–58 — сниЗу. Масштаб: 1 мм.

Figs 65–76. Aedeagus, median lobe with everted and inflated internal sac: 65–72 — Trigonotoma chrysites (65–66 — ♂ from Kon Ka Kinh NP; 67–68 — ♂ from Vu Quang NP; 69–70 — ♂ from Xuan Son NP; 71–72 — ♂ from Bat Dai Son NP); 73–74 — T. lewisii, male from ‘Japan’; 75–76 — T. dohrnii; 65, 67, 69, 71, 73 — left dorsolateral aspect; 66, 68, 70, 72, 74 — left aspect; 75 — ventral aspect; 76 — dorsal aspect. Scale bars 1 mm. Рис. 59–64. Эдеагус, среднЯЯ долЯ с вывернутым и надутым внутренним мешком: 65–72 — Trigonotoma chrysites (65–66 — ♂ иЗ Нац. парка Kon Ka Kinh; 67–68 — ♂ иЗ Нац. парка Vu Quang; 69–70 — ♂ иЗ Нац. парка Xuan Son; 71–72 — ♂ иЗ Нац. парка Bat Dai Son); 73–74 — T. lewisii, ♂ иЗ ‘Японии’; 75–76 — T. dohrnii; 65, 67, 69, 71, 73 — слева и сверху; 66, 68, 70, 72, 74 — слева; 75 — сниЗу; 76 — сверху. Масштаб: 1 мм.