Trigonotoma aurifera Tschitschérine, 1900

Fedorenko, D. N., 2024, Notes on Trigonotoma and Pareuryaptus (Coleoptera: Carabidae: Pterostichini) from Vietnam, Russian Entomological Journal 33 (1), pp. 43-71 : 47

[2. Trigonotoma aurifera Tschitschérine, 1900 , stat. rest.]

Figs 1 , 8, 16, 24 , 38 , 41–42 , 50, 55 , 59–61.

Tschitschérine, 1900: 155 (‘Cambodge’); Csiki, 1929: 516; Lesne, 1904: 77; Dubault et al., 2010a: 21; Roux et al., 2016: 162.

MATERIAL. 4♂♂, ( ISEA, SIEE): ♀ Thailand, Prov. Nakhon Savan , 13 km N of Mae Wong vill., 15°54′N 99°33′44″E, h~ 110 m, banana plantation, 12.VIII.2009 (V.K. Zinchenko) ; ♂, Chiang Mai Province, Seat Doi Saket , 18°52′N 99°8′E, 2012 (local collector) ; ♂ ( SIEE), near Chiang Mai, VIII.2005 (A. Sokolov) ; ♂, Lampang Province, Seat Wang Nuea , 19°8′N 99°37′E, 2012 (local collector) ; ♂, Buriram Province, Hevea brasiliensis plantation, 13–14.VII.2013 (A.V. Korshunov) .

Aedeagus and internal sac examined in four or two males, respectively; genitalia and reproductive tract examined in the female.

DIAGNOSIS.As for T. nitidicollis , except for internal sac of aedeagus as illustrated in Roux et al. [2016: 161]: it is different in shape and has two, large, contiguous clusters of multiple, long and dense, spicules ( Figs 59–61 ). In general, sides of pronotum very slightly sinuate in front of base ( Fig. 1 ), pronotal basal angles less rounded; elytra with slight yet distinct violaceous lusre, which is more distinct along reflexed lateral margins; elytral striae more coarsely punctate and deeper, resulting in the intervals being slightly more convex. Elytral microsculpture barely more transverse, consisting of slightly transvese to isodiametric meshes. Female bursa copulatrix shorter ( Fig. 38 ).

REDESCRIPTION. As for T. nitidicollis except diagnostic features above. BL 24.2–27 mm. Metatarsomere 1 with 3– 4 anterolateral and no posterolateral setae.

GEOGRAPHIC DISTRIBUTION. Indochina ( Myanmar, Thiland, Cambodia,? Laos); unknown to me from Vietnam.

HABITATS AND HABITS. The label data of the specimens listed point rather to eurybiotic habits of this species.

COMMENTS. The specimens listed match well the original description, including two distinctive features such as distinct basal angles of the pronotum and the elytra with some purple luster, whereas T. nitidicollis has the basal angles rounded and the elytra black. Therefore it is here identified as T. aurifera which invites this name to be resurrected from synonymy of T. nitidicollis .

Trigonotoma confusa Dubault et al., 2010 , from ‘Bhamo’, Myanmar, is very similar except only that it has the body barely smaller, BL 21–23 mm, and the metatarsomere 1 externally sulcate. Roux et al. [2016] mention the latter character in the key, but they wrongly mention asulcate metatarsomere 1 in the re-description.

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 7–30. Pregenital abdominal segments in females of Trigonotoma and Pareuryaptus: 7, 15, 23 — T. nitidicollis; 8, 16, 24 — T. aurifera; 9, 17, 25 — T. chrysites; 10, 18, 26 — T. lewisii; 11, 19, 27 — P. aethiops; 12, 20, 28 — P. parvus; 13, 21, 29 — P. morosus (= adoxus); 14, 22, 30 — P. chalceolus; 7–14 — tergite VII; 15–22 — tergite VIII; 23–30 — sternite VIII. Scale bars 1 mm. Рис. 7–30. Прегенитальные сегменты брюшка самок Trigonotoma и Pareuryaptus: 7, 15, 23 — T. nitidicollis; 8, 16, 24 — T. aurifera; 9, 17, 25 — T. chrysites; 10, 18, 26 — T. lewisii; 11, 19, 27 — P. aethiops; 12, 20, 28 — P. parvus; 13, 21, 29 — P. morosus (= adoxus); 14, 22, 30 — P. chalceolus; 7–14 — тергит VII; 15–22 — тергит VIII; 23–30 — стернит VIII. Масштаб: 1 мм.

Figs 31–38. Tergite IX and reproductive tract in females of Trigonotoma and Pareuryaptus: 31 — T. nitidicollis; 32 — P. parvus; 33 — P. morosus (= adoxus); 34 — P. aethiops; 35 — P. chalceolus; 36 — T. lewisii; 37 — T. chrysites; 38 — T. aurifera; bc — bursa copulatrix; ov — common oviduct; rp — receptacle; sc — seminal canal; sg — spermathecal gland; sgd — spermathecal gland duct; sp — spermatheca. Scale bars 1 mm. Рис. 31–38. Тергит IX и репродуктивный тракт самок Trigonotoma и Pareuryaptus: 31 — T. nitidicollis; 32 — P. parvus; 33 — P. morosus (= adoxus); 34 — P. aethiops; 35 — P. chalceolus; 36 — T. lewisii; 37 — T.chrysites; 38 — T. aurifera; bc — копулЯтивнаЯ сумка; ov — непарный Яйцевод; rp — семеприемник; sc — семепровод; sg — желеЗа сперматеки; sgd — проток желеЗы сперматеки; sp — сперматека. Масштаб: 1 мм.

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 59–64. Aedeagus, median lobe with everted and inflated internal sac: 59–61 — Trigonotoma aurifera; 62–44 — T. nitidicollis; 59, 62 — left aspect; 61, 64 — right aspect; 60, 63 — dorsal aspect; ds — dorsal sclerite. Scale bars 1 mm. Рис. 59–64. Эдеагус, среднЯЯ долЯ с вывернутым и надутым внутренним мешком: 59–61 — Trigonotoma aurifera; 62–44 — T. nitidicollis; 59, 62 — слева; 61, 64 — справа; 60, 63 — сверху; ds — дорЗальный склерит. Масштаб: 1 мм.