Trigonotoma lewisii Bates, 1873

Fedorenko, D. N., 2024, Notes on Trigonotoma and Pareuryaptus (Coleoptera: Carabidae: Pterostichini) from Vietnam, Russian Entomological Journal 33 (1), pp. 43-71 : 47-49

[3. Trigonotoma lewisii Bates, 1873 ]

Figs 10, 18, 26 , 36 , 45–46 , 51, 56 , 73–74.

Bates, 1873: 284 (‘Hiogo; Nagasaki, …’); Bates, 1890: 105 (part.); Zhu et al., 2020: 51, 61. — lewisi : Harold, 1877: 339; Chaudoir, 1878: 33; Kuntzen, 1911: 182; 1914: 63; Csiki, 1929: 517; Andrewes, 1930: 355; Jedlička, 1962: 319; Dubault et al., 2007: 216; 2010b: 115 (part.); Roux et al., 2016: 168 (part.).

MATERIAL. 14 specimens ( ZIN): 2♂♂, ♀, Japan (Coll. Bates) ; ♂, Nagasaki (Coll. Bates); 2♀♀, Shizuoka, env. Izu-Nagaoka, Mt. Katsuragiyama, 23.II.1964 (R. Ishikawa); ♀, Aichi, Hoi Co., Mt. Miyajiyama, 1.III.1964 (R. Ishikawa); ♂, ♀, Mt. Kongo, 10.XI.1963 ; China: ♀, Mandzhuria (Coll. Lésileac) ; 2♂♂, ‘г[ора]. Я- чжоу, О- минь- сЯнь (Сычуань), 29.III–5.IV.1893, Потанин’ [= Ya’an, Emeishan, Sichuan (G.N. Potanin) ]; 2♂♂, same data, except for ‘Дол[ина]. р. Я [= Min Jiang?] ’; ♀ ( SIEE), NE Guangxi, 15 km N of Langsheng, 1.000 m, 15–22.V.1995 (S. Kurbatov).

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

DIAGNOSIS. A medium-sized macropterous species, with forebody dorsum bright metallic, cupreous green or golden green. Meso- and metatarsus with distinct and usually sharp lateral carina and sulcus above; metatarsomere 1 with one or more posterolateral setae. Aedeagus ( Fig. 56 ) densely, vaguely to rather distinctly striated along left lateral third of ventral side; apex quadrate in right dorsolateral view, with right margin angulate outside oblique dorsal ridge; internal sac tubiform, slightly broadened across base, without well-differentiated bulbs ( Figs 73–74 ).

REDESCRIPTION. For recognition only. Just as for T. nitidicollis and T. aurifera , excepting body smaller, BL 17– 18.5 mm, sometimes 15.4 mm. Elytra with slight violaceous luster. Pronotal microsculpture superficial yet mostly traceable, consisting of moderately transverse meshes; elytral sculpticells very small, transverse and narrow. Scape just as long as antennomeres 2–4 combined in more than 80% of the specimens measured.

Female bursa copulatrix short ( Fig. 38 ).

GEOGRAPHIC DISTRIBUTION. Widespread in China (including Taiwan) to Japan (Kyushu and Honshu), supposedly south of the Yangtze River in China, with all or most of the records in Yunnan referred probably to T. chrysites . For a distribution map see Zhu et al. [2020].

HABITATS AND HABITS. No data. Supposedly, eurybiotic at lower altitudes.

COMMENTS. This species is here accepted separate from T. bhamoensis and T. chrysites , which species have formerly been considered as conspecific with [ Dubault et al., 2010b] or subspecies of [ Roux et al., 2016] T. lewisii . Among them, T. bhamoensis is only distinctive in having a trapezoidal and longer (vs. quadrate) apex of the median lobe of aedeagus.

I have only seen a female paralectotype ( ZIN) of T. bhamoensis with the labels ‘Bhamò [= Bhanmo = Banmaw]/ Birmania / Fea IX 1886 ’ and ‘ Paralectotypus [red printed]’. It is more similar to T. piermorvani Dubault et al., 2010 described from Chiang May, northwestern Thailand, rather than T. lewisii and T. chrysites . Another female specimen from ZIN Collection, with similar labels ‘Bhamò / Birmania / Fea VIII 1886 ’ and ‘ Paratypus [red printed]’ proved a misidentified specimen of T. dohrnii .

To prevent some confusion in future, it is worthy of minute note that Dubault et al. [2007] designated the lectotype of T. lewisii , but then they [ Roux et al., 2016] wrongly mentioned the holotype of this species.

Figures

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 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.