Lesticus attenuatus, Fedorenko, 2022

Fedorenko, D. N., 2022, New or little-known Lesticus Dejean, 1828 (Coleoptera: Carabidae: Pterostichini) from Vietnam, Russian Entomological Journal 31 (3), pp. 260-275 : 270-272

7. Lesticus buqueti (Laporte de Castelnau, 1834)

Figs 10 , 22 , 40–41 . Laporte de Castelnau, 1834: 77 ( Trigonotoma ; Java ); Chaudoir, 1878: 31, 33; Bates, 1889a: 105; 1889b: 276; Tschitschérine, 1900: 177, 191; Kuntzen, 1914: 54, 58; Csiki, 1929: 519: 353; Andrewes,

1933: 353; Roux et al., 2016: 452. — viridicollis (non Macleay, 1825): Brullé, 1835: 333; Chaudoir, 1868: 154. — chalcothorax Chaudoir, 1868: 153 ( Triplogenius ; ‘Cochinchine et le Cambodje’); 1878: 31; 1889b: 276; Kuntzen, 1911: 165; Roux et al., 2016: 334; Zhu et al., 2018: 157, syn.n. — stephanschoedli Kirschenhofer, 2005: 17 (Mindanao, Philippines); Dubault et al., 2011: 133; Roux et al., 2016: 486; Lassalle et Schnell, 2019: 4, syn.n. — salvazai Dubault et al., 2012: 131 (Hue, Annam); Roux et al., 2016: 326, syn.n. — kangeanensis Dubault et al., 2012: 126 (Is. Kangean, Java ); Roux et al., 2016: 442, syn.n. — ? lombokensis Kirschenhof- er, 2007: 3 (Lombok); Roux et al., 2016: 418. — ? aruensis Dubault et al., 2013: 207 (Sumbawa!, not Aru Is., New Guinea); Roux et al., 2016: 498. — ? samaricus Lassalle et Schnell, 2019: 4 (Samar, Philippines).

MATERIAL. 7♂♂, 4♀♀ ( SIEE), Vietnam , Ha Giang Province, Bat Dai Son Natn. Park, Thanh Van env., h~ 950 m, 23°06´01´´N 104°58´25´´E, cornfield, 14–22.IV.2022 (D. Fedorenko); 3♂♂, 2♀♀ ( SIEE) , Dong Nai Province, Cat Tien National Park , at light HQL 450, 18–20.X. or 3–4.XII.2004, or 17.V–18.VI.2005 (D. Fedorenko). 26 specimens ( ZIN) determined as L. chalcothorax (10) or L. buqueti (16): ♂, 2♀♀, ‘ Annam / Phuc Son / Nov. Dez. / H.Fruhstorfer’; ♂ ♀, ‘Saïgon’, ‘Ex Mus. Bates’; ♀, ‘Cochinchine’; ♀, ‘Cochinchinea’; ♂, ‘Quantri/ Annam’; ♂, ‘ Cambodia / Poliakow’; 2♀♀, ‘ Sumatra / A.Koller’,‘ Tr.Bugueti Cast. / T.Tschitscherin / determ. 1901’; ♀, ‘18121’, ‘ Java occid./ Fruhstorfer. 92’; 2♀♀, ‘ Java merid./ Palabuan 1892’, ‘ H. Donkier 1894’; ♀, ‘ Java occident./ Sukabumi 2000" 1893’, ‘ H. Donkier 1894’; 6♂♂, 3♀♀, ‘Ins. Java / (Staudinger)’, ‘1907, к[оллекциЯ]. Чичерина.’. — Internal sac of aedeagus examined in seven males, three from Java and four from Vietnam .

DIAGNOSIS. Rather a slender, medium-sized, macropterous species with long metepisterna. Body dorsum mostly not bright metallic, with elytra black and pronotum rather deep green. Protarsomere 1 without ventral pad in female; metatarsus without or, mostly, with blunt anterolateral carina. Internal sac of aedeagus ( Figs 40–41 ) dorsal, with a large, bifid, basal bulb.

DESCRIPTION. BL 20–23 mm. Dorsum moderately shiny, barely less so in female than in male; head and pronotum green or purple green, without or with cupreous reflections, to deep green or black, or bluish green; elytra black or with slight green or violaceous luster. Microsculpture isodiametric, almost indistinct to missing, on head; superficial, consisting of wide rectangular meshes on pronotum; isodiametric on elytra. Dorsal micropunctation dense.

Head ( Fig. 10 ). Eyes large, genae short to indistinct. Frontal sulci sinuous, impressed in form of large and deep pits on a level with anterior supra-ocular seta, deep and parallel before, shallow behind, being reduced to 2–3 short and oblique impressed lines on each side. Neck constriction shallow. Antennae rather short, with about apical 1.5 segments surpassing elytral base. Terminal maxillary palpomere subtriangular, two fifths (♀) or more than a half (♂) as wide at apex; terminal labial palpomere widely triangular, lp3W/L 0.48–0.62 (♀) or 0.78–1.0 (♂).

Pronotum ( Fig. 22 ) subquadrate, broadest slightly before middle, with sides straight or indistinctly sinuate in front of basal angles. Base 1/3–2/5 wider than apex, basal angles obtuse, blunt or rounded. Lateral bead narrow in apical three fourth, broadened in basal fourth. Basal foveae moderately deep, flat or barely concave, smooth or slightly rugulose, or distinctly punctate, with some punctures inside inner basal sulci; these more or less converging apicad, running on basal two fifths. Median line deep, obliterate basally and apically.

Elytra parallel-sided or almost so, longer in male than in female (Tab. 1). Basal ridge inwardly reaching stria 1 or 2, or 3; humeral angle obtuse. Striae deep, mostly finely to almost indistinctly punctate, intervals nearly flat to convex. Interval 3 with three discal setae. USS: 19–22.

Propleura, sides of metaventrite, mes- and metepisterna, and abdominal sternite II moderately punctate. Metepisternum long to very long, est3L/W ratio1.30–1.64.

Legs. Meso- and metatarsi with blunt lateral carina, sometimes without this carina due to vague dorsolateral sulcus. Mesofemur with 2–5, mostly 3–4, anteroventral setae.

GEOGRAPHIC DISTRIBUTION. Throughout the Oriental region east of India: Indochina to southern China, the Sunda Isles (not reported from Celebes) east to at least Sumbawa; the Philippines.

HABITATS AND HABITS. In the Bat Dai Son National Park, this species was found to be rather common in cornfields which habitat it shared with other two trigonotomines, Trigonotoma chrysites Bates, 1892 , and Pareuryaptus chalceolus (Bates, 1873) .

COMMENTS. My comparison has revealed no substantial difference between L. buqueti from Java and L. chalcothorax from Vietnam. This also is true of L. stephanschoedli and L. kangeanensis for which endophalli have been illustrat- ed [ Dubault et al., 2011; Roux et al., 2016]. Besides, type specimens of L. lombokensis , L. aruensis and L. samaricus as illustrated in Roux et al. [2016: Figs 419 and 499] and in Lassalle et Schnell [2019: Fig. 7 ] are very similar both inter se and hardly different from the species discussed above in appearance. The results obtained incline me to recognize all the species mentioned above as new or probable junior synonyms; all these taxa are allopatric ‘species’ of which most have been described just recently, including many from neighbouring Sunda or Philippine islands, such as Kangean, Lombok and Sumbawa or Mindanao and Samar. Finally, all or some of the following four species, L. obtusus Dubault et al., 2012 from Borneo, L. pulchellus Dubault et al., 2012 from Singapore, L. samarensis Dubault et al., 2011 and L. pseudocupreatus Dubault et al., 2011 from Samar or Negros, Philippines, seem to be very similar species if not the next probable synonyms.

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Figs 46–54. Lesticus spp. , females: 46–48, 54 — L. attenuatus sp.n.; 49–50 — L. auricollis ; 51–53 — L. lakhonus ; 46, 51 — urite IX and reproductive tract; 47, 50, 52 — sternite VIII; 48, 49, 53 — tergite VIII; 54 — left protarsus; bc — bursa copulatrix; ov — common oviduct; sg — spermathecal gland; sp — spermatheca. Scale bar 1 mm.

Рис. 46–54. Lesticus spp. , самки: 46–48, 54 — L. attenuatus sp.n.; 49–50 — L. auricollis ; 51–53 — L. lakhonus ; 46, 51 — урит IX и репродуктивный тракт; 47, 50, 52 — стернит VIII; 48, 49, 53 — тергит VIII; 54 — леваЯ переднЯЯ лапка; bc — копулЯтивнаЯ сумка; ov — непарный Яйцевод; sg — желеЗа сперматеки; sp — сперматека. МасШтаб: 1 мм.

Of the species discussed, L. aruensis was described without type locality indicated, and re-described [ Roux et al., 2016] as occurring on the Aru Island, ‘Région néo-guinéenne’. The holotype of this species and that of another one, L. andrewesi (Straneo, 1938) described from Sumbawa with certainty, have identical labels ‘B.Aroe Hassa/ Sumbawa 2- 5000´/ Doherty IX.X’ [ Roux et al., 2016: 385, 499]. This means that Sumbawa is the type locality for both, which thereby deletes the genus Lesticus from faunal list of New Guinea.

The only difference has been found for two populations of L. buqueti far apart, i.e., the elytra being barely longer in adults from Java than in those from Vietnam (Tab. 1).

Figures

Figs 1–12. Head: 1–2 — Lesticus nubilus, 2♂♂; 3 — L. attenuatus sp.n., ♂ paratype; 4 — L. p. praestans, ♂ from Cuc Phuong NP, Vietnam; 5 — L. p. mouhotii, ♀ from Mondulkiri Prov., Cambodia; 6 — L. auricollis, ♂ from Bac Giang Prov., Vietnam; 7–8 — L. verticillatus sp.n., ♂ paratype from Song Thanh NP and ♂ holotype; 9 — L. bellus sp.n., ♀ holotype; 10 — L. buqueti, ♀; 11 — L. lakhonus, ♀; 12 — L. laevis sp.n., ♂ holotype; 1, 10–11 — Cat Tien NP, Vietnam; 2 — Mae Vong env., Thailand. Рис. 1–12. Голова: 1–2 — Lesticus nubilus, 2♂♂; 3 — L. attenuatus sp.n., паратип ♂; 4 — L. p. praestans, ♂ иЗ Нац. парка Кыкфыонг, Вьетнам; 5 — L. p. mouhotii, ♀ иЗ пров. Мондулкири, Камбоджа; 6 — L. auricollis, ♂ иЗ пров. БакЗЯн, Вьетнам; 7–8 — L. verticillatus sp.n., паратип ♂ иЗ нац. парка Сонгтхань и голотип ♂; 9 — L. bellus sp.n., голотип ♀; 10 — L. buqueti, ♀; 11 — L. lakhonus, ♀; 12 — L. laevis sp.n., ♂ голотип; 1, 10–11 — Нац. парк Катьен, Вьетнам; 2 — окр. Мае Вонг, Таиланд.

Figs 13–24. Pronotum: 13–14 — Lesticus nubilus, 2♂♂; 15 — L. attenuatus sp.n., ♂ paratype; 16 — L. p. praestans, ♂ from Cuc Phuong NP, Vietnam; 17 — L. p. mouhotii, ♀ from Mondulkiri Prov., Cambodia; 18 — L. auricollis, ♂ from Bac Giang Prov., Vietnam; 19– 20 — L. verticillatus sp.n., ♂ paratype from Song Thanh NP and ♂ holotype; 21 — L. bellus sp.n., ♀ holotype; 22 — L. buqueti, ♀; 23 — L. lakhonus, ♀; 24 — L. laevis sp.n., ♂ holotype; 13, 22–23 — Cat Tien NP, Vietnam; 14 — Mae Vong env., Thailand. Рис. 13–24. Переднеспинка: 13–14 — Lesticus nubilus, 2♂♂; 15 — L. attenuatus sp.n., паратип ♂; 16 — L. p. praestans, ♂ иЗ Нац. парка Кыкфыонг, Вьетнам; 17 — L. p. mouhotii, ♀ иЗ пров. Мондулкири, Камбоджа; 18 — L. auricollis, ♂ иЗ пров. БакЗЯн, Вьетнам; 19–20 — L. verticillatus sp.n., паратип ♂ иЗ нац. парка Сонгтхань и голотип ♂; 21 — L. bellus sp.n., голотип ♀; 22 — L. buqueti, ♀; 23 — L. lakhonus, ♀; 24 — L. laevis sp.n., ♂ голотип; 13, 22–23 — Нац. парк Катьен, Вьетнам; 14 — окр. Мае Вонг, Таиланд.

Figs 40–45. Aedeagus, median lobe with everted and inflated internal sac: 40–41 — Lesticus buqueti, ♂♂ from Java (40) or Vietnam (41); 42–43 — L. lakhonus; 44–45 — L. laevis sp.n., holotype; 40–41, 43, 45 — right dorsolateral aspect; 42, 44 — left ventrolateral aspect; b, c, d, e — bulbs of internal sac. Scale bars 1 mm. Рис. 40–45. Эдеагус, среднЯЯ долЯ с вывернутым и надутым внутренним меШком: 40–41 — Lesticus buqueti, ♂♂ с Явы (40) и иЗ Вьетнама (41); 42–43 — L. lakhonus; 44–45 — L. laevis sp.n., голотип; 40–41, 43, 45 — справа и сверху; 42, 44 — слева и сниЗу; b, c, d, e — пуЗыри внутреннего меШка. МасШтаб: 1 мм.