Stenaptinus lissoderus ( Chaudoir, 1850 )

Fedorenko, D. N., 2021, Stenaptinus (Coleoptera: Carabidae: Brachininae) of Vietnam. Note 2, Russian Entomological Journal 30 (1), pp. 25-42 : 30-32

2. Stenaptinus lissoderus ( Chaudoir, 1850)

Figs 2 , 12 , 29–30 , 64 , 98–102 .

Chaudoir, 1850: 79 ( Pheropsophus ; ‘Thibet’); 1876: 18, 24; Andrewes, 1930: 274; Venugopal et Thomas, 2019: 75. — picicollis Chaudoir, 1876: 44 ; Bates, 1892: 392; Andrewes, 1930: 275; Venugopal et Thomas, 2019: 79; syn.n. — javanus : Jedlička, 1964: 532 (part.).

MATERIAL. 3♂♂, 2♀♀ ( SIEE), India, N Goa State, Ashwem Beach Area, 24.I–26.III.2013 (A. Sokolov) ; 2 specimens ( SZM), N Goa, Calangut, near Hotel Vilage Royal , carrion traps, h= 9 m, 15.54°N / 73.77°E, 2–3.XI.2013 (V.K. Zinchenko) ; ♂ ( MSPU), Sri Lanka, Central Province, Peradeniya vill. , Botanical Garden , 15.I.1997 (A. Kuznetsov) ; ♀, same data, except for: Pidura Mt Ridge, Piduratalagala Mt , SSW slope, 2100 m, 20.I.1997 ; 2♀♀ ( SIEE), N Thailand, Mae Hong Son Province, env. Pai, 19°14´14´´N / 98°28´55´´E, h= 600 m, 28–29.IV.2013 (I. Melnik) ; 1 specimen ( SZM), Nakhon Ratchasima Province (Korat), Saeng Sang, Lam Sae Dam , Tha Plan National Park , h= 250 m, 14°16´40´´N / 102°25´28.5´´E, 7–8.VI.2010 (A.V. Korshunov).

Genitalia examined in three males and two females.

DIAGNOSIS. A fairly slender species with pronotum uniform red to black; elytra subparallel-sided, black, with a fairly wide transverse median band which is alternatively dentate anteriorly and posteriorly. Head entirely red to black between pronotum and frontoclypeal suture, with supra-antennal plates, sides of neck, and often also distinct to vague subtransverse patch on a level with anterior margin of eye pale. Female tergite VII with 9–12 straight apical setae, sternite VII mostly bisetose in male. Median lobe of aedeagus ( Figs 29–30 ) with apex strongly bent ventrad, pointed, more or less coarsely sculptured ventrally. Internal sac without right distal basal bulb, in lateral view with a preapical frontal bulb.

REDESCRIPTION. BL 15–17.7 mm (in specimens examined). Body pattern as in Figs 98–102 : elytron with humeral spot small or medium-sized; transverse median band reaching lateral margin or (mostly) not, more or less strongly dentate, often with teeth blunt or rounded apically; pale lateral margin missing to rather wide, merged into pale apical margin yet not reaching humerus. Head and pronotum glabrous, without or with several individual short setae, with setigerous punctures imperceptible.

Pronotum rather small and short, as wide as or barely wider than long, subcordate, broadest two fifths from apex, with sides subsinuate a fifth from base and rounded before; basal angles nearly right, with extreme apices blunted. Base slightly wider than apex. Lateral bead and groove distinct throughout.

Abdomen ( Figs 2 , 12 ): Tergite VII punctate as in S. javanus , larger punctures being sparser, finer and unevenly spaced in some males.

Internal sac of aedeagus ( Figs 29–30 ) in lateral view has body straight, with microtrichia moderately developed over the body which is incrassate medially and thence slightly separated from proximal basal bulbs; these in anterodorsal view more or less projecting laterad; left distal basal bulb only present; it is triangular, about as large as apex of median lobe in dorsal view.

Female gonocoxite IX ( Fig. 64 ) and reproductive tract as for S. javanus .

GEOGRAPHIC DISTRIBUTION. Throughout Hindustan (including Sri Lanka, Pakistan, Nepal, and Bhutan) and western Indochina east to Laos and south to the Malay Peninsula. The record of the species in Laos [ Andrewes, 1930] makes its occurrence not improbable in central or northern Vietnam.

HABITATS AND HABITS. No exact data.

COMMENTS. According to the descriptions, S. lissoderus is distinctive from S. picicollis in only having the head and pronotum entirely pale (vs. infuscated). My comparison of the holotype of S. lissoderus and a syntype of S. picicollis from Siam, as depicted in Venugopal and Thomas [2019: Figs 2A and 2C , respectively] with both each other and the specimens listed above has revealed no differences except in body colour. Because diferently coloured males from one and the same population as well as from different populations have similar aedeagi, the two names are here considered as conspecific and only referred to as different colour morphs, either pale (forma ‘lissodera’) or melanistic (forma ‘picicollis’).

Figures

Figs 1–10. Stenaptinus spp., sternite VIII in female: 1 — S. stenoderus; 2 — S. lissoderus; 3, 6 — S. agnatus from Cat Tien; 4 — S. sumatrensis sp.n.; 5 — S. c. consularis; 6 — S. montanus sp.n.; 7 — S. fimbriatus; 8 — S. consularis flaviceps ssp.n.; 9 — S. javanus; 10 — S. marginicollis. Scale bars: 1 mm. Рис. 1–10. Stenaptinus spp., стернит VIII самки: 1 — S. stenoderus; 2 — S. lissoderus; 3, 6 — S. agnatus иЗ Катьена; 4 — S. sumatrensis sp.n.; 5 — S. c. consularis; 6 — S. montanus sp.n.; 7 — S. fimbriatus; 8 — S. consularis flaviceps ssp.n.; 9 — S. javanus; 10 — S. marginicollis. МасШтаб: 1 мм.

Figs 11–20. Stenaptinus spp., tergite VIII in female: 11 — S. stenoderus; 12 — S. lissoderus; 13, 16 — S. agnatus from Cat Tien; 14 — S. sumatrensis sp.n.; 15 — S. c. consularis; 16 — S. montanus sp.n.; 17 — S. fimbriatus; 18 — S. consularis flaviceps ssp.n.; 19 — S. javanus; 20 — S. marginicollis; adr — apical depigmented region; psm — posteromedian sclerotized region. Scale bars: 1 mm. Рис. 11–20. Stenaptinus spp., тергит VIII самки: 11 — S. stenoderus; 12 — S. lissoderus; 13, 16 — S. agnatus иЗ Катьена; 14 — S. sumatrensis sp.n.; 15 — S. c. consularis; 16 — S. montanus sp.n.; 17 — S. fimbriatus; 18 — S. consularis flaviceps ssp.n.; 19 — S. javanus; 20 — S. marginicollis; adr — апикальнаЯ депигментированнаЯ область; psm — постеро-медиальнаЯ склеротиЗациЯ. МасШтаб: 1 мм.

Figs 29–42. Stenaptinus spp., median lobe of aedeagus with everted and inflated internal sac: 29–30 — S. lissoderus; 31–32 — S. c. consularis; 33–34 — S. c. flaviceps ssp.n.; 35–42 — S. stenoderus from Pu Mat (35, 40), Thailand (36–37), Ramnagar env. (38–39) and Song Thanh (41–42); 29, 31, 33, 36, 38, 40, 42 — dorso-apical aspect; 30, 32, 34–35, 37, 39, 41 — left aspect; fb — preapical frontal bulb. Scale bars: 1 mm. Рис. 29–42. Stenaptinus spp., среднЯЯ долЯ Эдеагуса с вывернутым и надутым внутренним меШком: 29–30 — S. lissoderus; 31– 32 — S. c. consularis; 33–34 — S. c. flaviceps ssp.n.; 35–42 — S. stenoderus иЗ Пумата (35, 40), Таиланда (36–37), окр. Рамнагара (38– 39) и СонгтханЯ (41–42); 29, 31, 33, 36, 38, 40, 42 — дорЗо-апикально; 30, 32, 34–35, 37, 39, 41 — слева; fb — предверШинный фронтальный пуЗырь. МасШтаб: 1 мм.

Figs 56–64. Stenaptinus spp., urite IX in female, ventral aspect: 56 — S. sumatrensis sp.n.; 57 — S. consularis flaviceps ssp.n. from Gia Lai Prov.; 58 — S. stenoderus; 59 — S. javanus; 60 — S. c. consularis; 61 — S. agnatus; 62 — S. marginicollis; 63 — S. fimbriatus; 64 — S. lissoderus; bc — bursa copulatrix; rp — spermathecal receptacle; sg — spermathecal gland. Scale bars: 1 mm. Рис. 56–64. Stenaptinus spp., урит IX самки вентрально: 56 — S. sumatrensis sp.n.; 57 — S. consularis flaviceps ssp.n. from Gia Lai Prov.; 58 — S. stenoderus; 59 — S. javanus; 60 — S. c. consularis; 61 — S. agnatus; 62 — S. marginicollis; 63 — S. fimbriatus; 64 — S. lissoderus; bc — копулЯтивнаЯ сумка; rp — семеприемник сперматеки; sg — желеЗа сперматеки. МасШтаб: 1 мм.

Figs 90–105. Stenaptinus spp., variation of dorsal pattern in specimens from different localities: 90–94 — S. consularis; 95 — S. marginicollis; 96–97, 103–105 — S. stenoderus; 98–102 — S. lissoderus; 90–91, 101–102, 104 — Northern Thailand; 92 — Gia Lai Prov.; 93, 96 — Pu Hoat NP; 94 — Ke Go NP; 97 — Tam Dao; 98–100, 103 — India; 105 — Song Thanh NP. Рис. 90–105. Stenaptinus spp., иЗменчивость окраски верха у особей иЗ раЗных местонахождений: 90–94 — S. consularis; 95 — S. marginicollis; 96–97, 103–105 — S. stenoderus; 98–102 — S. lissoderus; 90–91, 101–102, 104 — северный Таиланд; 92 — Пров. ЗЯлай; 93, 96 — нац. парк Пухоат; 94 — нац. парк Кего; 97 — Тамдао; 98–100, 103 — ИрдиЯ; 105 — нац. парк Сонгтхань.