Stenaptinus fimbriatus ( Chaudoir, 1876 )

Fedorenko, D. N., 2021, Stenaptinus (Coleoptera: Carabidae: Brachininae) of Vietnam. Note 2, Russian Entomological Journal 30 (1), pp. 25-42 : 37-38

6. Stenaptinus fimbriatus ( Chaudoir, 1876) , stat.rest.

Figs 7 , 17 , 48–50, 53 , 63 , 66 , 77–81 .

Chaudoir, 1876: 43 ( Pheropsophus javanus var.; ‘côte de Malabar, Siam, Java’). — javanus (part.): Andrewes, 1930: 273; Csiki, 1933: 1601; Jedlička, 1964: 534; Habu, 1967: 291; 1984: 123; Hrdlička, 2017: 480; Venugopal et Thomas, 2019: 73.

MATERIAL. Lectotype ♀ (designated here) ( MNHN; digital images) with a yellow hanwritten label ‘javanus . m/ h[abite]. in inf[erior]. Java’, two labels ‘Ex Musaeo/ Chaudoir’ and ‘G. J. Arrow/ vidit 1901’, and a hanwritten label ‘javanus Dejean / Java / C. Dejean’ at bottom of the box with the lectotype.

Additional material: 3♂♂, 5♀♀ ( SIEE), Vietnam, Dongnai Province, Nam Cat Tien National Park , 11°25´18´´N / 107°25´44´´E, at light HQL-450, 3–12.VI.2005 (D. Fedorenko) ; ♂, same data except 18–25.X.2004 ; ♂, ♀, ( MSPU), Quang Binh Province, Minh Hoa [= Quy Dat] Distr., env. Yen Hop, Ke Bang National Park , 13.IV.1999 or 24–30.III.1999 (S. Kruskop) ; ♀ ( SIEE), Cambodia, Stung-Treng , 3.XII.2017 (A. Kompantsev) ; ♀, Kep Province, env. Kep, 10°29´56´´N / 104°17´39´´E, h~ 40 m, at light, 13.VI.2014 (I. Melnik) ; ♂ ( SIEE), Sumatra, Berastagi, lake Toba , 10.VI.214 (A. Vasiliev); W Sumatra Province, ~ 6 km NNW of Bukittinggi, 0°14´47´´N / 100°20´49´´E, h= 900 m, 22.II.2017 (A. Prosvirov) .

Genitalia examined in seven males and three females.

DIAGNOSIS. Very similar to S. javanus in body shape, proportions (Table) and colour pattern ( Figs 77–81 ), except for the following characters: Elytra rather short in females. Black patch on vertex parallel-sided or broadened toward pronotum; pronotal pale spots large, leaving pronotum very narrowly to indistinctly infuscated along sides. Tergite VII with 10–13 apical setae which are very strong and apically hooked in female. Aedeagus ( Figs 48–50, 53 ): apex of median lobe with a distinct ventro-apical carina, in dorsal view long, triangular, with tip in form of a minute pointed beak; internal sac symmetrical, with a large duble basal bulb and body reduced much in size.

REDESCRIPTION. BL 16.5–20 mm. Body pattern variable ( Figs 77–81 ): vertex with black spot varying between large U-shaped, mostly extended to pronotum or occupying entire neck, and rather small pentagonal, with neck more or less infuscated medially; elytral pale transverse band, narrow to wide, strongly dentate and mostly reaching lateral margin.

Head and pronotum pilose and punctate as in S. agnatus , except that setigerous punctures are much less distinct on the latter; elytral pilosity very sparse yet traceable, being often arranged into an irregular row in each interval.

Pronotum subcordate, as long as wide, broadest almost medially. Base distinctly wider than apex; basal angles mostly slightly obtuse and blunt. Lateral bead and groove fine, obliterate in front of basal angles, sometimes (specimen from Java) entire.

Abdomen ( Figs 7 , 17 ): Tergite VII with dense and rather fine double punctation, larger punctures being small. Sternite VIII with lateral apical setae strong and curved dorsad in female.

Female gonocoxite IX long, subclavate, slightly curved, apically obtuse ( Fig. 63 ). Spermatheca distinctive due to receptacle apically incrassate, bulbous ( Fig. 66 ).

GEOGRAPHIC DISTRIBUTION. Southern India to Indochina (supposedly, except northern parts) south to the Greater Sunda Isles. The species range is similar to that of S. javanus , yet obscured by confusion of S. fimbriatus , S. agnatus S. javanus and S. sumatrensis sp.n. The species is not uncommon in southern Vietnam, yet no record in Central or northern Vietnam.

HABITATS AND HABITS. No data, except that most specimens examined were collected at light in lowlands, in southern Vietnam, together with specimens of other congeners (see the respective section under S. agnatus ).

COMMENTS. The species was described based on three syntypes from either southeastern India or Thailand, or Java ; that from India is here designated as the lectotype .

Unlike the other species of the group, S. fimbriatus is sexually dimorhic in body proportions. In particular, the elytra are slightly longer and narrower in males than in females: EL/EW 1.52–1.65 (1.58) vs. 1.46–1.58 (1.50) and EW/PW 1.65–1.86 (1.78) vs. 1.78–1.97 (1.90), respecively (4♂♂ and 4♀♀ from the Cat Tien NP, 2♂♂ from Sumatra, and 2♀♀ from Cambodia measured).

Besides, I provisionally determine three male specimens [ Natural History Museum, 2014] from the Malay Peninsula as S. fimbriatus , with reservation that at least some of them may belong to S. sumatrensis sp.n. These are from: (1) ‘Perak’, without exact locality ( NHMUK 013460710); (2) Parit Buntar, Perak, 4.XI.1931, H.T. Pagden ( NHMUK 013460706); (3) Langkawi Is, Kedah (West Coast), 14.IV.1928 ( NHMUK 013460711).

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 43–55. Stenaptinus spp., median lobe of aedeagus with everted and inflated internal sac: 43–47 — S. agnatus from Cat Tien (43–45) and Kon Ka Kinh (46–47); 48–50, 53 — S. fimbriatus from Cat Tien (48) and Sumatra (49–50, 53); 51, 55 — S. dongnaiensis sp.n.; 52, 54 — S. sumatrensis sp.n.; 43–44, 47–48, 53–55 — dorso-apical aspect; 45–46, 49–52 — left aspect; dbl — left distal basal bulb. Scale bar: 1 mm. Рис. 43–55. Stenaptinus spp., среднЯЯ долЯ Эдеагуса с вывернутым и надутым внутренним меШком: 43–47 — S. agnatus иЗ Катьена (43–45) и КонкакинЯ (46–47); 48–50, 53 — S. fimbriatus иЗ Катьена (48) и с Суматры (49–50, 53); 51, 55 — S. dongnaiensis sp.n.; 52, 54 — S. sumatrensis sp.n.; 43–44, 47–48, 53–55 — dorso-apical aspect; 45–46, 49–52 — left aspect; dbl — левый дистальный баЗальный 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 65–70. Stenaptinus spp., female reproductive tract: 65 — S. stenoderus; 66 — S. fimbriatus; 67 — S. javanus; 68 — S. marginicollis; 69 — S. agnatus; 70 — sumatrensis sp.n.; bc — bursa copulatrix; ov — common oviduct; rp — spermathecal receptacle; sc — seminal canal; sg — spermathecal gland. Scale bar: 1 mm. Рис. 65–70. Stenaptinus spp., репродуктивный тракт самки: 65 — S. stenoderus; 66 — S. fimbriatus; 67 — S. javanus; 68 — S. marginicollis; 69 — S. agnatus; 70 — sumatrensis sp.n.; bc — копулЯтивнаЯ сумка; ov — непарный Яйцевод; rp — семеприемник сперматеки; sa — апикальные Щетинки; sс — семенной канал; sg — желеЗа сперматеки. МасШтаб: 1 мм.

Figs 74–89. Stenaptinus spp., variation of dorsal pattern in specimens from different localities: 74–76 — S. javanus; 77–81 — S. fimbriatus; 82–89 — S. agnatus; 74 — Loc Bao; 75–76 — Thailand; 77 — Sumatra; 78–79, 88 — Cambodia; 80–81, 85–87 — Cat Tien NP; 82–83 — Song Thanh NP; 84 — Kon Plong Distr.; 89 — Nho Quan env. Рис. 74–89. Stenaptinus spp., иЗменчивость окраски верха у особей иЗ раЗных местонахождений: 74–76 — S. javanus; 77–81 — S. fimbriatus; 82–89 — S. agnatus; 74 — Локбао; 75–76 — Таиланд; 77 — Суматра; 78–79, 88 — Камбоджа; 80–81, 85–87 — нац. парк Каттьен; 82–83 — нац. парк Сонгтхань; 84 — округ Конплонг; 89 — окр. Нхокуан.