Stenaptinus montanus Fedorenko, 2020

Fedorenko, D. N., 2020, Stenaptinus (Coleoptera: Carabidae: Brachininae) of Vietnam. Note 1, Russian Entomological Journal 29 (4), pp. 361-376 : 368

Stenaptinus montanus Fedorenko , sp.n.

Figs 6 , 21 , 39, 46–47 , 62, 66 , 75 . MATERIAL. Holotype ♀ ( ZMMU) and two paratypes, ♂ ♀, labelled:‘ Vietnam, Gia Lai Province,~ 40 km ENE of Pleiku, 14º13´21´´N / 108º19´55´´E, Kon Ka Kinh Nat [io]n[al]. Park , h= 1490 m, 21– 30.V.2017, D. Fedorenko leg.’.

Aedeagus compared with those of the male holotype of S. similis , seven males of S. bidoupensis and two males of S. ngoclinhensis .

DIAGNOSIS. As specified in the key. For comparison see also Tab. 1.

DESCRIPTION.BL 13–14 mm. Body ( Fig. 75 ) moderately shiny; pronotum dark brown to almost black, elytra dark brown to medially brown, pro-, meso-, metapleura, and abdomen rather dark brown; entire head, prosternum, meso- and metaventrites, mouthparts, antennae basally and legs reddish yellow, antennae toward apices brownish, apical halves of mandibles infuscated, antennomere 3 in basal half less so; apices of elytral ridges reddish. Vertex with a subquadrate, slightly transverse, cloudy, brown to dark brown spot not well separated from reddish brown or (♂) merged into dark brown neck.

Microsculpture isodiametric superficial on head and pronotum, longitudinal over elytra,superficial along ridges and coarse in between. Elytra densely longitudinally carinulate between ridges, carinulate sculpture transformed into nearly aciculate one at base.

Dorsum subglabrous, with a group of setigerous punctures just behind supraocular seta. Pronotum with very few short setae basally. Elytra distinctly pilose along sides and in interval 1 in basal third, sparsely setulose close to apices, with very few short setae here and there. Venter densely pilose, prosternum less so, propleura and notopleura impunctate and glabrous.

Head smooth, coarsely rugose across neck, more so laterally, with large and moderately convex eyes; genae nearly indistinct, smoothly extended into neck.Clypeus more or less sinuate apically. Labrum truncate, with widely rounded angles.

Pronotum cordate, as wide as long, barely wider than head, broadest almost a third from apex. Base barely wider than apex, basal and apical margins barely concave.Sides evenly S-shaped, rounded in apical half, sinuate in front of and diverging toward acute and blunt basal angles. Reflexed lateral margin narrow, distinct throughout its length. Transverse impressions vague, basal straight, apical V-shaped, median line fine between them, otherwise obliterate.

Elytra fairly short. Ridges narrowly costate, entire basally, ridges 6–8 carinate or almost so, ridges 7 and 8 sharply carinate toward base, ridge 8 shortened apically. Long setae: a few in interval 2, one in interval 3 just preapically and in interval 5 in basal third, occasionally interval 4 with 1–2 setae at middle.

Abdomen ( Figs 6 , 21 ): Tergite VII finely and densely punctate and setulose, dull due to coarse isodiametric microsculpture, with 16–21 long and straight apical setae in female; tergite VIII very sparsely and finely punctate, with isodiametric microsculpture obliterate in basal half and rather superficial in apical half. Sternites IV—VI at apex with one pair of obligatory median setae; sternite VII with two pairs of long obligatory setae and several shorter setae in between.

Legs: as for the subgenus. Profemora tumid laterally in male.

Aedeagus ( Figs 62, 66 ): apex of median lobe almost symmetrical, pointed, very gently concave at left margin and convex at right margin, and thence very slightly curved; internal sac similar to that of S. bidoupensis .

Female gonocoxite IX short, straight, clavate, similar to that of S. ngoclinhensis in shape ( Figs 39, 46–47 ).

GEOGRAPHIC DISTRIBUTION. Only known from the type locality.

NAME. Refers to the collecting circumstance of the specimens taken near the highest point of a mountain ridge.

HABITATS AND HABITS. All the three specimens have been collected in pitfall traps in a broad-leaved monsoon forest at about 1500 m elevation. Another sympatric species, S. obliteratus , has only been found to inhabit similar biotopes at 700–900 m altitudes in the locality.

Figures

Figs 1—15. Sternite VIII in female: 1 — Stenaptinus beckeri; 2 — S. tamdaoensis; 3 — S. tripustulatus; 4 — S. dissolutus from China; 5 — S. obliteratus; 6 — S. montanus sp.n.; 7 — S. dissolutus from Vietnam; 8 — S. guanxiensis; 9 — S. bidoupensis; 10 — S. dissolutus kalyakini; 11 — S. glabricollis sp.n.; 12 — S. ngoclinhensis; 13 — S. bipartitus; 14 — Pheropsophus ecuadorensis Hubenthal, 1911; 15 — S. lissoderus from Thailand; ic — internal carina; sa — apical setae. Scale bar: 1 mm. Рис. 1—15. Стернит VIII самки: 1 — Stenaptinus beckeri; 2 — S. tamdaoensis; 3 — S. tripustulatus; 4 — S. dissolutus иЗ КитаЯ; 5 — S. obliteratus; 6 — S. montanus sp.n.; 7 — S. dissolutus иЗ Вьетнама; 8 — S. guanxiensis; 9 — S. bidoupensis; 10 — S. dissolutus kalyakini; 11 — S. glabricollis sp.n.; 12 — S. ngoclinhensis; 13 — S. bipartitus; 14 — Pheropsophus ecuadorensis Hubenthal, 1911; 15 — S. lissoderus иЗ Таиланда; ic — внутренний киль; sa — апикальные Щетинки. МасШтаб: 1 мм.

Figs 16—30. Tergite VIII in female: 16 — Stenaptinus beckeri; 17 — S. tamdaoensis; 18 — S. ngoclinhensis; 19 — S. dissolutus from China; 20 — S. guanxiensis; 21 — S. montanus sp.n.; 22 — S. dissolutus kalyakini; 23 — S. obliteratus; 24 — S. bidoupensis; 25 — S. dissolutus from Vietnam; 26 — S. glabricollis sp.n.; 27 — S. tripustulatus; 28 — Pheropsophus ecuadorensis; 29 — S. bipartitus; 30 — S. lissoderus from Thailand; adr — apical depigmented region; as — anterior sclerotized region; psa — postero-apical sclerotized region; psa — posteromedian sclerotized region. Scale bar: 1 mm. Рис. 16—30. Тергит VIII самки: 16 — Stenaptinus beckeri; 17 — S. tamdaoensis; 18 — S. ngoclinhensis; 19 — S. dissolutus иЗ КитаЯ; 20 — S. guanxiensis; 21 — S. montanus sp.n.; 22 — S. dissolutus kalyakini; 23 — S. obliteratus; 24 — S. bidoupensis; 25 — S. dissolutus иЗ Вьетнама; 26 — S. glabricollis sp.n.; 27 — S. tripustulatus; 28 — Pheropsophus ecuadorensis; 29 — S. bipartitus; 30 — S. lissoderus иЗТаиланда; adr— апикальнаЯ депигментированнаЯобласть; as— переднЯЯ склеротиЗациЯ; psa— постеро-апикальнаЯсклеротиЗациЯ; psm — постеро-медиальнаЯ склеротиЗациЯ. МасШтаб: 1 мм.

Figs 31—45. Urite IX ventrally in female: 31 — Stenaptinus beckeri; 32 — S. lissoderus from Thailand; 33 — S. tripustulatus; 34 — S. dissolutus from China; 35 — S. tamdaoensis; 36 — S. bidoupensis; 37 — S. dissolutus kalyakini; 38 — S. guanxiensis; 39 — S. montanus sp.n.; 40 — S. dissolutus from Vietnam; 41 — S. obliteratus; 42 — S. ngoclinhensis; 43 — S. glabricollis sp.n.; 44 — Pheropsophus ecuadorensis; 45 — S. bipartitus; bc — bursa copulatrix; gcx — gonocoxite; lsc — lateral sclerite. Scale bar: 1 mm. Рис. 31—45. Урит IX самки, вентрально: 31 — Stenaptinus beckeri; 32 — S. lissoderus иЗ Таиланда; 33 — S. tripustulatus; 34 — S. dissolutus иЗ КитаЯ; 35 — S. tamdaoensis; 36 — S. bidoupensis; 37 — S. dissolutus kalyakini; 38 — S. guanxiensis; 39 — S. montanus sp.n.; 40 — S. dissolutus иЗ Вьетнама; 41 — S. obliteratus; 42 — S. ngoclinhensis; 43 — S. glabricollis sp.n.; 44 — Pheropsophus ecuadorensis; 45 — S. bipartitus; bc — копулЯтивнаЯ сумка; gcx — гонококсит; lsc — латеральный склерит. МасШтаб: 1 мм.

Figs 46—53. Apex of abdomen and reproductive tract of female: 46—47 — Stenaptinus montanus sp.n.; 48 — S. glabricollis sp.n.; 49 — S. guanxiensis; 50 — S. dissolutus from Vietnam; 51 — S. dissolutus from China; 52 — S. obliteratus; 53 — S. bipartitus; bc — bursa copulatrix; gcx — gonocoxite IX; rp — receptacle; sa — apical setae; sg — spermathecal gland. Scale bars: 1 mm. Рис. 46—53. ВерШина брюШка и репродуктивный тракт самки: 46—47 — Stenaptinus montanus sp.n.; 48 — S. glabricollis sp.n.; 49 — S. guanxiensis; 50 — S. dissolutus иЗ Вьетнама; 51 — S. dissolutus иЗ КитаЯ; 52 — S. obliteratus; 53 — S. bipartitus; bc — копулЯтивнаЯ сумка; gcx — гонококсит IX; rp — рецептакул; sa — апикальные Щетинки; sg — желеЗа сперматеки. МасШтаб: 1 мм.

Figs 54—69. Median lobe of aedeagus with everted and inflated internal sac: 54, 58 — Stenaptinus obliteratus; 55, 59 — S. dissolutus from Vietnam; 56, 60 — S. dissolutus from China; 57, 61 — S. glabricollis sp.n.; 62, 66 — S. montanus sp.n.; 63, 67 — S. bidoupensis; 64, 68 — S. guanxiensis; 65, 69 — S. tamdaoensis; 54—57, 62—65 — left aspect; 58—61, 66—69 — dorso-apical aspect; b — body of internal sac; bbd — distal basal bulb; bbp — proximal basal bulb. Scale bars: 1 mm. Рис. 51—66. СреднЯЯ долЯ Эдеагуса с вывернутым и надутым внутренним меШком: 54, 58 — Stenaptinus obliteratus; 55, 59 — S. dissolutus иЗ Вьетнама; 56, 60 — S. dissolutus иЗ КитаЯ; 57, 61 — S. glabricollis sp.n.; 62, 66 — S. montanus sp.n.; 63, 67 — S. bidoupensis; 64, 68 — S. guanxiensis; 65, 69 — S. tamdaoensis; 54—57, 62—65 — слева; 58—61, 66—69 — дорЗо-апикально; b — тело внутреннего меШка; bbd — дистальный баЗальный пуЗырь; bbp — проксимальный баЗальный пуЗырь. МасШтаб: 1 mm.

Figs 70—75. Dorsal habitus: 70 — Stenaptinus dissolutus from Vietnam; 71 — S. dissolutus from China; 72 — S. tamdaoensis; 73 — S. guanxiensis; 74 — S. obliteratus; 75 — S. montanus sp.n., male, paratype. Рис. 70—75. Габитус, дорЗально: 70 — Stenaptinus dissolutus иЗ Вьетнама; 71 — S. dissolutus иЗ КитаЯ; 72 — S. tamdaoensis; 73 — S. guanxiensis; 74 — S. obliteratus; 75 — S. montanus sp.n., паратип, самец.