Tiferonia trapezicollis Fedorenko, 2022

Fedorenko, D. N., 2022, Notes on some Abacetina (Coleoptera: Carabidae: Pterostichini), with descriptions of a new genus and new species, Russian Entomological Journal 31 (1), pp. 15-26 : 22-24

Tiferonia trapezicollis Fedorenko , sp.n.

Figs 29–31 , 38 , 40–41, 48, 52–53.

MATERIAL. Holotype ♂ ( ZMMU), labelled: ‘S[outhern] Vietnam, N[orthern part of] Dongnai [Dong Nai] Pr. [ovince]/ Nam Cat Tien Nat [ional]. Park / Exped [ition]. Russ [ian].- Vietnamese / Tropical Centre / at light HQL450 5./ leg. D.Fedorenko. VI.2005 ’. Paratypes, 4♀♀ ( SIEE), with same labels, except for 28–29.XI.2004 or 3–4.XII.2004, or 21.V.2005, or 3.VI.2005.

DIAGNOSIS. A Tiferonia species with single, posterior, supra-ocular seta; pronotum obtrapezoidal, without basal sulci; elytral striae almost smooth. Within the genus, it is very similar to T. brunnea and T. sumatrensis sp.n. in body appearance, obliterate pronotal basal sulci, and single, posterior, supra-ocular seta only present (vs. two in the other congeners described). — Tiferonia brunnea has the pronotum narrower and less trapezoidal, PW/PL 1.34, PW/HW 1.74, PB/PA~1.6, broadest closer to middle, PLw/PL 0.44, elytral intervals more convex, and body paler in color, with pronotum red.

DESCRIPTION. BL 3.9–4.5 mm. Body ( Fig. 38 ) very shiny, head and elytra black, pronotum dark reddish brown, clypeus apically, labrum, mouthparts, legs, antennae, ventral side, elytral apices, suture in apical third, and lateral margin outside stria 8 behind humeri and in apical third red; pronotum along base and at apical angles more or less reddish, elytral sides behind humeri and reflexed lateral margin in middle third slightly to indistinctly reddish brown. Pronotum and especially elytra strongly iridescent, with bluish reflections prevailing. Dorsal microsculpture coarse isodiametric on head, including labrum, slightly more superficial on clypeus, becoming slightly transverse on a level with supra-ocular setae, obliterate behind; pronotal and elytral microsculpture very superficial, consisting of very dense transverse lines. Body glabrous, pilosity vestigial: scape with additional, somewhat verticellate, setae closer to apex, legs sparsely and microscopically setulose (the setules are hardly traceable on tibiae, otherwise indistinct or almost so).

Head small, eyes rather small and convex; frontal sulci moderately deep, impunctate, rather short S-shaped, slightly diverging behind clypeus and posteriorly, more diverging in between, reaching about the level of eye midlength, slightly extended onto clypeus. Labrum slightly convex at apical margin. Antennae just reaching pronotal base.

Pronotum obtrapezoidal, half wider than long, PW/PL 1.45–1.52 (1.48, n=5), almost twice as wide as head, PW/HW 1.85–1.94 (1.90), broadest a third from base, PLw/PL 0.27– 0.35 (0.31), sides nearly parallel in basal third and strongly converging before, apical angles slightly projecting, very slightly acute to very slightly obtuse porrect; disc very convex in apical half. Base much wider than apex, PB/PA 1.67– 1.74 (1.71), basal angles hardly more than right; basal sulci totally obliterate. Lateral bead fine and entire, with lateral groove smooth, basal bead missing, apical bead very fine, obliterate in middle third. Median line vague or almost so.

Elytra more than two fifths longer than wide, EL/EW 1.42– 1.47 (1.44), wide at bases, slightly wider than pronotum, EW/ PW 1.14–1.17 (1.16), nearly parallel-sided, with slight preapical sinuations and blunt apices. Humeri very distinct, sharp, minutely toothed; basal ridge nearly transverse, humeral angle slightly obtuse. Striae moderately deep, finely yet distinctly crenulate, obliterate at bases, deep close to apex; stria 7 more shallow in basal 1/3–1/4, with two apical setae, posterior seta being small and thence hard to detect. Intervals nearly flat, convex close to apex. USS with intermediate seta ( US 7) equidistant from anterior and posterior groups or slightly closer to the latter; US 9 and US 10 adjoining stria 8.

Figs 40–59. Aedeagus: 40–41, 48, 52–53 — Tiferonia trapezicollis sp.n., holotype; 42–43, 49, 54–55 — T. sumatrensis sp.n.; 44–45, 50, 56–57 — Holcoferonia crassimargo ; 46–47, 51, 58–59 — H. tenuimargo sp.n., holotype; 40–51 — median lobe; 52, 54, 56, 58 — right paramere; 53, 55, 57, 59 — left paramere; 40, 42, 44, 46, 52, 54, 56, 58 — left aspect; 41, 43, 45, 47, 53, 55, 57, 59 — right aspect; 48– 51 — ventral aspect. Scale bar: 1 mm.

Рис. 40–59. Эдеагус: 40–41, 48, 52–53 — Tiferonia trapezicollis sp.n., голотип; 42–43, 49, 54–55 — T. sumatrensis sp.n.; 44–45, 50, 56–57 — Holcoferonia crassimargo ; 46–47, 51, 58–59 — H. tenuimargo sp.n., голотип; 40–51 — среднЯЯ долЯ; 52, 54, 56, 58 — праваЯ парамера; 53, 55, 57, 59 — леваЯ парамера; 40, 42, 44, 46, 52, 54, 56, 58 — слева; 41, 43, 45, 47, 53, 55, 57, 59 — справа; 48– 51 — вентрально. Масштаб: 1 мм.

Ventral side smooth, metaventrite laterally, metepisterna, and base of abdominal sternite II finely to moderately punctate, abdomen more finely rugulose and punctate along sides. Urite VIII as in Figs 35–36 .

Legs strong.Metacoxal sulcus obliterate laterally.Metafemur bisetose. Mesotibia with 3–4 spiniform anterolateral setae, posterolateral seta on a level with distal anterolateral seta. Legs faintly sexually dimorphic: protarsomeres 1–3 very slightly dilated, with biserially squamose ventral pad, in male, not dilated and latero-apically toothed in female.

Aedeagus (Figs 40–41, 48, 52–53): median lobe arcuate, in dorsal/ventral view broadest a fourth from apex; apex lamellate, short, wide, widely rounded. Internal sac with two, postmedian and preapical, slight sclerotizations at left margin.

Female pregenital segment, genitalia and reproductive tract as in Figs 29–31 : Urite IX ventrally membranous and sparsely setulose; laterotergite apically rounded, with a row of setae along apical margin; gonosubcoxite with three, very short, closely set, spiniform apical setae; gonocoxite slender, shorter than gonosubcoxite, with double preapical nematiform seta and two small setae at middle, ventral and dorsal. Spermatheca convoluted, of about six turns.

NAME. Refers to the shape of pronotum.

GEOGRAPHIC DISTRIBUTION. Known from the type locality only.

HABITATS AND HABITS. All the specimens have been collected at light at night, at the edge of a lowland semideciduous monsoon forest, ca. 150 m distant from the Dong Nai River.

Figures

Figs 29–37. Urites VIII and IX in female: 29–31 — Tiferonia trapezicollis sp.n.; 32–34 — Holconotus lioderus; 35–37 — Holcoferonia crassimargo; 29 — urite IX and reproductive tract; 30, 33, 36 — sternite VIII; 31, 34, 37 — tergite VIII; 32, 35 — urite IX; bc — bursa copulatrix; ov — common oviduct; sp — spermatheca; vs — ventral sclerite. Scale bar: 1 mm. Рис. 29–37. Уриты VIII и IX самки: 29–31 — Tiferonia trapezicollis sp.n.; 32–34 — Holconotus lioderus; 35–37 — Holcoferonia crassimargo; 29 — урит IX и репродуктивный тракт; 30, 33, 36 — 36 — стернит VIII; 31, 34, 37 — тергит VIII; 32, 35 — урит IX; bc — копулЯтивнаЯ сумка; ov — непарный Яйцевод; sp — сперматека; vs — вентральный склерит. Масштаб: 1 мм.

Figs 38–39. Dorsal habitus: 38 — Tiferonia trapezicollis sp.n., paratype ♀; 39 — T. sumatrensis sp.n., holotype. Рис. 38–39. Габитус, дорЗально: 38 — Tiferonia trapezicollis sp.n., паратип ♀; 39 — T. sumatrensis sp.n., голотип.