Clivina trapezicollaris Balkenohl, 2025, sp. nov.
Creators: name: Balkenohl, Michael
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Carabidae
Clivina
Clivina trapezicollaris

description: Clivina trapezicollaris sp. nov.
(Figs 6, 41, 76)
Type material. Holotype: ♂, with labels and data: white, black printed “1 Jan 16 1 Wao, Lanao del Sur, Mindanao JANUARY 2004 ” / backside “resid. col. leg.” / yellow, handwritten in blue ink “ Coll. Balkenohl “ (CMBB).
Remark. The left front leg is missing in the holotype.
Description. Measurements. Body length 6.21 mm, width 1.74 mm, ratio L/W of pronotum 0.83, ratio L/W of elytra 1.93. Colour glossy, fuscous. Supraantennal plate slightly brightened. Antennae, mouthparts, intermediate and hind legs yellowish, trochanters yellow.
Head a quarter narrower than pronotum. Clypeus straight anteriorly, with its lateral teeth somewhat projecting; wing of moderate size, not more protruding anteriorly than clypeus, separated from clypeus by notch; supraantennal plate convex laterally; clypeus, wing, and supraantennal plate finely reflexed margined.Supraantennal plate extended nearly up to mid-eye level, separated from wing by distinct obtuse notch. Clypeus transverse, separated from frons by flat furrow, the two clypeal setae with wide pore. Frons moderately convex, with central pore at middle, clypeus and frons with scattered small punctures. Supraantennal plate separated from clypeus and frons by moderately wide reticulated furrow, continuing posteriorly up to mid-eye level as moderately wide supraorbital furrow. With blunt distinct supraorbital carina at posterior half of eye. Posterior keel of supraorbital plate and supraorbital carina separated by distinct narrow furrow. With two supraorbital setigerous punctures situated at mid-eye level and at end of gena-level. Neck constriction developed by distinct step and band of punctures. Eye distinctly hemispherical projecting laterally. Gena small, with convex ridge posteriorly. Antenna moderately long, just reaching posterior angles of pronotum, antennomeres four to ten sub-elongate (L/W around 1.33). Labrum straight, isodiametrically reticulated, seven-setose. Mandible of moderate size. Mentum with lateral lobe distinctly convex laterally, concave internally, tip flannel-like, surface with fine askew wrinkles, cleft small, prolonged posteriorly as blunt carina, median tooth higher than lateral lobes, rounded and hollowed out at apex.
Pronotum (Fig. 41) with disk slightly convex in lateral view, in frontal view slightly flattened at middle and moderately convex laterally. Trapezoidal, wider than long.Anterior margin slightly excised. Reflexed lateral margin smooth, nearly straight in anterior half, convex in posterior half, distinctly attenuating in anterior half, widest at posterior third; anterior angle rounded-off; posterior angle marked by rounded tooth. Lateral channel moderately narrow, reticulated, basal part of lateral margin from posterior angle to flange of base slanted with angle of around 20°, convex, flange short but distinct, basal channel moderately developed, basal carina sharp. Median line moderately narrow, joining anterior transverse line and base; anterior transverse line narrow, complete. Surface with scattered microscopic punctures, bilaterally with short, slight line-like impression, base isodiametrically reticulated.
Elytron (Fig. 6) with disk flattened in anterior half in lateral view, regularly convex in frontal view. Outline long oval, nearly two times longer than wide, maximum width slightly behind middle. Humerus rounded, formed by lateral margin which joins interval five. Reflexed lateral margin subcrenulated posterior humerus. Lateral channel moderately wide. Scutellar striole of moderate length, not deep; with longitudinal small tubercle at base, with distinct setigerous puncture at base of first stria, with distinct tubercle at base of third interval. Striae moderately deep, nearly impunctate, one to four free at base, five and six joining at humerus, seven shortened behind humerus, striae one and two running up to apex, three and four, and five and six joining apically. Intervals moderately convex, eight with relatively long narrow carina apically, seventh with step-like ridge at apex. Third interval with four setigerous punctures adjoining third stria. Surface of intervals smooth and glossy on disk, with distinct isodiametric reticulation at base, apical third, and on interval six to eight.
Hind wing fully developed.
Lower surface with proepisternum covered laterally with dense small punctures, punctures in median quarter less dense and larger, with some fine transverse wrinkles. Sternites of abdomen isodiametrically reticulated. Abdominal sternum VII with the two anal setigerous punctures widely separated, at middle slightly projecting posteriorly where it is indistinctly hollowed-out, with narrow indistinct marginal furrow at middle.
Legs. Protibia with three spines of moderate length and a small but distinct one basally, the apical one somewhat widened. Tibia finely sulcate dorsally, movable spur sharp, moderately curved, surface with longitudinal reticulation. Mesotibia with distinct and moderately long protuberance preapically with acuminate apex and with its seta inserted laterally, with ten setae furnished tubercles above protuberance, with few fine setae at the inner side. Front leg with tarsomeres slightly widened, first tarsomere elongated, laterally with two setae furnished tubercles.
Male genitalia (Fig. 76). Median lobe distinctly and regularly curved, apical lamella stretched out into asymmetric flattened slightly distorted spatula. Parameres moderately wide, acuminated and slightly distorted in apical third, apophyses small, apex asetose.
Female gonocoxites and epipleurite unknown.
Variation. The carina of interval eight at apex is interrupted at the left side. The left elytron is slightly longer than the right one.
Distribution. Known from the type locality Wao on the island of Mindanao, Philippines.
Diagnosis. A medium sized slender fuscous species with trapezoidal pronotum and intervals six to eight of the elytron reticulated. It differs mainly from the most similar species C. convexaquadrata sp. nov. by the more slender habitus, the trapezoid shape of the pronotum, and by the reticulation on intervals six to eight of the elytron. In addition, it is distinguished by its long and narrow carina in the apical third of interval eight.
Etymology. The name is derived from the trapeziform shape of the pronotum, and is expressed by the Greek adjective trapӗziŏn (= trapezoid) and the Latin substantive collum (pronotum) in the feminine genus.
description: Published as part of Balkenohl, Michael, 2025, On Asian Clivinini. Revision of the westwoodi-species group of the genus Clivina Latreille, 1802 (Coleoptera, Carabidae, Clivinini), pp. 1-70 in Zootaxa 5592 (1) on pages 15-16, DOI: 10.11646/zootaxa.5592.1.1, http://zenodo.org/record/14953674