Findoclivina, Balkenohl, 2023

Balkenohl, Michael, 2023, Notes on Clivinini species from Asia with the description of a new genus and a new species from Myanmar and the North of India (Coleoptera, Carabidae, Scaritinae), Linzer biologische Beiträge 55 (2), pp. 405-415 : 406-408

Findoclivina nov.gen. ( Figs 1-4 )

T y p e s p e c i e s: Clivina spatulifera ANDREWES, 1929

E t y m o l o g y: The name refers to the base of the pronotum which appears cleft in dorso-frontal view and is derived from the Latin "findere, findo" (= to cleave) and Clivina , the lead genus of the tribe.

D i a g n o s i s: Smaller sized Clivinini species, with sub-cylindriform outline of the pronotum and elytra. Labrum seven-setose, clypeus and clypeal wings separated by distinct notches, eyes prominent, mentum with its emargination small. Pronotum with lateral margin running up to the base without posterior angle, median line conspicuously deepened towards base and disrupts the pronotal convexity into two parts, anterior lateral setigerous puncture situated distinctly backwards, proepisternum swollen and distinctly visible in dorsal view. Elytron with striae one to four ending free at base, intervals convex, interval eight carinate at the humerus and apex, sub-costate at middle, interval three with four dorsal setigerous punctures. Abdomen with the two anal setigerous punctures widely separated. Hind wings fully developed. Protibia with digitation extraordinary spatula-like widened including spurs, mesotibia with two rows of robust short setae arising from short tubercles, with one short spur with preapical seta towards apex. Female genitalia with gonocoxites exhibit a morphology not jet observed in any other Clivinini group (see species description).

There is no other Clivinini species known to me who shares the remarkable characters of the pronotum, front tibia and female gonocoxites.

Description:

Colour: Flavous, shiny; mandibles, clypeus, and front legs darker.

Head: Slightly narrower than pronotum. Clypeus slightly emarginated, clypeal wings rounded, separated from median part of clypeus by distinct notches and from supraantennal plates by obtuse notches. Clypeus and supraantennal plates blunt reflexed margined. Clypeo-frontal furrow not sharp but distinct, clypeal-field transverse, raised, laterally delimited by prominent fovea at each side which contains the clypeal seta. Frons moderately convex, with two flat elongate impressions, supraorbital carina of medium size, supraorbital sulcus (facial furrow) conspicuously deep and wide, with the two supraorbital setae arising from tubercles, eye moderately prominent, gena indistinct. Antenna with segments five to ten elongate (length/width 1.46), densely pubescent from antennomere three onwards. Labrum moderately bilobed anteriorly, seven setose. Mandible somewhat elongated, slightly hooked at apex. Mentum isodiametrically reticulated, with lobes moderately and regularly convex, tooth at middle acute, with carina, as high as lobes, emargination between lobes and tooth small.

Pronotum ( Figs 2, 3 ): Outline rectangular, slightly longer than wide, distinctly convex in frontal view, in lateral view moderately convex in anterior three quarters, posterior quarter steeply falling to basal constriction. Anterior angle rounded, with distinct notch, anterior lateral setigerous puncture situated distinctly backwards. Lateral margin smooth, running up to the base without posterior angle, position of posterior angle marked by posterior setigerous puncture and slight angle of the margin (visible in lateral view). Lateral margin somewhat contracted before middle. Anterior transverse line not joining margin. Median line surpassing anterior transverse line, conspicuously deepened towards base and disrupts the pronotal convexity into two parts in posterior third. Surface smooth, posterior quarter isodiametrically reticulated. Basal constriction wide, lateral margin not joining carina of flange. Proepisternum swollen, distinctly visible in dorsal view.

Elytron: Flattened in lateral view, subcylindrical in frontal view. Oblongo-elongate, nearly two times as long as wide, nearly straight laterally, maximum width behind middle. Humerus square, without tooth. Lateral margin posterior humerus slightly crenulate. Intervals distinctly convex, more convex at base, interval three with tubercle at base, interval three with four setigerous punctures, interval eight carinate at humerus and apex, subcostate at middle. Striae one to four ending free at base, stria one at base with distinct setigerous tubercle, striae opaque, with irregular reticulation and very fine numerous punctures, striole distinct.

Hind wings: Fully developed.

Lower surface: Proepisternum and episternum with isodiametric reticulation, without wrinkles. Abdominal sternites smooth at middle, laterally with distinct isodiametric reticulation, last abdominal sternite completely covered with isodiametric reticulation, with slight marginal sulcus at middle and flattened area (in both of the sexes), with the two marginal setigerous punctures widely separated, with setae elongated.

Legs: Protibia robust ( Fig. 4 ), surface reticulated, with indistinct carina, with digitation extraordinary spatula-like widened including spurs, first tarsomere elongated and widened, tarsomeres two to four small, as long as wide, tarsomere five short, one and a half longer than wide. Protrochanter elongated, angled apically. Mesotibia with two rows of five robust short setae arising from short tubercles, with one short spur preapically furnished with seta, with three fine setae at the inner side.

External sexual dimorphism: Not observed.

D i s t r i b u t i o n: Myanmar.

Figures

Figs 1-4: Findoclivina spatulifera (ANDREWES), lectotype; (1) habitus, dorsal view; (2) head, pronotum, dorso-lateral view; (3) pronotum, dorsal view; (4) right front tibia, dorsal view.