Syleter sinepunctatus kluangensis, Balkenohl, 2021

Balkenohl, Michael, 2021, Revisiting the Oriental genus Syleter Andrewes, 1941 (Coleoptera: Carabidae: Clivinini), Revue suisse de Zoologie 128 (2), pp. 357-374 : 367-368

Syleter sinepunctatus kluangensis ssp. nov.

Figs 12 , 19 , 26

Holotype: BMNH; ♂, with labels and data: white, printed and handwritten in black ink “WEST MALAYSIA Jahore Kluang ” and backside “m. V. Trap”, “MARDI M9918 27-483 TAX. EXPDN.” and backside “Piper nigrum”, “Pres by Comm Inst Ent B.M. 1983-1”, yellow, black printed “C.I.E. COLL. A. 15326”, white, black printed and handwritten “ Syleter sp. det. R.B. Magde, 1983”, green, handwritten in pencil “ Syleter n.sp. Balkenohl 2000”.

Paratype: NHMG; 1 ♀, with labels and data: white, printed “ Selangor Sungei Buloh Kuala Lumpur 20-IX-72 T. Jaccoud ” .

Diagnosis: The subspecies differs from the nominotypical subspecies mainly by the elytron with its slightly more convex lateral margin, the indistinct reticulation on the lateral intervals, the wider frontal furrows of the head, and the pronotum with its smaller posterior angle. In addition, the apex of the aedeagus is acutely pointed at the tip and turns dorsally. In contrast to the nominotypical subspecies it is not found in Borneo.

Etymology: The name is a noun and refers to the type locality, Kluang in West Malaysia.

Description:

Measurements: Body length 3.45 / 3.59 mm, width 1.15 / 1.26 mm, ratio length/width of pronotum 1.0 / 0.99, ratio length/width of elytra 1.59 / 1.55.

The subspecies differs from the nominotypical subspecies in the following characters:

Head: Frontal furrow widened towards the middle at the front.

Pronotum: Posterior angle indistinct, obtuse.

Elytron: Lateral margin indistinctly subcrenulated, convex at middle, maximum width at middle; intervals with indistinct reticulation on intervals five to seven with increasing distinctness towards interval eight.

Male genitalia ( Fig. 19 ): Median lobe apically conspicuously acute in ventral view, in lateral view acuminated and asymmetric curved dorsally.

Female genitalia ( Fig. 26 ): Laterotergite with four long and one small nematiform setae.

Distribution: Known from West Malaysia (Kluang in Jahore, and Sungei Buloh near Kuala Lumpur).

Figures

Figs 7-13. Syleter spp., habitus. (7) S. paradoxus (Putzeys, 1868), specimen from Bangkok, female. (8) S. acutipalpis (Putzeys, 1877), lectotype. (9) S. fulvaster (Andrewes, 1927), paratype, male. (10) S. papua Darlington, 1962, paratype, female. (11) S. sinepunctatus sinepunctatus sp. nov., holotype. (12) S. sinepunctatus kluangensis ssp. nov., holotype. (13) S. gradus sp. nov. holotype.

Figs 14-20. Male genitalia, ventral view (above) and lateral view (below) of aedeagus with parameres in between. (14) Syleter paradoxus (Putzeys, 1868), specimen from Tale Noi, Thailand. (15) S. acutipalpis (Putzeys, 1877), lectotype. (16) S. fulvaster (Andrewes, 1927), paratype. (17) S. papua Darlington, 1962, paratype.(18) S. sinepunctatus sinepunctatus sp. nov., holotype. (19) S. sinepunctatus kluangensis ssp. nov., holotype. (20) S. gradus sp. nov. holotype.

Figs 21-27. Female coxostyli with laterotergite. (21) Syleter paradoxus (Putzeys, 1868), specimen from Tale Noi, Thailand, with latero- and mediotergite. (22) S. acutipalpis (Putzeys, 1877), specimen from Lilong, China. (23) S. fulvaster (Andrewes, 1927), holotype. (24) S. papua Darlington, 1962, paratype. (25) S. sinepunctatus sinepunctatus sp. nov., paratype. (26) S. sinepunctatus kluangensis sp. nov., paratype. (27) S. gradus sp. nov. paratype.