Colasposoma (Falsonerissus) distinguendum, Zoia, 2012

Zoia, Stefano, 2012, Eumolpinae (Coleoptera: Chrysomelidae) of Socotra Island, Insect biodiversity of the Socotra Archipelago (Acta Entomologica Musei Nationalis Pragae 52), pp. 449-501 : 457-458

Colasposoma (Falsonerissus) distinguendum sp. nov.

(Figs. 19–23, 111–112, 140)

Type locality. Yemen, Socotra Island, Noged plain Qaareh (waterfall), 12°21.9′N, 54°05.3′E.

Type material. HOLOTYPE: J, ‘ Yemen, Soqotra Is., 2003 5-6/xii, Noged plain Qaareh (waterfall), 57m, N12°20′10″ E53°37′56″ [GPS], David Král lgt. [printed white label]; Yemen – Soqotra 2003 Expedition; Jan Farkač, Petr Kabátek & David Král [printed white label] ; Holotypus Colasposoma (Falsonerissus) distinguendum n. sp. S. Zoia det. 2012 [printed red label]’ ( NMPC). PARATYPES (4 spec.): ‘ Yemen, Soqotra Is., 2003 5-6/xii, Noged plain Qaareh (waterfall), 57m, N12°20′10″ E53°37′56″ [GPS], David Král lgt’ (1 J, SZCM) ; ‘ Yemen, Soqotra Is., 5.-6.xii.2003, Noged plain: Qaareh (waterfall) N12°20′10″ E53°37′56″, 57 m [GPS], Jan Farkač lgt.’ (1J, NMPC) ; ‘ Yemen, Socotra Isl. , Noged, Mokhar, 31.iii.2001, leg. V.Bejček & K.Šťastný’ (1 J, JBCB) ; ‘ Yemen, Socotra Isl. , Lahas, GPS 12.646N, 54.091E, 69 m, 17.-18.xi.2000, leg. V. Bejček & K. Šťastný’ (1 J, SZCM) .

Description. Habitus as in Figs. 111–112 ; body length of holotype 5.6 mm, of paratypes 5.3–5.7 mm.

Body dark brown; head, pronotum and elytra brown, head and pronotum darker with feeble metallic reflections; labrum, palpi and antennae reddish; mandibles dark brown to black; legs dark brown, with dorsal part of meso– and metafemora paler.

Frons weakly convex, with confused and close punctures and relatively long silvery pubescence, punctation is deeper and confluent near clypeus; clypeus convex and with finer punctation. Antennomere I one fourth longer than II and more than twice as wide; antennomere II 2.5 times longer than wide, feebly bent; antennomere III one third longer than II; antennomeres IV and V a little shorter than antennomere III and longer than VI; antennomeres VII–X feebly widened, VII a little longer than the following ones; antennomere XI nearly three times longer than wide.

Pronotum 1.7 times wider than long (2.6 × 1.5 mm in holotype), at base nearly as wide as at distal border; sides regularly arched and margined throughout, widest in basal third; surface closely punctate, a paratype with a longitudinal impunctate short stripe on pronotal disc; surface between punctures smooth and bright, narrower than diameter of punctures; pubescence long, fine, silvery, suberected on disc, erected at sides.

Scutellum a little wider than long, rounded distally (Fig. 23), pubescent.

Hypomeron punctured throughout, with moderately long pubescence; prosternum with long pubescence; mesepimera bare, not punctured; metanepisterna three times longer than wide, pubescent.

Elytra oblong, 1.3 times longer than wide at humeri (3.7 × 2.9 mm in holotype), feebly impressed dorsally at basal fifth; sides subparallel in basal half, then regularly curved to apices, which form right angle; humeri poorly prominent; punctation finer than on pronotum, irregular, finer on apical slope; pubescence long, as long as on pronotal sides, fine, erect. Epipleura gradually tapering toward rear, reaching elytral apices.

Legs moderately long; femora unarmed, moderately swollen; pro– and mesotibiae feebly bent, metatibiae nearly straight; pro– and mesotarsomere I feebly widened in J. Claws bifid starting from their midlength, with short internal tooth.

Abdomen dorsally poorly sclerotized, with exception of last visible segment.

Aedeagus as in Figs. 19–20.

Female unknown.

Differential diagnosis. Colasposoma (Falsonerissus) distinguendum sp. nov. is related to C. (F.) grande and C. (F.) villosum sp. nov., and is mainly characterized by a different shape of the median lobe of aedeagus; length of pubescence of the dorsum is nearly intermediate between those of the mentioned species.

Etymology. The name distinguendum (to be distinguished) refers to its likeness to other species of the subgenus Falsonerissus .

Figures

Figs. 105–116. Habitus, dorsal and lateral view of: 105–106 – Colasposoma (Falsonerissus) socotranum (Gahan, 1903) (♀, wadi Ayhaft); 107–108 – C. (F.) grande grande (Lefèvre, 1890) (J lectotype); 109–110 – C. (F.) grande insulare subsp.nov.(J holotype); 111–112 – C. (F.) distinguendum sp. nov. (J holotype); 113–114 – C. (F.) villosum sp. nov. (J holotype); 115–116 – C. (Colasposoma) austerum sp. nov. (J holotype).