Selenotichnus parvulus, Kataev & Wrase, 2006

Kataev, B. M. & D. W. Wrase, 2006, Two new species of Selenotichnus KATAEV 1999 from Yunnan, China (Coleoptera, Carabidae, Harpalini), Linzer biologische Beiträge 38 (2), pp. 1493-1498 : 1493-1498

Selenotichnus parvulus nov.sp. ( Figs 4-6 )

T y p e m a t e r i a l: Holotype 6: China, N Yunnan, Lijiang Naxi Aut. Co., 2 km NW Yongsheng, 54 km WSW Lijiang, 2120 m, 26°41.9'N 100°44.2'E, limestone hill, under stones / plants, 14.VIII.2003, D.W. Wrase leg. (cWR) . Paratypes 6 66, 12 ♀♀: same data as holotype (cWR, ZISP) ; 2 66k 2 ♀♀: same locality data as holotype but A. Smetana leg.

D e s c r i p t i o n: Body length 4.3-5.4 mm, width 1.8-2.3 mm.

Morphological character states as in S. olegi and S. klapkai nov.sp., but restricted and differing as follows.

Colour: Body black, shiny, usually with a green tinge on dorsum. Appendages brownish yellow, often femora more or less strongly infuscate.

Head: Medium sized (WHmax/WP = 0.65-0.69 in male and 0.66-0.70 in female; WHmin/WP = 0.50-0.57 in male and 0.52-0.55 in female), with moderately convex eyes. Clypeo-ocular prolongations short, not reaching eyes, superficial or somewhat deep, occasionally strongly reduced. Labrum weakly concave at apex. Microsculpture visible on clypeus, around supraorbital suture and behind eyes; meshes very fine, more or less isodiametric. Penultimate labial palpomere with three or four (more rarely five) setae on anterior margin and one ventroapical seta.

Pronotum: Moderately and rather evenly convex, 1.36-1.51 times as wide as long, widest in middle or just before it. Sides roundly or almost straightly converging in basal half. Base approximately as wide as or a little wider than apex. Basal angles obtuse, rather distinct or narrowly rounded at apices. Apical and basal beads complete, sometimes apical bead narrowly interrupted medially. Basal foveae small, oval and shallow. Lateral depressions absent. Area between basal fovea and lateral margin convex. Base finely and densely punctate, occasionally puncturation scarce and restricted to region of basal foveae. Microsculpture visible along margins, consisting of mixture of fine isodiametric and weakly transverse meshes, in male obliterate, in female more distinct and more widely distributed.

Elytra: Oblong oval, in male 1.30-1.47 times as long as wide, 2.42-2.65 times as long and 1.22-1.27 times as wide as pronotum; in female these indices respectively 1.34-1.46, 2.41-2.55, and 1.22-1.28. Humeral angles blunt at apices, each usually with a small denticle visible from behind. Sutural angle sharp in male, blunt or narrowly rounded at apex in female. Striae weakly impressed throughout. Each 3 rd interval with three to five (usually four) small discal pores at 2 nd stria (pores at apex sometimes located at 3 rd stria or in middle of interval). Microsculpture in male much finer than that in female, on disc rather strongly obliterate; meshes weakly transverse.

Hemisternite and stylus: Similar to that of S. olegi and S. klapkai nov.sp.

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Aedeagus: Median lobe ( Figs 4-5 ) comparatively slender, with relatively small basal bulb, weakly arcuate, with almost straight apical portion (lateral aspect). Terminal lamella short, wider than long, with sides roundly converging to narrowly rounded apex ( Fig. 6 ). Internal sac with a comparatively small medial tooth weakly widened basally and without any distinct spiny patches.

C o m p a r i s o n s: In general habitus, this new species is similar to S. olegi and S. klapkai nov.sp., but the body is, on average, smaller, relatively narrower and with relatively longer elytra. In addition, the elytral microsculpture in male is finer, slightly obliterate. S. parvulus nov.sp. clearly differs from both species in the male genitalia: median lobe of aedeagus is relatively smaller, more slender and somewhat less strongly curved, with relatively smaller basal bulb and almost straight apical portion (lateral aspect); its terminal lamella is shorter; internal sac is with a much smaller medial tooth weakly widened basally and without any distinct spiny patches.

D i s t r i b u t i o n: S. parvulus nov.sp. is known only from the type locality (2 km NW of Yongsheng) in the southern spurs of Mianmian Shan, northern Yunnan. This locality is situated somewhat outside the geographical ranges of both S. olegi and S. klapkai nov.sp., distributed in central and north-western parts of Yunnan Province.

E t y m o l o g y: The species epithet refers to the small body of the new species.

Figures

Figs 1-6: Selenotichnus, median lobe of aedeagus (3, 6 – terminal lamella). Figs 1-3: S. klapkai nov.sp.; Figs 4-6: S. parvulus nov.sp. (1, 3, 4, 6 – dorsal aspect; 2, 5 – lateral aspect). Scale bar = 0.5 mm.