Chydaeus baoshanensis Kataev & Liang, 2012

Kataev, Boris M., Liang, Hongbin & Kavanaugh, David H., 2012, Contribution to knowledge of the genus Chydaeus in Xizang Autonomous Region [Tibet] and Yunnan Province, China (Coleoptera, Carabidae, Harpalini), ZooKeys 171, pp. 39-92 : 55-57

Chydaeus baoshanensis Kataev & Liang sp. n. Figs 38-43 55 57

Type material.

Holotype, a male, in ZIN, labeled: " China, Yunnan, N Baoshan, 25°30'10"N, 99°06'40"E - 25°29'26"N, 99°06'16"E, 2265-2530 m, 08.V.2006, I. Belousov & I. Kabak leg.".

Description

(male). Dorsal habitus as in Fig. 55 . Size: Body length 9.5 mm, width 4.1 mm.

Morphological characters as described for Chydaeus asetosus except as follows:

Color: Body black, shiny on dorsum; labrum, tibiae and tarsi paler, blackish brown; antennae dark brown, palpi lighter brown.

Microsculpture: Head with dorsal microsculpture effaced. Pronotum with microsculpture more or less effaced.

Head: Large (HWmax/PWmax = 0.71 and HWmin/PWmax = 0.62), covered with very fine micro-punctures on labrum and on areas around frontal foveae, above supraorbital furrows, and around and behind supraorbital setae. Frontal suture thin, slightly impressed. Frontal foveae very shallow, clypeo-ocular prolongations extended to supraorbital furrows. Ligular sclerite with apical angles slightly projected laterally.

Pronotum ( Fig. 38 ): Slightly transverse (PWmax/PL = 1.47), slightly narrowed basad (PWmax/PWmin =1.23), with one lateral seta on each side before middle. Basal margin nearly straight medially and slightly oblique laterally, slightly wider than apical margin. Lateral depressions very narrow and barely evident along entire length. Basal foveae absent and area near basal angles slightly convex, almost flat. Pronotal surface punctate almost throughout, but punctures extremely fine medially.

Elytra: Elytra relatively short (EL/EW= 1.40, EL/PL = 2.45, EW/PWmax = 1.19), widest just behind middle, without humeral denticles. Subapical sinuations slightly shallower than in Chydaeus asetosus . Parascutellar striae short, about 2.0-3.5 times as long as diameter of parascutellar setigerous pore, not connected distally with first (sutural) striae. Intervals nearly flat, lateral intervals very finely and indistinctly micro-punctate. Umbilicate setal series without distinct gap at middle.

Venter: Metepisterna ( Fig. 39 ) markedly narrowed posteriad, slightly wider than long.

Legs: Metatarsi slightly shorter than minimum linear distance across neck constriction just behind eyes

Aedeagus ( Figs 40-43 ): Median lobe similar to that of Chydaeus asetosus , but terminal lamella ( Fig. 40 ) narrower, slightly curved dorsad at apex and without apical capitulum; basal triangular depression on its dorsal side prolonged apicad up to middle of terminal lamella. Internal sac with two basal and one medial spiny patches; medial spiny patch located on left side of median lobe.

Distribution.

Fig. 57 . This new species is known only from the type locality, N Baoshan (Baoshan City) in the southern part of the Nu Shan (Mountains) in western Yunnan Province, China.

Specific epithet.

The specific epithet refers to Baoshan city in Yunnan Province, where the type specimen was collected.

Remarks.

Chydaeus baoshanensis belongs to the semenowi group and the holotype specimen is morphologically very similar to specimens of Chydaeus asetosus , differing from them mainly in the presence of one lateral seta on each pronotal side, the wider pronotal base and form of the male genitalia. The terminal lamella of the aedeagus of Chydaeus baoshanensis males is narrower than that of Chydaeus asetosus males, slightly curved dorsad and without an apical capitulum. As with Chydaeus asetosus , Chydaeus baoshanensis members are very similar externally to those of Chydaeus satoi and Chydaeus hanmiensis , including in having short metepisterna; but males of all four species are very distinct in genitalic form. In addition, Chydaeus baoshanensis differs from Chydaeus hanmiensis in having deeper elytral striae, rounded, not sinuate, pronotal sides, and the prosternal medial process not projected posteriad. Members of Chydaeus baoshanensis differ most distinctly from those of Chydaeus obtusicollis in having much shorter metepisterna.

Figures

Figures 38 - 43. Chydaeus baoshanensis sp. n. (holotype) 38 Pronotum. 39 Left metepisternum 40 Terminal lamella of median lobe, dorsal view 41 Median lobe, left lateral view 42 Median lobe, dorsal view 43 Median lobe, right lateral view. Scale lines: A = 1.0 mm (Fig. 38), B = 0.5 mm (Fig. 40), C = 1.0 mm (Figs 39, 41 - 43).

Figures 51 - 55. Dorsal habitus, Chydaeus species. 51 Chydaeus fugongensis sp. n. (holotype). 52 Chydaeus gutangensis sp. n. (holotype). 53 Chydaeus hanmiensis sp. n. (holotype). 54 Chydaeus asetosus sp. n. (holotype) 55 Chydaeus baoshanensis sp. n. (holotype). Scale lines = 1.0 mm.

Figures 56 - 57. Toporelief map of southeastern Asia, illustrating localities for Chydaeus species 56 Chydaeus shunichii Ito = red dots, Chydaeus fugongensis sp. n. = pink diamond, Chydaeus gutangensis sp. n. = yellow square, and Chydaeus hanmiensis sp. n. = light blue triangle 57 Chydaeus baoshanensis sp. n. = dark blue square, Chydaeus asetosus sp. n. = yellow triangles, and Chydaeus obtusicollis Schauberger = red dots. Only new records reported here are shown. Scale bar = 300 km (in 100 km increments).