Chydaeus fugongensis Kataev & Kavanaugh, 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 : 44-46

Chydaeus fugongensis Kataev & Kavanaugh sp. n. Figs 10-15 51 56 66

Type material.

Holotype, a male, deposited in IOZ, labeled: "China, Yunnan, Fugong Co., Lishadi town, Shibali, 6 km up, roadside, 27.17628°N, 98.74167°E, 2920 m, 2.V.2004, H.B. Liang & X.Y. Li leg".

Description

(male holotype only). Dorsal habitus as in Fig. 51 . Size: Body length 8.2 mm, width 3.8 mm.

Color: Body black, shiny on dorsum; mandibles basally, pronotum at basal angles and elytral epipleura slightly paler, reddish black. Antennae brown, with antennomeres 3 and 4 infuscated. Palpi light brown. Tarsi dark brown.

Microsculpture: Head with dorsal microsculpture comprised of fine isodiametric meshes, visible throughout, except effaced on frons and vertex. Pronotum with microsculpture visible throughout, comprised of fine isodiametric meshes basally and laterally and of slightly transverse, nearly effaced meshes on remaining surface. Elytra with microsculpture distinct throughout, comprised of fine, slightly transverse meshes.

Head: Comparatively large (HWmax/PWmax = 0.73 and HWmin/PWmax = 0.63), covered with micropunctures and very fine wrinkles; tempora slightly convex, almost flat, sloped to neck. Clypeus slightly concave and with slightly convex bead apically. Frontal suture distinct, slightly impressed. Frontal foveae small, oval, slightly deepened; clypeo-ocular prolongations absent. Supraorbital setae situated just behind hind margins of eyes. Eyes small and moderately convex. Antennae slightly extended beyond pronotal basal margin, with antennomeres 5 to 7 each about 1.6 times as long as wide. Labrum distinctly emarginate apically. Left mandible truncate at apex. Ligular sclerite nearly parallel-sided, straight at apex.

Pronotum ( Fig. 10 ): Markedly transverse (PWmax/PL = 1.64), narrowed basad (PWmax/PWmin = 1.26) and widest before middle. Sides rounded in anterior half and very faintly sinuate in basal half, with one lateral setigerous pore on each side before middle. Apical margin arcuately emarginate, bordered only laterally. Basal margin very broadly emarginate, almost straight, distinctly bordered throughout, slightly wider than apical margin and slightly narrower than elytral base between humeral angles. Apical angles slightly less than 90°, extended anteriad and narrowly rounded at apices. Basal angles slightly more than 90°, sharp at apices, each with a tiny denticle produced laterad. Pronotal disc moderately convex, slightly depressed basally, slightly sloped to sides and more abruptly sloped to apical angles. Lateral depressions present as narrow furrows behind apical angles, slightly widened behind lateral setigerous pore, and fused in basal quarter with large laterobasal depressions. Basal foveae elongate, moderately deep. Areas between basal foveae and between basal foveae and lateral depressions slightly convex. Pronotal surface coarsely and irregularly punctate along base and in lateral depressions, finer and sparser punctation present along apical margin and in central portion of disc.

Elytra: Oval, rounded at sides, moderately wide (EL/EW= 1.34, EL/PL = 2.83, EW/PWmax = 1.29), widest approximately at middle, not fused along suture. Humeri slightly prominent, widely rounded at apices, each with indistinct denticle visible only from behind; sides just behind humeral angles markedly rounded. Subapical sinuations shallow. Sutural angles not separated from each other, less than 90°, blunt at apices. Basal borders slightly sinuate, joined with lateral margin at very obtuse angle. Striae impunctate, faintly impressed along entire length. Parascutellar striae present, short, with basal setigerous pores present. Intervals slightly convex, almost flat, impunctate. Umbilicate setal series widely interrupted at middle, with anterior group comprised of six setigerous pores and posterior group comprised of seven setigerous pores on right side and of nine setigerous pores on left side.

Hindwings: Reduced to small scales.

Venter: Prosternum covered with scattered and very short setae. Prosternal medial process not projected posteriad. Proepisterna smooth, impunctate. Metepisterna ( Fig. 11 ) distinctly narrowed posteriad, slightly wider than long. Sternum VII (anal) in male with two pairs of setae along apical margin and slightly truncate at apex.

Legs: Metacoxae with additional posteromedial setigerous pore and with one or two additional medial setigerous pores. Metafemora with two setae along posterior margin. Protibiae with one ventroapical spine, the outer margin with one stouter spine and three slenderer spines apically. Tarsi glabrous dorsally, tarsomere 5 with three or four pairs of lateroventral setae. Metatarsi approximately equal to minimum linear distance across neck constriction just behind eyes; tarsomere 1 distinctly longer than tarsomere 2 and slightly shorter than tarsomeres 2+3. Protarsi (in male) moderately enlarged, with tarsomere 1 slightly longer than wide, tarsomeres 2 slightly wider than long, tarsomeres 3 and 4 distinctly wider than long and tarsomeres 1 to 4 with adhesive vestiture ventrally (only apically on tarsomere 1); mesotarsi comparatively slightly enlarged, with tarsomere 1 (not enlarged) distinctly longer than wide, tarsomere 2 slightly longer than wide, tarsomere 3 slightly wider than long, tarsomere 4 much smaller than tarsomeres 2 and 3 and deeply concave apically; mesotarsomeres 2 and 3 with adhesive vestiture ventrally.

Aedeagus ( Figs 12-15 ): Median lobe moderately widened medially (dorsal aspect), bent ventrad behind basal bulb and with terminal lamella slightly curved dorsad (lateral aspect) and with ventral margin nearly straight medially. Terminal lamella ( Fig. 12 ) flat, in dorsal aspect triangular, slightly longer than wide, narrowly rounded at apex and without any apical capitulum. Apical orifice in dorsal position, prolonged to basal bulb. Internal sac with several spiny patches.

Distribution.

Fig. 56 . This new species is known only from the type locality (Shibali, Lishadi town, Fugong County) in the northern part of Gaoligong Shan, northwestern Yunnan Province, China.

Habitat.

The holotype specimen was collected in a roadside open area hidden under a stone ( Fig. 66 ).

Specific epithet.

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

Remarks.

Like Chydaeus shunichii re-described above, Chydaeus fugongensis belongs to the kasaharai group because the holotype specimen has all the distinctive features of that group, namely: elytra with comparatively short parascutellar striae and with basal setigerous pores, the umbilicate setal series with wide gap medially, metepisterna slightly wider than long, and metacoxae with a posterolateral setigerous pore and additional medial setigerous pores. Within this group, the single known Chydaeus fugongensis male is most similar to those of Chydaeus shunichii , differing from them in the following characters: body, particularly the elytra, more elongate, pronotal sides slightly sinuate in basal half, pronotal microsculpture comprised of fine isodiametric meshes basally and laterally and of slightly transverse and nearly effaced meshes on the remaining surface, sternum VII (anal) slightly truncate at apex, median lobe of the aedeagus narrower, less markedly curved ventrad and with a longer terminal lamella, and the internal sac with characteristic armature. The Chydaeus fugongensis male is similar to those Chydaeus kasaharai in the shape of the median lobe, but differs from them in having impunctate elytra with much wider inner humeral angles (formed by the junction of the basal border and lateral elytral margin) and dorsally glabrous tarsi, and in the structure of the internal sac of the aedeagus. In addition, the basal bulb of the median lobe in Chydaeus fugongensis is relatively smaller than that in Chydaeus kasaharai males.

Figures

Figures 10 - 15. Chydaeus fugongensis sp. n. (holotype) 10 Pronotum 11 Left metepisternum 12 Terminal lamella of median lobe, dorsal view 13 Median lobe, left lateral view 14 Median lobe, dorsal view 15 Middle portion of median lobe, right lateral view. Scale lines: A = 1.0 mm (Fig. 10), B = 0.5 mm (Fig. 12), C = 1.0 mm (Figs 11, 13 - 15).

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).

Figures 66 - 67. Digital photographs of habitats for Chydaeus species 66 Shibali (6 km W), Fugong County, Yunnan Province, China, ca 2920 m; locality for Chydaeus fugongensis sp. n. 67 Shibali, Fugong County, Yunnan Province, China, ca. 2530 m; locality for Chydaeus asetosus sp. n. and Chydaeus bedeli difficilis Kataev & Schmidt

Figures 64 - 65. Digital photographs of habitats for Chydaeus species 64 Yaojiaping, Lushui County, Yunnan Province, China, ca. 2500 m; locality for Chydaeus satoi Ito and Chydaeus shunichii Ito 65 Fengxue Yakou, Lushui County, Yunnan Province, China, ca. 3150 m; locality for Chydaeus bedeli difficilis Kataev & Schmidt and Chydaeus shunichii Ito.