Bolitogyrus loculus, Cai, Yan-Peng, Zhao, Zong-Yi & Zhou, Hong-Zhang, 2015

Cai, Yan-Peng, Zhao, Zong-Yi & Zhou, Hong-Zhang, 2015, Taxonomy of the genus Bolitogyrus Chevrolat (Coleoptera: Staphylinidae: Staphylinini: Quediina) from China with description of seven new species, Zootaxa 3955 (4), pp. 451-486 : 460-463

Bolitogyrus loculus sp. nov.

( Figs. 3, 3-1 )

Type material. Holotype ♂, CHINA: Yunnan Province: Mengla County, Xishuangbanna Menglun Nature Reserve, Xipian, 620 m, 21. II. 2004, coll. Jie Wu and Jiaolin Zhang. Paratypes: CHINA: Yunnan Province: 2 ♀♀, Mengla County, Xishuangbanna Menglun Nature Reserve, 560 m, 9. II. 2004, coll. Jie Wu; 2 ♀♀, Mengla County, Xishuangbanna Menglun Nature Reserve, 810 m, 10. II. 2004, coll. Jie Wu; 1 ♂, Mengla County, Xishuangbanna Menglun Nature Reserve, 860 m, 11. II. 2004, coll. Jie Wu; 2 ♂♂, 1 ♀, Mengla County, Xishuangbanna Menglun Nature Reserve, 690 m, 14. II. 2004, coll. Jie Wu.

Description. Head black, with slight metallic hue; pronotum black, with explanate margin somewhat paler; scutellum with color similar to pronotum; elytra with a very large yellowish brown to dark brown macula in basal half from humeral angle to slightly behind middle, posterior sutural area and posterolateral angle yellowish brown to dark brown, leaving areas along scutellum, suture and most of apical half dark brown to blackish brown; abdomen almost entirely black, tergites III–V strongly iridescent; antennae yellowish brown, with antennomere I paler, labrum and mandibles dark brown, maxillary and labial palpi pale brown; legs yellowish brown, with apical portion of mid and hind femora dark brown.

BL = 9.7 mm, BW = 2.3 mm, HL/PL/EL = 1.00: 1.29: 1.52, HW/PW/EW = 1.00: 1.12: 1.30

Head ( Fig. 3 A) round, wider than long, in dorsal view HW/HL = 1.27, HEL/HTL = 7.99; frons with moderately deep, Y-shaped impression; three setiferous punctures along medial margin of eye between anterior and posterior frontal setiferous punctures; posterior frontal setiferous puncture situated anterior to level of posterior margin of eye, separated from posteriomedial margin of eye by a distance about equal to the diameter of the puncture; temporal puncture separated from posterior margin of eye by a distance about equal to the diameter of the puncture; dorsal surface quite polished, very shallowly and very sparsely punctate.

Pronotum ( Fig. 3 B) wider than long, PW/PL = 1.09, slightly narrowed anteriorly, lateral and posterior margins broadly rounded; posterolateral and posterior margins moderately explanate; one setiferous puncture in each dorsal row, situated close to anterior margin; large lateral setiferous puncture with socket almost touching marginal groove; surface strongly polished, without microsculpture, only sparsely and extremely shallowly punctate near anterior angle.

Elytra ( Figs. 3 C, D) slightly wider than long, EW/EL = 1.08, ESL/EL = 0.54, slightly broadened posteriorly; surface unevenly covered with moderately dense and coarse punctures, with posterior sutural area and posterolateral angle distinctly less punctate, with basal sutural area slightly denser; surface between punctures without microsculpture. Hind wings fully developed.

Abdominal tergites III–V with middle portion almost impunctate, with transverse depressions at base, punctures before depressions distinctly coarse and dense; VI with basal area only vaguely depressed, punctures in middle portion slightly sparser than adjacent areas; VII–VIII finely punctate, without transverse depression; VII with whitish apical seam of palisade fringe.

Male with first four segments of foretarsus moderately dilated, sub-bilobed; segment II about as wide as apex of tibia; tergite VIII ( Fig. 3-1 A) with basal ridge disrupted in middle; sternite VIII ( Fig. 3-1 B) with four long setae on each side, apical margin with a very shallow and inconspicuous middle emargination, with a small area around the emargination impuncate; sternite IX ( Fig. 3-1 C) with basal portion very short and wide, apical margin with a deep emargination, with two long setae on each side; tergite X ( Fig. 3-1 H) with basal side broadly concave, apical margin widely rounded; aedeagus in lateral view ( Fig. 3-1 D) with apex of paramere protruding slightly beyond that of median lobe, median lobe slightly curved toward paramere at apex; aedeagus in parameral view ( Fig. 3-1 E) with paramere gradually narrowed from base to middle portion, then abruptly constricted from about apical 1/5 forming narrow apex with an inconspicuous apical emargination ( Figs. 3 E, 3-1F); median lobe with middle portion nearly parallel-sided, then slightly dilated laterally below apex, at widest point with one small tooth-shaped process on each side, apex subacute, with arcuate process along apical margin ( Figs. 3 F, 3-1G); apical portion of paramere with three apical setae and two long subapical setae on each side, underside covered with numerous sensory peg setae, two groups along apex and lateral sides, others irregularly scattered below middle area ( Figs. 3 E, 3-1F).

Female with first four segments of foretarsus not appreciably different from those of male; tergite VIII ( Fig. 3- 1 I) with basal ridge disrupted in middle, with a small middle emargination on apical margin, deeper than wide; tergite X ( Fig. 3-1 J) with basal side deeply and broadly concave, with an oval area in middle strongly sclerotized and raised, apical margin widely rounded.

Distribution. Bolitogyrus loculus sp. nov. is known only from the type locality in the south of Yunnan Province: Xishuangbanna Menglun Nature Reserve at altitudes between 560 m and 860 m. The specimens were collected from logs in February.

Diagnosis. This new species can be easily distinguished from other congeners by the unique shape of the narrowly constricted apical portion of paramere.

Etymology. The specific name is from the Latin noun loculus (a compartment), referring to the shape of the maculae on elytra.

Figures

FIGURE 3. Bolitogyrus loculus sp. nov.: A, head (1.0 mm); B, pronotum (1.0 mm); C, elytra (1.0 mm); D, elytra in different color (1.0 mm); E, underside of paramere (0.2 mm); F, apical portion of median lobe, parameral view (0.2 mm). (Scale lengths in parentheses).