Bolitogyrus magnimaculosus, 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 : 463-466

Bolitogyrus magnimaculosus sp. nov.

( Figs. 4, 4-1 )

Type material. Holotype ♂, CHINA: Hainan Province: Ledong County, Jianfeng Ling Core Area, Fifth District (18°44′N, 108°52′E), 978 m, 3. XII. 2009, coll. Meiying Lin. Paratypes: CHINA: Hainan Province: 1 ♂, Baisha County, Yuanmen Township, Hongkan Reservoir (19°05′N, 109°29′E), 525 m, 24. XI. 2009, coll. Hongbin Liang; 1 ♂, Ledong County, Jianfeng Ling, Yulingu (18°45′N, 108°55′E), 666 m, 5. XII. 2009, coll. Xinlei Huang.

Description. Head black; pronotum reddish brown to dark reddish brown, with a very large characteristically shaped black spot in middle ( Fig. 4 B); scutellum with color similar to pronotum; elytra reddish brown to dark reddish brown, with an ill-defined V-shaped yellow to reddish yellow macula in basal half, with humeral angle and posterior margin slightly paler; abdominal tergites III–V reddish brown, with a wide black median stripe on each; VI–VII black with subtriangular anterolateral areas reddish brown; VIII black with basal half yellowish, nearly transparent; antennae reddish brown, with antennomere I paler, VI to X darkened and XI yellowish, labrum dark reddish brown to black, mandibles dark reddish brown, maxillary and labial palpi reddish brown; legs yellowish brown, apical portion of femora dark brown, tibiae dark brown laterally.

BL = 15.3 mm, BW = 3.1 mm, HL/PL/EL = 1.00: 1.19: 1.39, HW/PW/EW = 1.00: 1.09: 1.23

Head ( Fig. 4 A) round, wider than long, in dorsal view HW/HL = 1.25, HEL/HTL = 5.88; frons with shallow, Y-shaped impression; four 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 setiferous puncture situated very close to posterior margin of eye, separated by a distance equal to the diameter of the puncture; dorsal surface shallowly and sparsely punctured.

Pronotum ( Fig. 4 B) wider than long, PW/PL = 1.15, moderately narrowed anteriorly, lateral and posterior margins broadly rounded; posterolateral and posterior margins strongly explanate; one setiferous puncture in each dorsal row, situated close to anterior margin; large lateral setiferous puncture very close to and with socket almost touching marginal groove; surface strongly polished, without microsculpture, only sparsely and extremely shallowly punctate near anterior angle.

Elytra ( Fig. 4 C) wider than long, EW/EL = 1.11, ESL/EL = 0.55, slightly broadened posteriorly; surface relatively evenly covered with coarse and moderately dense punctures, leaving macula impunctate; 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–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. 4-1 A) with basal ridge complete, trisinuate; sternite VIII ( Fig. 4-1 B) with five long setae on each side, apical margin with a very shallow middle emargination, with a small area around the emargination impuncate; sternite IX ( Fig. 4-1 C) with basal portion very short and wide, apical margin with a deep emargination, with three long seta on each side; tergite X ( Fig. 4-1 D) with basal side broadly concave, apical margin evenly converging to apex; aedeagus in lateral view ( Fig. 4-1 E) with apex of paramere protruding slightly beyond that of median lobe, median lobe with five tooth-shaped processes pointing toward parameral side, one relatively large at apex, two minute ones along lateral margins subapically, two additional ones near midline at about 1/4 apically ( Figs. 4 E, 4-1H); aedeagus in parameral view ( Fig. 4-1 F) with paramere elongate, gently narrowed in middle, apical third gradually narrowed into rounded apex ( Figs. 4 D, 4-1G); median lobe from base to apex nearly parallelsided, almost as wide as paramere, apical portion abruptly constricted into small and narrow apex ( Figs. 4 E, 4-1H); apical margin of paramere with four to five apical setae on each side, underside covered with numerous sensory peg setae generally along apical and lateral sides forming two arched longitudinal lines ( Figs. 4 D, 4-1G).

Female unknown.

Distribution. Bolitogyrus magnimaculosus sp. nov. is known from two localities in Hainan Province: Jianfeng Mountain and Baisha County, Hongkan Reservoir at altitudes between 525 m and 978 m. The specimen from near Hongkan Reservoir was collected by beating the shrubs. The examined specimens were collected from November to December.

Diagnosis. This new species is very similar to B. elegantulus Yuan et al. in the relatively large body size, color pattern of the body and the median lobe of aedeagus having two additional tooth-shaped processes near midline far below the apex. It can be distinguished from the latter by the paramere of the aedeagus with the sensory peg setae arranged in a different shape, and the median lobe with distinctly narrower and more pointed apex.

Etymology. The specific name is derived from the Latin prefix magni - (large) and the adjective maculosus (spotted), referring to the very large characteristically shaped black spot on pronotum.

Figures

FIGURE 4. Bolitogyrus magnimaculosus sp. nov.: A, head (1.0 mm); B, pronotum (1.0 mm); C, elytra (1.0 mm); D, underside of paramere (0.2 mm); E, apical portion of median lobe, parameral view (0.2 mm). (Scale lengths in parentheses).