Megalinus yolounganus spec. nov, 2017

Bordoni, Arnaldo, 2017, New data on the Xantholinini from China. 28. New species from Yunnan, Sichuan and Hubei (Coleoptera, Staphylinidae), Beiträge Zur Entomologie = Contributions to Entomology 67 (2), pp. 271-274 : 272-273

Megalinus yolounganus spec. nov .

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(Figs 7-9)

Examined material: Holotype ♂: China, Yunnan, Yolougshan mts, Baisshui, 2900-3500 m, 27.08N, 100.14E, V. Kuban 7-12.VII.1990 ( NHMB).

Description: Length of body 11 mm; from anterior margin of head to posterior margin of elytra: about 5.5 mm. Body black with brown black pronotum and elytra; antennae and legs brown. Head sub-rectangular, with largely rounded posterior angles. Eyes mediumsized and a little protruding. Surface of head with deep, not particularly spaced punctures, apart the clypeus, closed on the sides. Pronotum sub-rectangular, a little dilated forward, as long and wide as head, with oblique anterior margins and largely rounded anterior angles. Surface with dorsal series of numerous irregular punctures and lateral series of 9-10 irregular punctures; other punctures near the anterior angles. Elytra broad, dilated posteriad, with rounded humeral angles. Surface with numerous, superficial punctures, arranged in numerous series. Abdomen with traces of more or less transverse micro-striation and very fine, sparse punctation. Male genital segment as in Fig. 7; sternite of the same as in Fig. 8. Aedeagus (Fig. 9) 1.8 mm long, sub-spherical, with very narrow and short parameres; inner sac tape like, broad, folded one time on itself, covered with fine scales and with a series of long, narrow spines on the distal portion.

Figs 1-6: Head, last three antennomeres, tergite and sternite of the male genital segment, aedeagus of Mahavana vulcanicola spec. nov. (1-5): Evaginated inner sac of Phacophallus japonicus (CAMERON) (6) (scale bar: 0.1 mm).

Atopolinus siping spec. nov.

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( Figs 10-12 )

Examined material: Holotype ♂: China, Sichuan, 10 km S Siping , J. Jenis 21-22.VI.2005 ( cJ).

Description: Length of body 6.7 mm; from anterior margin of head to posterior margin of elytra: about 3.5 mm. A small, shiny, reddish brown dark Atopolinus COIFFAIT, 1982 , with brown light antennae and legs. Head ovoid elongate, with a little rounded sides and largely rounded posterior angles. Eyes small and a little protruding. Surface of head with fine punctation, more dense on the sides. Pronotum narrow, longer and narrower than head, with oblique anterior margins, almost obsolete anterior angles and sinuate sides. Surface with dorsal series of 8-9 fine punctures and lateral series of 6-7 irregular punctures. Elytra sub-rectangular, slightly dilated posteriad, with sub-rectilinear sides and marked humeral angles. Surface with numerous series of fine, not particularly dense punctation. Abdomen with few, fine, spaced punctures on the sides.

Figs 7-12: Male genital segment, sternite of the same, aedeagus of Megalinus yolounganus spec. nov. (7-9) and Atopolinus siping spec. nov. (10-12) (scale bar: 0.1 mm).

Male genital segment as in Fig. 10 ; sternite of the same as in Fig. 11 . Aedeagus ( Fig. 12 ) sub-ovoid, proximally truncate, with asymmetric pseudoparameres; inner sac more or less tape like, covered with fine spinulae and scales.

Etymology: The specific epithet refers to the type locality, as a noun in apposition.

Distribution: The species is known only from the type locality.

Remarks: This species is closely related to A. sinuatus BORDONI, 2013 from Yunnan (Xishuangbanna) from which differs by the following characters: head more ovoid and forward narrower, with larger punctation, eyes smaller and less protruding, shorter elytra and different parameres and inner sac of the aedagus.

Etymology: The specific epithet refers to the type locality.

Acknowledgements

Distribution: The species is known only from the type locality.

I wish to thank the following colleagues: M. Borer (Naturhistorisches Museum, Basel, Switzerland), Y. Hayashi (Kawanishi, Japan), J. Janak (Rtyne nad Bilinou, Cekia).

Remarks: This taxon belongs to a genus made up of predominantly mountainous species, distributed from Pakistan to China and Taiwan. M. yolounganus differs from M. hayashii BORDONI, 2002 from Yunnan (Yulong Shan, Jizu Shan, Lijang) by size, color, punctation and in particular by the structure of inner sac of the aedeagus that present only one series of spines instead of two.

Figures

Figs 7-12: Male genital segment, sternite of the same, aedeagus of Megalinus yolounganus spec. nov. (7-9) and Atopolinus siping spec. nov. (10-12) (scale bar: 0.1 mm).