Scaphidium yuzhizhoui Tang, Tu & Li

Tang, Liang, Tu, Yue-Ye & Li, Li-Zhen, 2016, Notes on Scaphidium grande - complex with description of a new species from China (Coleoptera: Staphylinidae: Scaphidiinae), Zootaxa 4132 (2), pp. 279-282 : 279-281

1. Scaphidium yuzhizhoui Tang, Tu & Li , new species.

( Figs. 1–6 , 9, 11 )

Type material. Holotype: CHINA: Guangdong: Ƌ, glued on a card with labels as follows: “ China, Guangdong Prov., Ruyuan County, Nanling N. R., alt. 1050m, 15.VII.2012, Lie Ning & Zhi-Zhou Yu leg.” “ Holotype / Scaphidium yuzhizhoui / Tang, Tu & Li”[red handwritten label] ( SHNU). Paratypes. 3 33, same data as for the holotype ( SHNU); 1 3, Nanling, Pubuqun, VII.2006, Zi-Chen Wang leg. ( SHNU)

Description. BL: 8.1–9.2 mm, ED: 0.31–0.34 mm, PL/PW of male: 0.75–0.78.

Body black and glossy, mesofemora and metafemora with reddish fascia. Frons densely punctuate, vertex partialy impunctate, punctures mostly elongate and a little confluent. Pronotum raised above elytra, with lateral edges slightly sinuate. Antebasal puncture row impressed; disc densely punctuate, punctures round and well delimited, puncture intervals mostly a little larger than puncture diameters. Elytra with humeral protuberance indistinct, apical portion moderately impressed; discal punctation similar to that of pronotum, punctures on apical portion a little larger; discal puncture row absent; basal stria row impressed, with punctures about as coarse as those of pronotal antebasal row; sutural stria puncture row much finer. Prohypomera smooth with fine and sparse punctures. Mesepisterna smooth with moderately dense, moderately fine and very shallow punctures. Exposed abdominal sternites and tergites with coarse and relatively sparse punctures and densely reticulate microsculpture.

Male. Metasternum impressed in middle, with long semi-erect pubescence. Profemora ( Fig. 6 ) with tubercles arranged in three rows on ventral side. Protibiae slender ( Fig. 6 ) with tubercles on inner side and indistinct apical angle ( Fig. 9 ), slightly incurved in lateral view ( Fig. 6 ) and slightly curved outwards at apical third in front view ( Fig. 11 ). Aedeagus with sclerotized plates as in Figs. 3, 4 .

Female. Unknown.

Distribution. China (Guangdong).

Remarks. The new species resembles S. grande Gestro, 1880 and both have been collected at the same locality in the Nanling Nature Reserve. Since S. grande is a very variable species, its accurate identification must be based on male sexual characters. The new species can be distinguished from the latter one by protibiae slender with apical angle smaller (protibiae stout with subapical angle larger in S. grande , see Figs 7, 8 ), median sclerotized plate of aedeagus elongate with anteriolateral projections more developed (median sclerotized plate of aedeagus abbreviated with anteriolateral projections less developed in S. grande ). It is also very similar to S. inflexitibiale Tang & Li, 2010 , the differences between them listed in the modified key below.

Etymology. The species is named in honor of Mr. Zhi-Zhou Yu who collected most specimens of the new species. To accommodate the new species, the key of Scaphidium grande -complex ( Tang & LI, 2010) should be modified at the couplet #4 as follows:

4. Wide body form, PL/PW of male no more than 0.78, PL/PW of female no more than 0.69; lateral sides of pronotum shallowly

incurved near antebasal puncture row; male protibia slender and more or less incurred.................................................................. 5 - Narrow body form, PL/PW of male: 0.79–0.84, PL/PW of female: 0.75–0.77; lateral sides of pronotum almost straight near ante-

basal puncture row; male protibia stout and almost straight ............................................................................................... S. grande 5. Male profemora strongly swollen at basal 2/3 forming a blunt angle at apical third............................................................ S. laxum - Male profemora not swollen........................................................................................................................................................... 5a 5a. Male protibia strongly curved, as long as profemora ................................................................................................. S. inflexitibiale - Male protibia slightly curved, distinctly shorter than profemora................................................................................. S. yuzhizhoui

Figures

FIGURES 1 – 6. Scaphidium yuzhizhoui sp. n. 1,2 habitus 3 aedeagus 4 internal sac in detail 5 antena 6 male front leg in ventral view. Scales = 1 mm (1, 2, 5, 6), scales = 0.25 mm (3, 4).

FIGURES 7 – 11. Male front tibiae 7 – 9 lateral view 10, 11 front view 7, 8, 10 S. grande (7 Yunnan 8, 10 Hunan) 9, 11 S. yuzhizhoui. Scales = 1 mm.