New species and new records of the genus Deinopteroloma Jansson, 1946 (Coleoptera, Staphylinidae, Omaliinae) from China

Abstract New morphological, taxonomic and faunistic data of the genus Deinopteroloma Jansson, 1946 from China are provided. Two species are described and illustrated: D.songi Peng & L.-Z. Li, sp. n. (Xizang: Pailong) and D.spinigerum Peng & L.-Z. Li, sp. n. (Hunan: Mangshan). New provincial records are provided for D.hamatum Smetana, 1996 from Anhui, Zhejiang and Jiangxi, D.obtortum Assing, 2015 from Sichuan, and D.tricuspidatum Smetana, 1996 from Zhejiang.


Introduction
New morphological, taxonomic and faunistic data on the genus Deinopteroloma Jansson, 1946 includes 26 species distributed in Palaearctic and Oriental regions, with 12 of them known from China. The Deinopteroloma fauna of Sichuan with eight described species is currently the most diverse of all Chinese provinces (Assing 2015;Shavrin and Smetana 2016).
In recent years, we obtained numerous Deinopteroloma specimens collected during several field trips. Five species were identified, two of which are described and illustrated in the present study.

Material and methods
The examined material is deposited in the following public collections: SNUC Insect Collection of Shanghai Normal University, Shanghai, China CNC Canadian National Collection of Insects, Ottawa, Canada The genitalia and other dissected parts were mounted on plastic slides and attached to the same pin as the respective specimens. Photographs were taken with a Canon EOS 7D camera with a MP-E 65 mm macro lens or with a Canon G9 camera mounted on an Olympus CX31 microscope.
The following abbreviations were used in the text, with all measurements in millimeters:

BL
Body length: length of body from apices of mandibles to abdominal apex.

FL
Forebody length: length of forebody from the anterior margin of the mandibles to the posterior margin of the elytra.

HL
Head length: length of head from anterior margin of frons to posterior constriction of head. HW Head width: maximum width of head. AnL Antenna length: length of antenna from base of antennomere I to apex of antennomere XI.

PL
Pronotum length: length of pronotum along midline.

PW
Pronotum width: maximum width of pronotum.

EL
Elytral length: length at suture from apex of scutellum to posterior margin of elytra.

AL
Length of aedeagus: length of aedeagus from apex of longer paramere to base of aedeagal capsule.
The type labels were cited with the original spelling; different labels are separated by slashes. Smetana, 1996 (Figs 1, 2A-D, 5) Deinopteroloma hamatum Smetana, 1996: 79. Deinopteroloma hamatum: Smetana 2001: 57, Shavrin and Smetana, 2016.  Comparative notes. The original description was based on three type specimens from Guadun, Fujian (Smetana 1996). Considerable interspecific variability of D. hamatum was observed not only in external characters such as body size, coloration, punctation, and shapes of head, pronotum and elytra ( Fig. 1), but also in the shape of parameres and internal structures of aedeagus ( Fig. 2A, B). The shape of the posterior margin of the male tergite VIII is constant (Fig. 2D). It is recorded here from Anhui, Zhejiang and Jiangxi for the first time. Some specimens were sifted from wet leaves and moss on the rocks near a stream at altitudes from about 460 to 910 m (Fig. 5). Habitus as in Fig. 3A. Coloration: Body dark-brown; pronotum with broadly dark-yellowish lateral margins; each elytron with 3 or 4 yellowish brown tubercles; antenna with antennomeres I-IV yellowish and V-VIII gradually more infuscate apically, VIII-XI blackish-brown; maxillary palpi dark-yellowish.

Deinopteroloma obtortum
Head transverse; posterior part of clypeus and vertex distinctly elevated, with indistinct lateral impressions in middle part and semicircular deep impression in front of ocelli, infraorbital ridges slightly impressed; eyes large and convex; small acute postocular ridge situated away from posterior margin of eye; ocelli large; frons smooth and glossy. All antennomeres longer than broad; measurements of antennomeres (length): I: 0.22; II: 0.14; III-VII: 0.16; VIII: 0.13; IX-X: 0.11; XI: 0.19.
Pronotum distinctly transverse; lateral margins finely crenulate and with somewhat regular outline; lateral portions strongly impressed; disc of pronotum with wide, very convex middle elevation and with distinct longitudinal impression; punctation coarse, rather dense in posteromedian portions, sparser in anteromedian and lateral portions, and very irregular and scattered in median portion.
Elytra without distinct longitudinal ridges; suture elevated in posterior two thirds; punctation coarse and arranged in partly irregular series (except in posterior portion of elytra); each elytron with approximately 3 or 4 smooth tubercles. Hind wings present.
Male. Protarsomeres I-IV very weakly dilated; sternites III-VII unmodified; sternite VIII (Fig. 3B) distinctly transverse, posterior margin broadly concave in middle; aedeagus as in Fig. 3C, D, both parameres slender and slightly curved in ventral view, distinctly extending apex of median lobe; internal sac with pair of sclerotized spines.
Female. Protarsomeres I-IV not dilated. Abdominal sternite VIII without posterior excision. Otherwise similar to male.
Comparative notes. Based on the coloration of the body, 6-8 smooth tubercles of the elytra, the presence of pronounced elevations on the pronotum and elytra, as well as the morphology of the aedeagus, the new species is most similar to D. sextuberculatum Shavrin & Smetana, 2016, from which it can be distinguished by the darker coloration, the smaller size (D. sextuberculatum: 4.25-4.92 mm), the shape of the pronotum, the deeper posterior excision of the male sternite VIII and the stouter median lobe of the aedeagus. For illustrations of D. sextuberculatum see Shavrin and Smetana (2016).
Distribution and natural history. The type locality is situated in Pailong to the northeast of Linzhi, southern Xizang. The specimens were sifted from leaf litter, moss and mushrooms in broad-leaved forests at an altitude of 2100 m (Fig. 7).
Etymology. Patronymic, named after Xiao-Bin Song, who collected some of the type specimens.  Habitus as in Fig. 4A. Coloration: Body dark-brown; pronotum with broadly dark-yellowish lateral margins; each elytron with three yellowish-brown tubercles; antenna with antennomeres I-IV light-brown and V-VI gradually more infuscate apically, VII-XI blackish brown; maxillary palpi dark-yellowish.
Pronotum distinctly transverse; lateral margins finely crenulate and with somewhat irregular outline; lateral portions indistinctly impressed; disc of pronotum with wide, very convex middle elevation and with distinct longitudinal impression; punctation coarse, dense in posteromedian portions, rather sparser in anteromedian and lateral portions, and irregular and scattered in median portion.
Elytra without distinct longitudinal ridges; punctation coarse and arranged in partly irregular series (except in posterior portion of elytra); each elytron with approximately three smooth tubercles. Hind wings probably present.
Male. Abdominal sternites III-VII unmodified; sternite VIII ( Fig. 4B) distinctly transverse, posterior margin weakly concave in the middle; aedeagus as in Fig. 4C, D, both parameres with small hook-shaped apex, weakly asymmetric and slender, slightly extending apex of median lobe; internal sac with three sclerotized spines.
Female. Unknown. Comparative notes. As can be inferred from the similar morphology of the aedeagus, the new species is allied to D. tricuspidatum Smetana, 1996 (Fujian: Guadun), from which it differs by the finer punctation of the body, by the presence of three yellowishbrown tubercles on each elytron and the shape of sclerotized spines of the internal sac.
Distribution and natural history. The type locality is situated in Mangshan to the south of Yizhang, southern Hunan. The specimens were sifted from leaf litter in mixed deciduous forests at an altitude of 1400 m (Fig. 8).
Etymology. The specific epithet (Latin, adjective: with spines) alludes to the presence of sclerotized spines in the internal sac of the aedeagus. Comparative notes. Deinopteroloma tricuspidatum was previously known from Guadun, Fujian (Smetana 1996). Considerable interspecific variability of D. tricuspidatum was observed in body size, punctation and the shape of pronotum (Fig. 2F, G). The shape of head and the morphology of female genital segment are constant. It is recorded from Zhejiang represents for the first time. For illustrations of D. tricuspidatum see Fig. 2F, G and Figs 1-3 in Smetana (1996).
for comments on a previous version of the manuscript. The study is supported by the National Natural Science Foundation of China (No. 31201734, 31101659 and No. 31172134), the Foundation of Shanghai Municipal Education Commission (No. 12YZ077 and No. 13YZ062), the 63rd batch of China Postdoctoral Science Fund First Class Funding (No. 307E-9103-00-003094) and Shanghai Normal University (DZL125 and B-9013-11-003127).