Anthobium hydraenoides, Shavrin & Smetana, 2017

Shavrin, Alexey V. & Smetana, Aleš, 2017, A revision of Eastern Palaearctic Anthobium Leach, 1819 (Coleoptera: Staphylinidae: Omaliinae: Anthophagini). I. Gracilipalpe, morchella and nigrum groups, Zootaxa 4365 (1), pp. 1-39 : 16-19

publication ID	https://doi.org/ 10.11646/zootaxa.4365.1.1
publication LSID	lsid:zoobank.org:pub:5F132840-6E2F-42E6-8DF2-9EF191DE243C
DOI	https://doi.org/10.5281/zenodo.6017644
persistent identifier	https://treatment.plazi.org/id/03FC87DC-FFB4-9D34-FF0D-3A67FA9EFBC8
treatment provided by	Plazi
scientific name	Anthobium hydraenoides
status	sp. nov.

Treatment

3.2.2.2. Anthobium hydraenoides View in CoL sp.n.

( Figs. 40 View FIGURES 39–41 , 57, 60 View FIGURES 56–61 , 62 View FIGURE62 , 64 View FIGURE 64 )

Paratypes (9 specimens): 2 ♂♂ [one specimen was dissected: plastic plate with aedeagus, abdominal tergite VIII, sternite VIII and apical segment in Canadian balsam was pinned under the plate with beetle], 5 ♀♀: same data as the holotype (1 ♂, 3 ♀♀: NSMT; 1 ♂, 2 ♀♀: CAS), 1 ♂, 1 ♀: ‘CHINA: N-Yunnan [C 2005-07] | Diqing Tibet. Aut. Pref., | Deqin Co., Meili Xue Shan, E-side, | 12 km SW Deqin, 2890 m, | 28°25.30'N, 98°48.47'E,’ <rectangular label, printed>, ‘small creek valley, mixed forest | with bamboo, leaf litter, moss, | dead wood, sifted, 9.VI.2005, | leg. M. Schülke [C 2005-07]’ <rectangular label, printed> (CSC). All paratypes with additional red rectangular printed label: ‘PARATYPE | Anthobium | hydraenoides sp.n. | Shavrin A. & Smetana A. 2017’.

Two specimens without abdomen, with the same data as the holotype are not included in the type serie ( NSMT).

Description. Measurements (n=10): HW: 0.85–0.89, HL: 0.55–0.59; AL (holotype): 1.76; OL: 0.24–0.25; PL: 0.70–0.75; PW: 1.30–1.35; ESL: 1.62–1.67; EW: 1.67–1.76; AW: 1.30–1.50; MTbL (holotype): 0.97, MTrL (holotype): 0.38 (MTrL 1–4: 0.25; MTrL 5: 0.13); AedL: 0.90; TL: 3.65–4.34 (holotype: 3.95).

FIGURES 42–55. Body parts of Anthobium (42, 44, 46, 48, 50, 52, 54— A. morchella , 43, 45, 47, 49, 51, 53, 55— A. nigrum ): 42–43—ventral aspect of head, 44–45—ventral aspect of prothorax, 46–47—scutellum (dorsal view), 48–49—ventral aspect of mesothorax, 50–51—ventral aspect of metathorax (without metanepisternum), 52–53—metendosternite (ventral view), 54– 55—ventral aspect of elytron. Scale bars: 0.1 mm.

In external appearance similar to A. morchella sp.n. Body shiny, yellow-brown to reddish-brown; head and antennomeres 3–11 brown; mouthparts, antennomeres 1–2, lateral parts of pronotum and elytra and legs yellow to yellow-brown. Posterior parts of infraorbital ridges with transverse irregular wrinkle-shaped sculpture between punctures, smaller and less rugose than that in A. morchella sp.n. Punctation of infraorbital ridges deep and very dense; middle part of neck with regular, large moderately dense punctation; pronotum with very dense, deep and slightly rugose punctation, denser on medio-apical and somewhat larger and sparser on lateral portions; scutellum with irregular, small and dense punctation; punctation of elytra distinctly larger and deeper than that on pronotum, denser and smaller in presutural area, each elytron with nine vague and tangled longitudinal rows of serial punctures, each of the three closely running rows separated from rest by impunctated longitudinal elevations; abdominal tergites with dense and moderately large smoothed punctation. Habitus as in Fig. 40 View FIGURES 39–41 .

Head 1.5 times as wide as long; middle portion irregularly elevated, with a pair of medial impressions at level of anterior margin of eyes and small moderately deep transverse impression on middle portion of head, with moderately deep and narrow occipital furrow and very deep elongated grooves in front of ocelli reaching middle length of eye; head more or less gradually narrowed toward neck behind obtuse postocular ridges; distance between postocular ridge and posterior margin of eye as long as two nearest facets; anterior portion between antennal insertion and anterior margin of eye with moderately wide semicircular notch. Apical segment of maxillary palp significantly elongated, about four times as long as preceeding segment. Measurements of antennomeres (holotype): 1: 0.18 × 0.10; 2: 0.13 × 0.06; 3: 0.16 × 0.05; 4–7: 0.16 × 0.06; 8–9: 0.15 × 0.06; 10: 0.14 × 0.07; 11: 0.21 × 0.07.

Pronotum 1.8 times as wide as long, widest in middle, strongly narrowed posteriad from there; anterior angles slightly protruded anteriad; latero-apical and lateral edge of pronotum with irregular, moderately small crenulation; middle elevation of pronotum with irregular longitudinal and paired semioval medio-basal impressions.

Elytra reaching apical margin of abdominal tergite IV–VII; each elytron with three indistinct median longitudinal elevations.

Abdomen with a pair of small, oval tomentose spots in middle of tergite V.

Male. Apical margin of abdominal tergite VIII slightly sinuate. Apical margin of abdominal sternite VIII straight. Aedeagus ( Fig. 56 View FIGURES 56–61 ) with moderately wide basal part gradually narrowed towards rounded apex of median lobe; parameres slightly exceeding apex of median lobe, with two short apical setae; internal sac narrow and long. Aedeagus laterally as in Fig. 60 View FIGURES 56–61 .

Female. Apical margins of abdominal tergite VIII and sternite VIII straight to slightly rounded.

Comparative notes. Anthobium puetzi sp.n. differs from other two species of the morchella group by the presence of three indistinct longitudinal elevations on the elytra and by the shorter parameres slightly exceeding apex of median lobe of the aedeagus.

Distribution. The new species is known from two locations ( Fig. 62 View FIGURE62 ) in Meili Xue Shan range in Yunnan, China.

Bionomics. Specimens were collected at elevations from 2890 to 3450 m a.s.l., in remnant of an original Abies , Betula, Rhododendron forest by treading of quite wet, mostly grassy vegetation in a seepage (locality: C150) and in mixed forest with bamboo by sifting of leaves, mosses and dead wood (locality: C 2005-07 ( Fig. 64 View FIGURE 64 )). Specimens from the locality C 2005-07 were collected together with type specimens of A. densepunctatum sp.n. (see below).

Etymology. The specific epithet is derived from the generic name Hydraena Kugelann, 1795 ( Coleoptera , Hydraenidae ). The suffix - oides denotes the somewhat similar shape of the forebody of the new species.