Stenus asprivestis, Puthz, 2013

Puthz, V., 2013, Further new Stenus LATREILLE from Taiwan (Coleoptera, Staphylinidae) th, Linzer biologische Beiträge 45 (1), pp. 885-891 : 889-891

Stenus asprivestis nov.sp. (Fig. 4)

T y p e m a t e r i a l: Holotype (3): TAIWAN: Hualien Hsien: Taroko National Park, Nanhushi Hut , 2200m, 8.V.1990, A. Smetana ( T 48 ): in coll. A. Smetana (Ottawa).

D e s c r i p t i o n: Brachypterous, black with a faint brownish hue, moderately shiny, head and pronotum coarsely and very densely punctate, elytra very coarsely and very densely punctate, pronotum and elytra conspicuously uneven, punctuation of abdomen coarse and dense (anteriorly), moderately fine and dense (posteriorly); pubescence short, recumbent. Segment 1 of maxillary palpi yellowish, segment 2 reddish yellow, segment 3 brownish. Antennae reddish brown, club infuscate. Legs reddish brown, apices of femora narrowly infuscate, tarsi brown. Clypeus black, labrum dark brown, moderately sparsely pubescent.

Length: [3.8-] 4.0mm (forebody: 1.8mm).

PM of the HT: HW: 33.5; DE: 18; PW: 27; PL: 26; EW: 35; EL: 31,5; SL: 24.

M a l e: Metasternum broadly and shallowly convex, moderately coarsely and moderately densely punctate, interstices mostly smaller than diameter of punctures, very shallowly reticulate. Anterior sternites simple. Sternite 6 with a broad and shallow impression in posterior middle, which is finer and denser punctate than the sides of the sternite, posterior margin very shallowly emarginated; sternite 7 moderately broadly shallowed along middle, extremely finely and densely punctate and pubescent, posterior margin very shallowly emarginated. Sternite 8 with a moderately narrow notch in about posterior sixth to seventh of the sternite. Sternite 9 and tergite 10 as in the previous species. Aedeagus (fig. 4), apical portion of median lobe short, acute-angled; parameres longer than median lobe, with 13-16 very long preapical setae.

F e m a l e: Unknown.

In nearly all respects very similar to S. aspripennis , but the head less broad, the elytral suture contiguous, the paratergites slightly broader and more distinctly bent ventrad.

C o m p a r a t i v e n o t e This new species may be distinguished from its nearest relatives as indicated in the key below.

E t y m o l o g y: Because of the uneven suface of the forebody I name this new species " asprivestis " (Lat.= with uneven/rough clothing).

These four new species should be inserted in my key of the non-spotted Taiwanese Stenus as follows:

55a Pronotum and elytra conspicuously uneven ............................................................. 55a1

- Pronotum and elytra not conspicuously uneven...........................................................55

55a1 Head narrower than elytra. 3: Aedeagus (fig. 4). ♀: Unknown. 3.8-4.0mm (FB 1.8mm). Hualien Hsien .................................................................. S. asprivestis nov.sp.

- Head broader or as broad as elytra ...........................................................................55a2

55a2 Elytra stronger trapezoid, suture gapes open posteriad. 3: Aedeagus (fig. 1). ♀: Spermatheca (fig. 6). 3.4-3.6mm (FB 1.8-1.9mm). Nantou Hsien ................................... ...................................................................................................... S. aspripennis nov.sp.

- Elytra less trapezoid, suture contiguous posteriorly................................................. 55a3

55a3 Abdominal punctuation coarser, punctures on tergite 7 as large as basal cross section of antennal segment 3, interstices as wide as diameter of punctures. 3: Aedeagus (fig. 2). ♀: Spermatheca (fig. 5). 3.4-3.6mm (FB 1.8-1.9mm). Taichung Hsien ............. ..................................................................................................... S. aspriformis nov. sp.

- Abdominal punctation finer, punctures on tergite 7 as large as a facet near medial eye margin, interstices wider than diameter of punctures. 3: Aedeagus (fig. 3). ♀: Spermatheca (fig. 7). 3.5-4.2mm (FB 1.8-2.0mm). Kaohsiung Hsien.............................. .................................................................................................. S. asprisculptus nov. sp.

Acknowledgement

My thanks are due to Dr. Aleš Smetana (Ottawa), who provided the insects for study.

Zusammenfassung

4 neue Arten der Gattung Stenus LATREILLE 1797 aus Taiwan werden beschrieben: Stenus aspriformis nov.sp., S. aspripennis nov.sp., S. asprisculptus nov.sp., S. asprivestis nov.sp.

References

PUTHZ V. (2012): On the Stenus LATREILLE 1797 from Taiwan with non-spotted elytra ( Coleoptera , Staphylinidae ) (327 th Contribution to the Knowledge of Steninae). — Linzer biologische Beiträge 44 (2): 1431-1475.

Author’s address: Dr. Volker PUTHZ

Burgmuseum Schlitz, Naturwissenschaftliche Abteilung

Vorderburg 1

D-36110 Schlitz, Germany

E-Mail: Stenus [e-mail]

Figs 1-13: Ventral aspect of aedeagus (1-4), spermatheca (5-7), metasternum (8-13) of Stenus aspripennis nov. sp. (1, 8, T 30; 6, 9, T 29), S. aspriformis nov. sp. (2, 11, T 35; 5, 10, T 35), S. asprisculptus nov. sp. (3, 7, 13, T 171; 12, T 140), S. asprivestis nov. sp. (4, HT).- Scale bar = 0.1mm (1 = 2-4).