Leptobium ilgazicum, Assing, 2010

Assing, V., 2010, A revision of Leptobium CASEY. VII. Two new species from Turkey and Spain, and additional records, Linzer biologische Beiträge 42 (2), pp. 1037-1043 : 1040-1043

Leptobium ilgazicum nov.sp. ( Figs 8-14 )

T y p e m a t e r i a l: Holotype: "TR [7a] - Çankırı, 67 km SW Kastamonu, 10 km NNW Kurúunlu, 1560 m, 40°55'40''N, 33°15'30''E, 24.III.2010, V. Assing / Holotypus Leptobium ilgazicum sp. n. det. V. Assing 2010 " (cAss). Paratypes: 1, 1: same data as holotype (cAss).

D e s c r i p t i o n: Measurements (in mm) and ratios (range; n=3): HL: 0.84-0.89; HW: 0.80-0.84; PW: 0.80-0.85; PL: 0.93-0.98; EL: 0.58-0.65; TiL: 0.68-0.70; TaL: 0.62-0.70; ML: 1.05-1.13; TL: 6.6-7.0; HL/HW: 1.05; PW/HW: 1.00-1.01; PL/PW: 1.12-1.15; EL/PL: 0.62-0.66; TiL/TaL: 1.00-1.10.

Habitus as in Fig. 8 . Coloration of the L. illyricum type: head, pronotum, and abdomen, except for the apex blackish; elytra and abdominal apex (broad posterior margin of segment VII; segments VIII-X) reddish; legs and antennae reddish.

Head weakly oblong (see ratio HL/HW), with sparse and relatively fine punctation; microsculpture absent ( Fig. 9 ); eyes approximately half as long as postocular region ( Fig. 10 ).

Pronotum approximately as wide as head (see ratio PW/HW); punctation similar to that of head, but somewhat denser ( Fig. 9 ).

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Elytra slightly wider and at suture distinctly shorter than pronotum (see ratio EL/PL and Fig. 9 ); punctation similar to that of pronotum, but less defined; microsculpture absent. Hind wings reduced.

Abdomen subparallel, at segment VI approximately 1.05 times as wide as elytra; punctation relatively dense on tergites III-VI; interstices with shallow microsculpture; posterior margin of tergite VII without palisade fringe.

Male: sternite VIII posteriorly with cluster of darker setae on either side of middle ( Fig. 11 ), posterior margin indistinctly concave in the middle; sternite VIII with narrow posterior incision, its depth approximately 0.4 times the length of sternite ( Fig. 12 ); aedeagus approximately 1.1 mm long, shaped as in Figs 13-14 , dorsal plate with weakly pronounced median carina.

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C o m p a r a t i v e n o t e s: Among the Turkish Leptobium species of similar size and coloration, L. ilgazicum is most similar to L. anlasi ASSING from Manisa. It is distinguished from this species by the following external and sexual characters: elytra slightly shorter, more slender, less convex in cross-section, and with coarser and more defined punctation; male sternite VII posteriorly with clusters of finer and shorter setae; aedeagus with dorsal plate less straight in lateral view, apically more abruptly narrowed and with fine tip; ventral process more slender in lateral view and differently shaped in ventral view. From other Turkish congeners of similar size and coloration ( L. assingi BORDONI , L. tauricum GUSAROV , L. ponticum ASSING ), it is distinguished as follows:

from L. assingi (southern Anatolia) by the more slender elytra, the broader and shorter dorsal plate of the aedeagus, as well as by the more asymmetric and apically more acute ventral process of the aedeagus;

from L. tauricum (western and northwestern Anatolia) by smaller body size, less dense punctation of the forebody, more slender elytra, the shape and chaetotaxy of the male sternite VII ( L. tauricum : posterior margin distinctly concave, posterior clusters with darker, longer, and stouter setae), and by the completely different shapes of the ventral process and the dorsal plate of the aedeagus;

from the geographically close L. ponticum (Sinop) by the chaetotaxy of the male sternite VII and by the completely different morphology of the aedeagus ( L. ponticum : ventral process of very distinctive shape, strongly asymmetric).

For illustrations and measurements of the compared species see ASSING (2005, 2009).

E t y m o l o g y: The specific epithet is derived from the name of the mountain range where the species was discovered.

D i s t r i b u t i o n a n d b i o n o m i c s: The type locality is situated in the western parts of the Ilgaz Da÷ları (northern Anatolia: Çankırı, near the border with Kastamonu). The type specimens were found under stones below a snow field at an altitude of 1560 m.

Acknowledgements

I am indebted to the colleagues indicated in the material section for the loan of material. In particular, I am grateful to Alexey Shavrin for the generous gift of the holotype of L. shavrini . Benedikt Feldmann proof-read the manuscript.

Zusammenfassung

Leptobium shavrini nov.sp. ( Spanien: Andalusien) and L. ilgazicum nov.sp. ( Türkei: Çankırı) werden beschrieben, abgebildet und mit ähnlichen, in Spanien bzw. der Türkei verbreiteten Arten verglichen. Von zwei Arten werden weitere Nachweise gemeldet. Die Gattung umfasst nunmehr insgesamt 67 Arten und zwei Unterarten.

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References

ASSING V. (2005): A revision of the genus Leptobium CASEY (Coleoptera: Staphylinidae: Paederinae). — Stuttgarter Beiträge zur Naturkunde, Serie A (Biologie), Nr. 673: 1-182.

ASSING V. (2009): A revision of Leptobium CASEY. IV. Three new species and additional records (Coleoptera: Staphylinidae: Paederinae). — Stuttgarter Beiträge zur Naturkunde Serie A, Neue Serie 2: 227-236.

ASSING V. (2010): A revision of Leptobium CASEY. VI. A revalidation, a new synonymy, and additional records (Coleoptera: Staphylinidae: Paederinae). — Linzer biologische Beiträge 42 (1): 489-498.

Author´s address: Dr. Volker ASSING

Gabelsbergerstr. 2

D-30163 Hannover, Germany

E-mail: [e-mail]

Figures

Figs 8-14: Leptobium ilgazicum nov.sp.: (8) habitus; (9) forebody; (10) head in lateral view; (11) male sternite VII; (12) male sternite VIII; (13-14) aedeagus in ventral and in lateral view. Scale bars: 8-10: 1.0 mm; 11-14: 0.5 mm.