Leptobium yagmuri Anlaş, 2017

Anlaş, Sinan, 2017, A new species and new country records for the genus Leptobium Casey in the Palaearctic Region (Coleoptera: Staphylinidae: Paederinae), Zootaxa 4338 (1), pp. 173-181 : 178-180

Leptobium yagmuri Anlaş , sp. n.

( Figs. 1–6 )

Type material. Holotype: TURKEY: ♂, ‘‘TR. Ankara province, Elmadağ, Lalahan 10 km S, 39°54'46"N, 33°06'07"E, 1370 m, 29.III.2013, leg. Anlaş, Yağmur & Örgel / Holotypus ♂, Leptobium yagmuri Sp. n. det. S. Anlaş 2017” ( AZMM) . Paratypes: 3♂, 1♀, same data as holotype ( AZMM, NHMO) ; 1♂, 1♀, same data as holotype but 11.VII.2014 leg. Anlaş ( AZMM) ; 1♂, 1♀, same data as holotype but 29.VI.2016, leg. Örgel & Yaman ( AZMM).

DeSCription. Habitus as in Fig. 1 . Species of moderate size, 5.1–6.3 mm long. Coloration: head, pronotum and abdominal segments III–VI black, elytra reddish, with the anterior margin infuscate, abdominal segments VII–X reddish, but more than anterior half of abdominal segment VII black, antennae and legs reddish.

Head oblong ( Figs. 1–2 ), approximately 1.2 times as long as wide; eyes average size ( Fig. 2 ), approximately half the length of postocular region in dorsal view; puncturation moderately coarse and sparse, punctation in central dorsal region larger; interstices on dorsal surface on average 2–3 times as wide as punctures; antennae approximately 1.5 mm long; antennomere III only indistinctly longer than II; antennomeres IV–VI longer than the width, antennomeres VII–X about as wide as long; antennomere XI almost twice as long as wide ( Fig. 1 ).

Pronotum distinctly oblong and slightly wider than head ( Figs. 1–2 ), lateral margins subparallel in dorsal view; puncturation similar to that of head, but denser; microsculpture absent.

Elytra shorter than pronotum ( Figs. 1–2 ); puncturation well-defined, and denser than that of pronotum. Hind wings reduced. Tarsi relatively long, metatarsus shorter than metatibia ( Fig. 1 ).

Abdomen wider than elytra ( Fig. 1 ); puncturation fine and moderately dense; microsculpture shallow, composed of dense and fine transverse meshes and striae; posterior margin of tergite VII with indistinct rudiments of a palisade fringe.

♂: sternite VII with weakly modified pubescence, in posterior area without median impression, with very weakly modified setae ( Fig. 3 ); sternite VIII with posterior incision relatively short, not reaching middle of the sternite ( Fig. 4 ); aedeagus small, 1.4–1.5 mm long with asymmetric dorsal plate and distinct median carina dorsally, ventral process more or less asymmetrical ( Figs. 5–6 ).

Comparative noteS. The species is distinguished from all its congeners with a similar coloration and size by the morphology of the aedeagus. It is similar in external and sexual characters to L. assingi Bordoni and L. ilgazicum Assing. From these species, the new species is distinguished as follows:

From L. assingi it differs by the slightly smaller body ( L. yagmuri : 5.1–6.3 mm; L. assingi : 5.9–7.4 mm), longer antennae, slightly larger eyes, different coloration of elytra (in L. assingi : elytra uniformly rufous), by the male sternite VII with a pair of clusters with shorter and sparser modified setae ( L. assingi : male sternite VII with extensive cluster of stouter black setae), and by the differently shaped dorsal plate and ventral process of the aedeagus, especially by the broader and longer dorsal plate of the aedeagus ( L. yagmuri : Fig. 1–6 and L. assingi : Fig. 7 ).

MAP 1. Distribution of endemic Leptobium species in Anatolia: L. anlasi Assing (big filled circle); L. assingi Bordoni (small filled circles); L. bozdagense Assing (small open triangles); L. carinatum Assing (open hexagons); L. geminum Assing (small open circles); L. ilgazicum Assing (big open circle); L. mutabile Assing (small filled triangles); L. nabozhenkoi Anlaş (small filled square); L. ponticum Assing (big filled square); L. schuelkei Assing (big open square); L. wunderlei Bordoni (small open squares); L. yagmuri sp. n. (big open triangle).

From L. ilgazicum it differs by the smaller size ( L. yagmuri : 5.1–6.3 mm; L. ilgazicum : 6.6–7.2 mm), different coloration of elytra (in L. ilgazicum : elytra uniformly reddish), the more oblong head and by the male sternite VII with a pair of clusters with shorter and sparser modified setae ( L. ilgazicum : male sternite VII with extensive cluster of longer and stouter black setae), the relatively deeper posterior excision of the male sternite VIII. Additionally, the new species is distinct by the different shape of the ventral process and the dorsal plate of the aedeagus, especially by the dorsal plate with more pronounced median carina and also by the slightly more symmetric and apically more stout ventral process of the aedeagus ( L. yagmuri : Fig. 1–6 and L. ilgazicum : Fig. 8 ).

For more illustrations of L. assingi and L. ilgazicum see Assing (2005, 2010b).

Etymology. The species is dedicated to Ersen Aydın Yağmur (Manisa), a specialist on Scorpions, who collected some types of the new species.

DiStribution and bionomiCS. The species was collected only in Ankara province of central Anatolia. The type specimens were collected under stones in grassland and sifted from leaf litter at altitudes of about 1400 m.

Figures

FIGURES 1 – 8. Leptobium yagmuri sp. n. (1 – 6), L. assingi Bordoni (7) and L. ilgazicum (8). 1 — habitus; 2 — forebody; 3 — Male sternite VII; 4 — Male sternite VIII; 5, 6, 7, 8 — Aedeagus in lateral view (5) and ventral view (6 – 8). Scale bars: 1.0 mm (Fig. 1); 0.5 mm (Fig. 2); 0.2 mm (Fig. 3 – 8).