Xantholinus (Helicophallus) chersonesicus, Assing, Volker, 2007

Assing, Volker, 2007, On the Xantholinini of Turkey and adjacent regions (Coleoptera: Staphylinidae: Staphylininae), Zootaxa 1474, pp. 1-54 : 38-40

Xantholinus (Helicophallus) chersonesicus sp. n.

( Figs. 94–97 , 108 )

Type material. Holotype: ɗ, "Gallipoli / G. C. Champion Coll. B.M. 1927–409 / Holotypus ɗ Xantholinus chersonesicus sp. n. det. V. Assing 2007 " ( BMNH). Paratypes: 2ɗɗ, same data as holotype ( BMNH, cAss).

Description. Measurements (in mm) and ratios (range; n=3): AL: 1.98–2.04; HL: 1.30–1.34; HW: 1.09– 1.22; PW: 1.01–1.03; PL: 1.39–1.43; EL: 0.83–0.91; EW: 1.18–1.21; AW: 1.21–1.25; TiL: 0.77–0.79; TaL: 0.60–0.63; ML: 1.43; TL: 8.2–8.6; HL/HW: 1.16–1.21; PW/HW: 0.91–0.93; PL/PW: 1.35–1.41; EL/PL: 0.59–0.65; EW/PW: 1.16–1.18; AW/EW: 1.03–1.04; TiL/TaL: 1.24–1.28.

Coloration: head dark brown to blackish; pronotum and elytra yellowish red to bright reddish; abdomen reddish brown to brown; legs rufous; antennae reddish to brown.

Head strongly oblong (see measurements and ratio HL/HW), weakly dilated posteriorly; lateral margins weakly convex in dorsal view ( Fig. 94 ); eyes moderately small, not distinctly projecting from lateral outline of head, 1/4–1/5 the length of postocular region in dorsal view; dorsal surface with sparse, well-defined, and moderately fine puncturation, median dorsal area almost without punctures; shallow traces of microsculpture present only in posterior and postero-lateral areas of head. Antenna with preapical antennomeres weakly transverse, at most 1.5 times as wide as long.

Pronotum distinctly narrower than head (see ratio PW/HW), distinctly tapering posteriad; lateral margins almost straight in dorsal view; dorsal series composed of 11–13 punctures; microsculpture absent ( Fig. 94 ).

Elytra somewhat wider than pronotum and of variable length, at suture distinctly shorter than pronotum (see ratios EL/PL and EW/PW), moderately dilated posteriad ( Fig. 94 ); puncturation rather coarse, moderately dense, and well-defined. Hind wings reduced.

Abdomen approximately as wide as elytra, widest at segments VI/VII; puncturation fine and sparse; all tergites with shallow transverse microsculpture; posterior margin of tergite VII without palisade fringe.

ɗ: posterior margins of tergite and sternite VIII weakly convex and narrowly semitransparent; aedeagus with internal structures composed of two long proximal series, one of them with numerous (> 30) long and slender spines and the other with approximately 15 long and 20 short wide-based spines, a distal series of approximately 15 long and slender spines, a second distal series of approximately 15 shorter slender spines, and a distal brush-like cluster of long and weakly sclerotised spines ( Figs. 95–97 ).

Comparative notes. Among the Turkish representatives of the subgenus Helicophallus , the new species is characterised by the internal structures of the aedeagus, especially by the two long proximal series of sclerotised spines.

Etymology. The name (Lat., adj.) is derived from Chersones, the ancient name of Gelibolu, the peninsula where the type locality is situated.

Distribution and bionomics. The type locality is situated on the Gelibolu peninsula, Çanakkale, northwestern Turkey ( Fig. 108 ). Additional bionomic data are not available.

Figures

FIGURE 108. Distributions of Xantholinus chersonesicus sp. n. (open circle) and Megalinus scutellaris (Fauvel) (filled circles) in Turkey and Rhodos (Greece), based on examined records.

FIGURES 94 – 100. Xantholinus chersonesicus sp. n. (94 – 97), X. reitteri Coiffait, holotype (98), and Vulda ottomana (Cameron), holotype (99 – 100): 94, 99 — forebody; 95, 98, 100 — aedeagus; 96 — internal structures of aedeagus in squeeze preparation; 97 — distal part of internal structures of aedeagus in squeeze preparation. Scale bars: 94, 99: 1.0 mm; 95 – 98: 0.5 mm; 100: 0.2 mm.