Xantholinus (Calolinus) ibex, Assing, Volker, 2007

Assing, Volker, 2007, On the Xantholinini of Turkey and adjacent regions (Coleoptera: Staphylinidae: Staphylininae), Zootaxa 1474, pp. 1-54 : 22-24

Xantholinus (Calolinus) ibex sp. n.

(Figs. 32–41, 58)

Type material. Holotype: ɗ, "Saklikent/Lykien ( TR), Skigebiet, leg. Esser, 18.3.0 2 / Holotypus ɗ Xantholinus ibex sp. n. det. V. Assing 2006" (cAss). Paratypes: 1ɗ, " TR. - Muġla; No. 10, 20 km NNE Fethiye, Nexp. oakwood, 970 m, 36°47'28N, 29°11'29E, 27.III.2002, P. Wunderle" (cWun); 1ɗ, " TR. - Muġla; No. 19, SE Fethiye, Baba Daġ, above Ovacik 1450 m, 36°31'59N, 29°11'26E, 30.III.2002, P. Wunderle" (cAss).

Description. Measurements (in mm) and ratios (range; n=3): AL: 2.14–2.20; HL: 1.39–1.56; HW: 1.12– 1.27; PW: 1.01–1.13; PL: 1.42–1.57; EL: 0.92–1.01; EW: 1.19–1.33; AW: 1.22–1.28; TiL: 0.83–0.92; TaL: 0.68–0.71; ML: 1.10–1.21; TL: 8.4–10.3; HL/HW: 1.23–1.24; PW/HW: 0.88–0.91; PL/PW: 1.39–1.43; EL/ PL: 0.64–0.67; EW/PW: 1.17–1.22; AW/EW: 0.97–1.03; TiL/TaL: 1.22–1.30.

FIGURES 32–41. Xantholinus ibex sp. n. (32–36, 39, 41: holotype; 37–38, 40: paratype): 32—habitus; 33—forebody; 34—head in lateral view; 35—antenna; 36–38—aedeagus in dorsal and in lateral view; 39–40—distal internal structures of aedeagus; 41—proximal internal structures of aedeagus. Scale bars: 32–35: 1.0 mm; 36–40: 0.5 mm; 41: 0.2 mm.

Habitus as in Fig. 32. Distinctly bicoloured species: head, pronotum, and abdomen (except for the reddish posterior margins of segments VII and VIII) blackish brown to black; elytra bright reddish; legs reddish; antennae reddish brown to dark brown.

Head distinctly oblong (see measurements and ratio HL/HW) and of somewhat variable shape, weakly to moderately dilated posteriad; eyes moderately small (Fig. 34), weakly projecting from lateral outline of head, little more than 1/4 the length of postocular region in dorsal view; dorsal surface with well-defined sparse puncturation; microsculpture absent (Fig. 33). Antenna with antennomeres V–X more than 1.5 times as wide as long (Fig. 35).

Pronotum slightly narrower than head (see ratio PW/HW), distinctly tapering posteriad; lateral margins almost straight in dorsal view; dorsal series somewhat irregular, composed of 9–15 punctures; microsculpture absent (Fig. 33).

Elytra distinctly shorter and somewhat wider than pronotum (see ratios EL/PL and EW/PW); puncturation well-defined, interstices on average slightly wider than diameter of punctures (Fig. 33). Hind wings of reduced length, approximately twice as long as elytra.

Abdomen approximately as wide as elytra, widest at segments VI/VII; puncturation fine and well-defined; all tergites with shallow, but distinct transverse microsculpture; posterior margin of tergite VII with narrow palisade fringe.

ɗ: posterior margin of tergite VIII truncate and narrowly semi-transparent; posterior margin of sternite VIII weakly convex and narrowly semi-transparent; aedeagus with distinctive internal structures: a distinctly bent (lateral view) tube with 2 almost contiguous series of numerous spines, the left series with more numerous and shorter spines, and the right series with less numerous and very long slender spines; distally with a short series of 6–8 stout and distinctly sclerorited spines and with a cluster of approximately 6 very long and slender semitransparent spine-like structures (Figs. 36–41).

Comparative notes. This species is reliably distinguished from similar bicoloured Calolinus species occurring in Turkey ( X. rufipennis , X. puthzi , and the two following species) by the shape and the internal structures of the aedeagus. From X. rufipennis and X. puthzi , it is additionally separated by the shorter elytra and the reduced length of the hind wings. For additional characters distinguishing X. ibex from the two following species see the comparative notes in the respective sections below.

Etymology. The name (Lat., noun in apposition) refers to the shape of the internal structures of the aedeagus, which in lateral view somewhat resemble the horn of an ibex .

Distribution and bionomics. The distribution of X. ibex is apparently confined to Muġla and western Antalya in southwestern Anatolia ( Fig. 58 ). The two type specimens from Muġla were sifted from the leaf litter in an oak forest and below scattered deciduous trees and shrubs at altitudes of 970 and 1450 m.

Figures

FIGURE 58. Distributions of Xantholinus ibex sp. n. (filled circles), X. penicillatus sp. n. (open circles), X. puthzi Bordoni (open square), and X. marasicus sp. n. (filled square) in Turkey.