Xotidium heissi Ogawa & Loebl

Ogawa, Ryo & Loebl, Ivan, 2016, A review of the genus Xotidium Loebl, 1992 (Coleoptera, Staphylinidae, Scaphidiinae), with descriptions of five new species, Deutsche Entomologische Zeitschrift 63 (1), pp. 155-169 : 158-161

Taxon classification Animalia Coleoptera Staphylinidae

Xotidium heissi Ogawa & Loebl sp. n. Figs 5a, 6i, 8a

Type material.

Holotype, 1♂, Brunei/Temburong, Kuala Belalong FSC, 60-300 m, 16-20. IV. 1993, mixed Dipterc. for., E. Heiss, MHNG ENTO 00008955 (MHNG).

Paratype, 1♂, SABAH: Porig Hot, Springs, 500 m, 6. V. 1987, Burckhardt - Löbl, MHNG ENTO 00008956 (MHNG).

Etymology.

This species epithet is named in honour of the collector of the holotype, E. Heiss from Innsbruck, Austria.

Description

(male). Dorsal and ventral surface almost reddish-brown (Fig. 5a). Antennae almost yellowish-brown, but antennomeres VI–XI blackish. Legs reddish-brown to brown; tarsi paler than tibiae and femora. Head, pronotum, and elytra sparsely and finely pubescent.

Head with eye width almost the same as interocular distance. Punctuation sparse and fine.

Pronotum wider than long. Punctuation sparse and fine, as on head. Scutellum almost as long as wide, with exposed apex.

Elytra almost as long as wide, widest at basal fourth, lateral margins sharply narrowed apically, minutely serrate at inner part of posterior margin. Punctuation fine and sparse as on pronotum. Sutural striae extending outwards along basal margin to form basal striae, reaching humeral area and joined with lateral striae.

Hypomeron and lateral portion of mesoventrite smooth. Lateral portion of metaventrite finely and sparsely punctate. Metanepisternum about four times as long as wide, without longitudinal line. Metepimeron almost as long as wide. Metacoxa about six times as wide as metacoxal process. Ventrite I sparsely and finely punctate.

Protarsomere V about 2.5 times as long as each I–IV. Mesotarsomere I about 2.5 times as long as each II–IV; V about twice as long as IV. Metatarsomere I about three times as long as each II–IV; V about 1.5 times as long as each II–IV.

Protarsomeres I–III possibly with tenent setae, but invisible at × 80 magnification, not enlarged. Aedeagus 0.54 mm long; parameres symmetrical, with strongly widened apical section longer than third of total parameral length; internal sac with a sinuate flagellar sclerite, basally widened and bent (Fig. 8a).

Female. Unknown.

Measurements

(n = 2). Length (PL+EL): 1.33-1.38 mm, PW: 0.73 mm, EW: 0.75-0.78 mm, HW: 0.33-0.35 mm, ID: 0.13 mm, PL/PW: 0.69-0.72, EL/EW: 1.10. Approximate ratio of each antennal segment in length (width) (n = 1): II 1.2 (0.4): III 1.0 (0.3): IV 1.4 (0.3): V 1.6 (0.3): VI 1.8 (0.2): VII 2.0 (0.3): VIII 1.8 (0.3): IX 2.1 (0.5): X 1.9 (0.5): XI 2.3 (0.5).

Distribution.

Brunei; East Malaysia: Sabah.

Remarks.

This species is very similar to Xotidium bolmarum Löbl in the reddish body and the body size, but may be easily distinguished by the strongly widened apical portion of parameres and the sinuate sclerite of male genitalia.