Redescription and new records of Ulomimus indicus Bates, 1873 (Coleoptera, Tenebrionidae, Tenebrioninae)

Abstract Ulomimus indicus Bates, 1873 of the tribe Ulomini is recorded for the first time from China (Guangxi and Hainan), Indonesia (Sumatra) and Thailand (Chiang Dao). A redescription of the male and the first description of the female are also provided.


Introduction
Ulomimus indicus and the monotypic genus Ulomimus were described by Bates (1873) from "East India". The species was later mentioned to occur in Sri Lanka (Kaszab 1979) and in Vietnam (Kaszab 1980, Merkl 1992. Ulomimus is a member of the tribe Ulomini. This tribe is characterized by the presence of placoid sensoria on the antennae, the primitive ("lagrioid") type of labrum and the exposed posterior part of the 7 th abdominal tergite (Matthews and Bouchard 2008). The tribe includes about 40 genera and an estimated 400 described species. It is fairly speciose in the Old and New World tropics, but very few species extend into the Nearctic ecozone (Aalbu et al. 2002) and into the Euro-Siberian region of the Palaearctic ecozone (Löbl et al. 2008). More than half of the known species have been described from the Indomalaya ecozone (Oriental Realm), where Sundaland is the richest in species. However, the overwhelming majority of the described species belong to the genus Uloma Dejean, 1821.
Ulomimus is very similar and closely related to the Oriental genus Cneocnemis Gebien, 1914. In Ulomimus the antennomere 6 is transverse and bears one placoid sensorium (antennomere 6 is subequal in length and width and without placoid sensorium in Cneocnemis), the pronotum is widest in anterior 1/3 (widest at base in Cneocnemis), and apicale of aedeagus with small oblique lateral notch (without notch in Cneocnemis).
These two genera are similar to the widely distributed genus Uloma. The antennomeres 5 to 10 of Uloma are strongly transverse, forming a more or less distinct club, and have several placoid sensoria on their distal edge, which are arranged in complete rings on antennomeres 7 to 10. Antennae of Cneocnemis and Ulomimus are more elongate, only the antennomeres 6 or 7 to 10 are transverse (much less than in Uloma), the placoid sensoria are fewer in number, and do not form complete rings. The pronotum of most Uloma species is sexually dimorphic -males have large anterior impression and low protuberances. The pronotum of the males and females are the same in Cneocnemis and Ulomimus.
In the present paper, the distribution range of the species is revised through the inclusion of new records from China, Indonesia and Thailand. A redescription of the male and a description of the female (including diagnostic features) are also provided.

Type species. Ulomimus indicus Bates, 1873.
Diagnosis. Antennae short, antennomeres 6 to 10 gradually widened, 11 large, nearly globose. Pronotum with narrow and complete basal bead. Protarsi dilated with a brush of dense short hairs beneath, and protarsomere 4 much smaller than 2 and 3. Protibia strongly triangularly widened near apex, with large tooth on ventral surface. Aedeagus linearly truncate at apex in dorsal view, parameres with a small notch behind each apical corner.
Remarks. The original spelling of the generic name is Ulomimimus. Rye (1873) mentioned the name as Ulomi[mi]mus, which is regarded as unjustified emendation. Neave (1940b) considered Ulomimus as an "err. Pro Ulomimimus Bates, 1873". However, all other authors used Ulomimus, so Ulomimus should be an unjustified emendation by Rye (1873) in prevailing usage, which is according to the Art. 33.2.3.1 of the ICZN (1999) is deemed a justified emendation.
It is unknow for the authors of the present paper who synonymised Pseuduloma with Ulomimus. Carter (1926) mentioned Pseuduloma as a distinct genus, when transferred Alphitobius torridus Carter, 1911(now belonging to Scotoderus Perroud, 1864, see Matthews and Bouchard 2008 to this genus. Neave (1940a) also considered Pseuduloma as a valid genus. However, Gebien (1940)  Original description. "Oblong, sub-parallel, moderately convex; brownish-black, shining, the mentum, antenna, palpi, tarsi, labrum, and margins of epistoma ferruginous, the legs chestnut-red; head coarsely and closely reticulate-punctate; prothorax punctured-sparsely on the disc-the punctures large, deep, rounded, and partly filled in with an apparent exudation of an ashy tint; scutellum smooth; elytra with nine (including the extreme marginal one) fine but deep striae, and a short scutellar one, the striae punctured (the punctures being much wider than the striae, the elytra appear crenulate-striate), the 4 th and 5 th striae shortest and united at some distance from the apex; intervals convex posteriorly, very minutely and sparsely punctured; pro-and mesosterna, flanks of pro-and mesothorax, and base of epipleural fold, strongly and closely punctured; metasternum, abdomen, and femora sparingly punctured, abdominal joints rugulose at the base. Long. corp. 4 lin.
Scutellum triangular, impunctate. Elytra distinctly punctato-striate, intervals weakly convex, very finely and sparsely punctate, lateral margins visible only at humeri in dorsal view. Epipleura sparsely and coarsely punctate in basal 1/3. Protibia (Figs 6-7) with two equal apical spurs; narrow at base, then explanate on both inner and outer edges, outer edge forming blunt subapical angulation, inner edge slightly concave at middle; outer edge without denticulation; inner edge fringed with yellow hairs becoming denser and longer toward apex; dorsal surface with low and blunt longitudinal keel and with fine and sparse punctures; ventral surface with sharp longitudinal keel and sharp tooth at middle (Fig. 7), ventral surface with a few coarse punctures and short, sparse, thick hairs. Protarsomeres 2 to 4 dilated, with long, sparse yellow dorsal hairs and dense, yellow ventral hair pads. Mesotibia and metatibia gradually dilated toward apex, outer edge with small denticles and sparse, long hairs. Length ratio of metatarsomeres 1 to 4 (Fig. 8) as follows: 10: 3: 3: 7. Abdominal ventrites finely and sparsely punctate, punctuation denser and subcontiguous toward lateral portions; last ventrite with deep apical groove.
Aedeagus (Figs 9-11) with basale parallel-sided; apicale broad at base, constricted at middle, widening and truncate at apex in dorsal view, with longitudinal depression in ventral view, slightly curved in lateral view; with small oblique notch at posterior corners of widened apical part. Female (Fig. 2). Mentum cordate, without dense pad of pubescence, but with sparse hairs and coarse wrinkles. Protibia with shape similar to or narrower than that of male, ventral surface concave, without keel and large tooth. Protarsomeres 2 to 4 not dilated and without ventral hair pads. Ovipositor (Figs 12-13) with coxites relatively smooth, bearing long sensorial hairs and a few short hairs at base. Distribution. "East India" (Bates 1873); Sri Lanka (Kaszab 1979); Vietnam (Fairmaire 1893, Kaszab 1980, Merkl 1992; Thailand, Indonesia/Sumatra, China/ Guangxi and Hainan Provinces (new records).