Uloma acrodonta, Liu, Shanshan & Ren, Guodong, 2016

Liu, Shanshan & Ren, Guodong, 2016, Two new species and one newly recorded species of Uloma Dejean, 1821 from Zhejiang, China (Coleoptera, Tenebrionidae, Ulomini), ZooKeys 607, pp. 103-118 : 107-111

Taxon classification Animalia Coleoptera Tenebrionidae

Uloma acrodonta sp. n. Figs 1 B–C, 3

Type material.

Holotype, ♂, labelled "19 July 2012; China, Zhejiang, Longquan County, Mt. Fengyangshan; X. Wang and J. Jiao lgt.; the Museum of Hebei University" (white, rectangular, printed, in Chinese). Paratypes, 1♂1♀, labelled as holotype. All types have additional label "Holotype (and Paratype, respectively), Uloma acrodonta sp. n. Liu & Ren det. 2015" [red (and Paratype with yellow, respectively), rectangular, printed and handwritten], and all of them are deposited in MHBU.

Diagnosis.

The new species is characterized by the following: clypeus slightly elevated with two small ridges; antennomeres 5 and 7 obviously sharply protruding at inner border; pronotum with a small and shallow anterior impression; protibia broader, with 8-9 sharp large denticulations at apical 2/3 of outer edge; last ventrite with a shallow impression.

Description.

Male (Fig. 1B). Head nearly hexagonal, with dense small punctures in apical half, and with dense large punctures in basal half. Labrum trapezoidal, sparsely punctate, scattered with long yellow hairs. Clypeus densely and finely punctate, anterior margin weakly emarginate, slightly elevated with two small ridges. Frontoclypeal suture deeply impressed. Genae slightly convex and extended, temples reduced. Eyes transverse, with at least 2-3 facets at narrowest point in lateral view; distance between eyes approximately 3.5 times longer than their diameter. Frons convex but slightly depressed on centre, with large coarse punctures. Mentum (Fig. 3B) cordate, truncate basally, weakly emarginate at anterior margin, flat with fine transverse wrinkles in middle, with a pair of crescent-shaped hairy patches on external sides. Ligula (Fig. 3B) deeply emarginate anteriorly, depressed in middle with sparse long hairs. Terminal maxillary palpomere knife-shaped. Antennae (Fig. 3A) long, reaching to the middle of pronotum; antennomere 1 thick, 2 very short and subquadrate, 3 slender, 4 short, 5-10 gradually widening, forming a more or less distinct club, 11 semi-spherical; 5, 7 obviously sharply protruding at inner border; ratio of the length (and the width) of antennomeres 2-11 as follows: 8.5 (9): 18 (12.5): 12 (12.5): 11 (16.5): 11 (16): 11 (20.5): 11 (18): 10.5 (18): 10.5 (18): 15 (17.5).

Pronotum (Fig. 3C) slightly transverse, subquadrate, nearly 1.2 times as wide as long, widest at middle, with sparse small punctures widely spaced on centre and be coming denser toward sides. Pronotum with a small and extremely shallow anterior impression without protuberances. Anterior margin emarginate with narrow border only at both apices, without border in the middle 1/3, and with dense short hair fringes. Lateral margins arcuate, strongly narrowing forward and less so from widest point to base, with broad border. Basal margin slightly convex. Anterior angles sharp, posterior angles rectangular. Prosternum with sparse and large punctures, posternal process (Fig. 3D) rounded in lateral view, smoothly descended at apex, with coarse transverse wrinkles and two rows of short yellow hairs on centre. Propleuron with long wrinkles and large punctures. Metasternum very short.

Scutellum subtriangular, with sparse and small punctures. Elytra nearly parallel–sided; elytra distinctly punctato–striate, punctures of elytral rows small and only somewhat broader than stripes; intervals slightly convex, distinctly and sparsely punctate with several transverse wrinkles, lateral margins visible only at humeri in dorsal view. Hind wing (Fig. 3I) vestigial, narrow, and short.

Protibia (Fig. 3E) with two equal apical spurs; nearly straight, narrow at base, then feebly and gradually explanate on both inner and outer edges; inner edge weakly emarginate at base, distinctly protruding to inner apex, fringed with yellow short hairs becoming denser and longer toward apex; outer edge with 8-9 sharp denticulations at apical 2/3 scattered with short hairs; dorsal surface with a long depression near apex and large sparse and not confluent punctures; ventral surface with a row of several small sharp protuberances and short sparse hairs. Mesotibia feebly and gradually expanding toward apex, outer edge with small denticles and sparse short hairs. Metatibia (Fig. 3G) slightly curved, feebly and gradually expanding toward apex, outer edge smooth without denticles and hairs. Length ratios of metatarsomeres (Fig. 3F) 1 to 4 as follows: 46: 10: 9.5: 32.

Abdominal ventrites finely and densely punctate, punctuation larger and subcontiguous towards lateral portions; last ventrite (Fig. 3H) with a very shallow impression.

Aedeagus (Fig. 3 J–K) with basale parallel–sided; apicale broad at base, then gradually feebly narrowing towards apex, subparallel–sided near apical, truncate and semi-circularly depressed at apex in dorsal view, with a longitudinal depression on centre in ventral view, slightly curved in lateral view.

Female (Fig. 1C). Mentum subcordate, with V-shaped convex on centre, without hair. Clypeus without ridges. Antennomere not protruding to inner border. Pronotum without anterior impression. Protibia with shape similar to that of male, inner edge not protruding to inner apex. Metatibia straight. Last ventrite without impression.

Body length: 12.5-13.0 mm; elytral width at widest point: 4.5 mm.

Etymology.

The species epithet refers to the sharply protruding at inner border of antennomere 5 and 7.

Remarks.

The new species is most similar to Uloma quadratithoraca Liu & Ren, 2008, but can be distinguished from the latter by the following characters: (1) male clypeus slightly elevated with two small ridges in the new species (without ridge in Uloma quadratithoraca ); (2) male antennae long, reaching to the middle of pronotum, antennomeres 5 and 7 obviously sharply protruding at inner border in the new species (5 and 7 not protruding in Uloma quadratithoraca ); (3) male pronotum with a small and shallow anterior impression in the new species (without anterior impression in Uloma quadratithoraca ); (4) male protibia distinctly broader, with 8-9 sharp large denticu lations at apical 2/3 of outer edge in the new species (narrower, with 8-9 undulant denticulations at apical 1/2 in Uloma quadratithoraca ); (5) male last ventrite with a shallow impression in the new species (without impression in Uloma quadratithoraca ).

Moreover, five additional species ( Uloma intriconicula Liu, Ren & Wang, 2007, Uloma metogana Ren & Yin, 2004, Uloma takagii Masumoto & Nishikawa, 1986, Uloma rubripes rubripes (Hope, 1831) and Uloma rubripes minor Gebien, 1914) are known to occur in China and its surrounding areas with antennomere 5 and 7 obviously sharply protruding at inner border. The new species is easily distinguished from them based on shape differences in the male pronotum, pronotal anterior impression, protibia, metatibia, ridges of clypeus, and whether or not the pronotal anterior impression exists in female.