Lesteva fikaceki, Shavrin, Alexey V., 2013

Shavrin, Alexey V., 2013, New species and records of the genus Lesteva Latreille, 1797 (Coleoptera: Staphylinidae: Omaliinae) from Jiangxi province, China, Zootaxa 3681 (1), pp. 93-95 : 93-94

Lesteva (s.str.) fikaceki sp.n.

( Figs. 1 –3 )

Holotype: male: ‘ CHINA: Jiangxiprov. MF04 | Jinggangshan Mts., Xiping | 26°33.7'N, 114°12.2'E | 915 m, 24.iv.2011 | [M.] Fikáċek, [J.] Hájek, [F.-L.] Jia & [K.-Q.] Song’ ( NMPC).

Paratypes: 1 male, 1 female: same data as the holotype ( NMPC).

Description. Measurements (in mm; n=3). Maximum width of head including eyes: 0.62−0.66; length of head (from base of labrum to neck constriction along the head midline): 0.34; length of antenna: 1.50; longitudinal length of eye: 0.20; length of temple (from posterior margin of eye to neck constriction): 0.06; length of pronotum: 0.60−0.64; maximum width of pronotum: 0.66−0.7; minimum width of pronotum: 0.50−0.54; sutural length of elytra (from apex of scutellum to posterior margin of sutural angle): 1.12−1.24; maximum width of elytra: 1.22−1.26; width of abdominal segment IV: 1.12−1.22; length of aedeagus: 0.68; total length (from base of labrum to apex of abdomen): 2.60−3.50.

Habitus as in Fig. 1 . Head, pronotum, elytra, abdomen and legs black; ocelli, antennae and legs brown; mouthparts, base of antennal segments I −IX and tarsi yellow. Each elytron with one yellow spot in the middle. Pubescence of head, pronotum and elytra decumbent, long, white or yellow; pubescence of abdomen shorter, yellow. Head 1.8–1.9 as wide as long with large strongly prominent eyes; eyes thrice as long as temples; longitudinal furrows deep; ocelli large, distinct; distance between ocelli approximately as the distance between ocellus and posterior margiò of eye; punctation dense, deep and evenly distributed, sparser on vertex; interstices between punctures as large as the diameter of one or two punctures, without microsculpture, glossy. Antennae long, reaching 1/3 of elytra; measurements of antennomeres: I: 0.18 × 0.08; II: 0.12 × 0.06; III: 0.14 × 0.04; IV −VIII: 0.12 × 0.04; IX: 0.12 × 0.05; X: 0.12 × 0.06; XI 0.22 × 0.06. Pronotum cordate, slightly transverse, moderately convex, slightly wider than head, widest near anterior third; with two longitudinal and one median discal impressions; punctation denser and deeper than that on head; interstices between punctures without microsculpture, glossy. Scutellum triangular, with fine dense punctation. Elytra approximately twice as long as pronotum, relatively wide, convex, posterior angles broadly rounded; punctation finer than that on pronotum, punctures large and densely distributed; interstices between punctures without microsculpture, glossy. Wings fully developed. Tarsomere I of metatarsus much shorter than tarsomeres II–IV, approximately as long as tarsomere V. Abdomen broad, as wide as elytra, widest at tergite IV; abdominal tergites glossy, with fine punctures; tergites IV −V with paired tomentose patches.

Male. First four tarsomeres of protarsi weakly dilated. Sternite VIII with emarginate posterior margin. Aedeagus ( Fig. 2 ) relatively narrow, gradually tapering towards apex; parameres wide, slightly exceeding apex of aedeagus. Aedeagus laterally as in Fig. 3 .

Female. Tarsomeres of protarsi not dilated. Sternite VIII without emargination, straight apically.

Comparative notes. This new species is readily distinguished from the four previously described congeners with round elytral spots ( L. brevimaculata Ma & Li, 2012 ( China: Zhejiang Prov.), L. erythra Ma & Li, 2012 ( China: Zhejiang Prov.), L. flavopunctata Rougemont, 2000 ( China: Zhejiang Prov., Hunan Prov.) and L. rufopunctata Rougemont, 2000 ( China: Zhejiang Prov., Jiangsu Prov, Beijing Prov.)) particularly by the different morphology of the aedeagus. In addition, it is separated from them as follows: from L. rufopunctata and L. brevimaculata by much smaller and wider body, the lighter legs, the size of elytral spots (elytral spots of L. fikaceki sp.n. are larger than those of L. brevimacula and significantly smaller than those of L. rufopunctata ) and by the shape of the aedeagus (aedeagus of L. rufopunctata larger, parameres narrower; apex of aedeagus of L. brevimaculata wider); from L. flavopunctata by the spindle-shaped body ( L. flavopunctata with parallel-sided body) and by the length of parameres ( L. flavopunctata with parameres shorter than apex of aedeagus); from L. erythra by the darker coloration (elytra of L. erythra darkish brown with reddish suture and lateral margins, legs reddish-brown), by the wider aedeagus, by the shape and length of parameres (parameres of L. erythra slightly asymmetrical, as long as median lobe of the aedeagus).

For illustrations of the compared species see Rougemont (2000), Ma & al. (2012) and Ma & Li (2012).

Etymology. The species is dedicated to my colleague Dr. Martin Fikáċek (Prague, Czech Republic), specialist on Hydrophiloidea and one of the collectors of the type material.

Remarks. According to ecological data kindly provided to me by M. Fikáèek, specimens of the new species were collected during “..sifting sample of moist leaf litter accumulated at the bank of a stream ... in a bamboo bush”.

Figures

FIGURES 1 – 3. Lesteva fikaceki sp. n.: 1 − habitus, 2 − aedeagus, ventral view, 3 − aedeagus, lateral view. Scale bar: 1: 2.0 mm, 2 − 3: 0.2 mm.