Lesteva (s. str.) hajeki Shavrin, 2014

Shavrin, Alexey V., 2014, Two new species and records of the genus Lesteva Latreille, 1797 (Coleoptera: Staphylinidae: Omaliinae) from southeastern China, Zootaxa 3821 (2), pp. 291-296 : 292-293

Lesteva (s. str.) hajeki Shavrin , sp. n.

( Figs. 1–2 )

Holotype: male: ‘ CHINA, JIANGXI prov., 24.iv.2011 | Jinggang Shan Mts. | Xiping (stream valley; cow dungs) | 26°33.7'N, 114°12.2'E | M. Fikáček & J. Hájek leg.’ ( NMPC).

Description. Measurements (in mm). WH: 0.65; LH: 0.50; LA: 1.80; LE: 0.25; LT: 0.15; LP: 0.89; WPmax: 0.72; WPmin: 0.57; LEl: 1.19; WE: 1.27; WA: 1.20; LAed: 0.57; TL: 3.42.

Head, elytra, protibia and abdominal sternites IV−V brown; ocelli, pronotum, apical margins of elytra and abdominal sternites VI−VIII red brown; antennes, mouthparts and legs yellow; each elytron with indistinct one yellow macula in anterior third. Pubescence of forebody decumbent, long, yellow; pubescence of abdomen short. Head 1.3 times as wide as long, with large prominent eyes; eyes 1.6 times longer than temples; ocelli moderately large; distance between ocelli approximately as the distance between ocellus and posterior margin of eye. Punctation deep, regular, coarse and sparser on vertex and on ocullar ridges; interstices between punctures as large as the diameter of one puncture, without microsculpture, glossy. Antennae long, reaching anterior third of elytra; measurements of antennomeres: I: 0.19 × 0.04; II: 0.16 × 0.035; III−V: 0.15 × 0.03; VI−VII: 0.17 × 0.03; VIII−IX: 0.16× 0.03; X: 0.13 × 0.035; XI: 0.21 × 0.037. Pronotum moderately convex and slightly transverse, approximately as long as head, widest near anterior third; without discal impressions, slightly flattened in posterior third. Punctation deeper and coarser than that on head, denser anteriorly; interstices between punctures as diameter of half or one puncture, without microsculpture, glossy. Scutellum triangular, with fine dense punctation, without microsculpture. Elytra 1.3 times longer than pronotum, moderately convex, posterior angles broadly rounded. Punctation finer than that on pronotum, punctures large and densely dustributed; interstices between punctures as the diameter of puncture, without microsculpture, glossy. Wings fully developed. Tarsomere I of metatarsus approximately as length as tarsomeres II−IV, as long as tarsomere V. Abdomen slightly narrower than elytra; abdominal tergites with very fine punctuation and visible isodiametric microsculpture; abdominal tergite V with paired tomentose spots.

Male. Sternite VIII with emarginate posterior margin. Aedeagus ( Fig. 1 ) moderately wide, apical part of median lobe rounded, curved dorsally; parameres slightly exceeding apex of aedeagus, with very wide apices, bends of parameres with small lateral portion folded ventrally. Aedeagus laterally as in Fig. 2 .

Female unknown.

Comparative notes. Based on the small size of the body and the shape of apex of the aedeagus, this new species is closely related to L. davidiana Rougemont, 2000 ( China: Sichuan province), but differ by the moderately lighter colorations, by the smaller yellow rounded macula on each elytron ( L. davidiana with subtriangular larger maculae), by the lighter pubescence, by the coarser punctation of the forebody and by the shorter and wider parameres without pubescence.

In addition it is readily separated from the congeners with round elytral spots ( L. aureomontis Rougemont, 2000 ( China: Sichuan province), L. brevimaculata Ma & Li, 2012 ( China: Zhejiang province), L. erythra Ma & Li, 2012 ( China: Zhejiang province), L. fikaceki Shavrin, 2013 (Jiangsi province), L. flavopunctata Rougemont, 2000 ( China: Zhejiang province, Hunan province, Jiangsi province), L. pulcherrima Rougemont, 2000 ( China: Jiangxi province, Zhejiang province) and L. rufopunctata Rougemont, 2000 ( China: Zhejiang province, Jiangsi province, Beijing province )) as follows:

From L. brevimaculata and L. flavopunctata by the longer body length and longer pronotum, by the lighter coloration, by the pronotum without visible impressions.

From L. aureomontis and L. rufopunctata by the smaller and narrower pronotum, by the lighter coloration, by the smaller round maculae on elytra more moved to the anterior third.

From L. erythra by the darker coloration, by the narrower pronotum and by the denser puncturation of the forebody.

From L. fikaceki by the narrower and insignificant smaller body, by the lighter coloration and by the pronotum without visible impressions.

From L. pulcherrima by the smaller and not parallel body, by the more transverse pronotum, by the coloration ( L. pulcherrima with brilliant metallic blue body, femora, tibiae and first antennomeres, with round orange macula near the middle of each elytron).

From all these species L. hajeki differs by the shape of aedeagus, parameres and internal structure of the endophallus.

For illustrations of the compared species see Ma & al. (2012), Ma & Li (2012), Rougemont (2000) and Shavrin (2013).

Etymology. The name of species is dedicated to my colleague Dr. J. Hájek (Prague, Czech Republic), specialist on water beetles and one of the collectors of the type material.

Remarks. The species was collected in the same type locality as L. fikaceki .

Figures

FIGURES 1–2. Lesteva hajeki sp.n.: 1−aedeagus, parameral view, 2−aedeagus, lateral view. Scale bar: 0.2 mm.