Zyras (Zyras) shavrini, Assing, 2019

Assing, Volker, 2019, On the Lomechusini fauna of the Palaearctic and Oriental regions. XXVI. New species, a new synonymy, and additional records (Coleoptera: Staphylinidae: Aleocharinae), Beiträge Zur Entomologie = Contributions to Entomology 69 (1), pp. 33-70 : 67-68

Zyras (Zyras) shavrini spec. nov.

urn:lsid:zoobank.org:act:A7C7B14F-AA8A-47EB-AA6F-F7A7C2B040A4

(Figs 75–78, 163–165)

Type material: Holotype [slightly teneral]: “ PHILIP- PINES: Mindanao, Barangay Baganihan, Marilog D., Eagles Ridge, 7°45'N, 125°23'E, secondary forest, wet litter sifted, 26–28.III.2018, leg. Shavrin / Holotypus Zyras shavrini sp. n., det. V. Assing 2018” (cAss).

Etymology: This species is dedicated to Alexey Shavrin (Daugavpils), specialist of Omaliinae (Staphylinidae) , who collected the holotype.

Description: Rather larger species: body length 8.2 mm; length of forebody 3.7 mm. Habitus as in Fig. 75. Coloration: body pale-reddish, except for the slightly infuscate median portion of tergite VI; legs yellow; antennae with antennomeres I–II reddish, III–IV brown, V yellowishbrown, and VI–XI pale–yellowish; maxillary palpi pale-reddish.

Head (Fig. 76) 1.22 times as broad as long; punctation moderately coarse and dense, median portion impunctate. Eyes large, approximately twice as long as postocular region in dorsal view. Antenna (Fig. 77) 2.5 mm long; antennomere IV weakly transverse; antennomeres V–X transverse, of gradually increasing width, and increasingly transverse, X slightly less than twice as broad as long, and XI of conical shape, shorter than the combined length of IX and X.

Pronotum (Fig. 76) approximately 1.1 times as broad as long and 1.2 times as broad as head, broadest near anterior angles, weakly convex in cross-section; lateral margins very weakly sinuate in posterior two-thirds in dorsal view; posterior angles obtusely marked; punctation relatively fine and very dense; impunctate median band narrow; pubescence long, black, and suberect; near lateral and anterior margins with numerous long black and erect setae.

Elytra (Fig. 76) 0.8 times as long as pronotum; punctation rather fine and very dense; pubescence long, black, and suberect. Hind wings fully developed. Legs moderately long and slender; metatarsomere I nearly as long as the combined length of II–IV.

Abdomen (Fig. 78) broad, slightly narrower than elytra, and somewhat wedge-shaped; with rather deep anterior impressions on tergites III–V; all sternites and paratergites with long, dense, and suberect to erect pubescence; anterior impressions of tergites III–V each with a transverse row of non-setiferous punctures, with two transverse series of setiferous punctures in posterior portion, and with scattered micropunctation; tergite VI with a transverse band of dense non-setiferous punctures anteriorly, with sparse non-setiferous punctures across the middle, and with setiferous punctures near posterior margin and postero-laterally; tergite VII with a broad transverse band of dense non-setiferous punctures anteriorly and with setiferous punctures in posterior half, this setiferous punctation much denser in postero-lateral portions than in the middle, posterior margin with palisade fringe; tergite VIII with rather dense setiferous punctation in posterior half, posterior margin broadly convex.

: posterior margin convex, in the middle nearly truncate; median lobe of aedeagus approximately 0.9 mm long and shaped as in Figs 163–164 , ventral process apically long and acute; paramere ( Fig. 165 ) 1.05 mm long and with short apical lobe.

: unknown.

Comparative notes: As can be inferred from the long and dense pubescence of the whole body, the morphology of the antennae (antennomere XI short and of conical shape), the robust habitus with a broad and wedge-shaped abdomen, the long and dense pale pubescence of the abdomen, and the morphology of the aedeagus (shape of the ventral process; apical lobe of the paramere very short), Z. shavrini belongs to the Z. hirtus group. The new species is distinguished from other similarly coloured species of this group by the shape of the median lobe of the aedeagus (particularly the long and acute apex of the ventral process), by the conspicuously dense punctation of the forebody, and additionally as follows:

from Z. hirtus (KRAATZ, 1859) (South India, Sri Lanka) by slightly larger size, the coloration of the antennae, and the blackish pubescence of the forebody;

from Z. titan ASSING, 2017 (Sulawesi; largest species of the subgenus), by smaller size, the coloration of the antennae, a more transverse pronotum, blackish pubescence of the forebody, shorter and less slender legs, by the punctation pattern of the abdomen ( Z. titan : setiferous punctures much sparser), and by the shape of the male tergite VIII;

from Z. matangensis CAMERON, 1943 (Borneo) by larger size, the coloration of the antennae, a more transverse pronotum, and a broader, more distinctly wedge-shaped abdomen with denser setiferous punctation, and with distinct non-setiferous punctation in the anterior impressions of tergite III–V (absent in Z. matangensis );

from Z. lunatus ASSING, 2017 (Peninsular Malaysia) by a larger and more robust body, the coloration of the antennae, a more transverse pronotum, and an abdomen with distinct non-setiferous punctation in the anterior impressions of tergites III–V, with coarser nonsetiferous punctation on the remaining tergites, and with denser setiferous punctation;

from Z. parahirtus ASSING, 2017 (Borneo) by paler coloration, a larger and more robust body, the coloration of the abdomen, a less convex (cross-section) and more transverse pronotum, the presence of non-setiferous punctation in the anterior impressions of tergites III–V (indistinct in Z. parahirtus ), and by denser setiferous punctation of the abdomen;

from Z. flavorufus CAMERON, 1939 by larger body size, the coloration of the antennae, a less convex pronotum (cross-section), and an abdomen with distinct non-setiferous punctation in the anterior impressions of tergites III–V and with much denser setiferous punctation.

For illustrations and detailed descriptions of Z. hirtus , Z. titan , Z. matangensis , Z. lunatus , Z. parahirtus , and Z. flavorufus see ASSING (2016a, 2017b, c).

Distribution: The type locality is situated in Central Mindanao, South Philippines. The slightly teneral holotype was sifted from wet litter near small rocks in a secondary broad-leaved forest.

Figures

Figs 145–165:Drusilla spiniventris(145–147), D. breviuter(148–152), Pheidologitonetes biplicatus (153–154), Zyras conlectus (155– 157), Z. hetzeli (158–159), Z. reductus(160–162), andZ. shavrini(163–165): male tergite VIII (145, 148); median lobe of aedeagus in lateral and in ventral view (146–147, 149–150, 153–156, 158–161, 163–164); female tergite VIII (151); spermatheca (152); paramere (157, 162, 165). Scale bars: 145–151, 153–165: 0.2 mm; 152: 0.1 mm.