Zyras (Zyras) flavorufus CAMERON, 1939

Assing, Volker, 2017, On Zyras sensu strictu in the East Palaearctic and Oriental regions III, with a focus on the Southeast of Continental Asia and the Sunda Islands (Coleoptera: Staphylinidae: Aleocharinae: Lomechusini), Beiträge Zur Entomologie = Contributions to Entomology 67 (2), pp. 213-246 : 234-235

Zyras (Zyras) flavorufus CAMERON, 1939

( Figs 8 , 27 , 42 , 73–75 )

Zyras (Zyras) flavorufus CAMERON, 1939b: 18 .

Type material examined: Lectotype ♂, present designation: “ F. C. Drescher, G. Tangkoeban Prahoe, 4000–5000 Voet, Preanger , Java, IX.1933 / Z. flavorufus Cam. / Syntype / M. Cameron. Bequest. B.M. 1955-147 / Lectotypus ♂ Zyras flavorufus Cameron , desig. V. Assing 2017” ( BMNH).

Comment: The original description is based on an unspecified number of syntypes from “G. Tangkoeban Prahoe ... 20.VII.30” ( CAMERON 1939b). The date indicated on the label of the sole specimen found in the Cameron collection differs from that indicated in the description, but it can be assumed that it is one of the specimens that CAMERON (1939b) based his description on and that it has type status (identification label with Cameron´s handwriting; collection date six years prior to publication year; characters matching original description). The specimen is designated as the lectotype.

Redescription: Body length 6.7 mm; length of forebody 3.1 mm. Coloration ( Figs 8 , 27 , 42 ): body reddish with the head and the postero-lateral portions slightly darker; legs dark-yellowish; antennae dark-brown with the basal three antennomeres reddish; maxillary palpi reddish with the apical palpomere yellowish-red.

Head ( Fig. 27 ) moderately transverse; punctation moderately dense and moderately coarse; median dorsal portion extensively impunctate. Eyes moderately large, slightly longer than postocular region in dorsal view. Antenna ( Fig. 8 ) 2.1 mm long and rather slender; antennomeres IV indistinctly oblong, V as long as broad, VI–X increasingly transverse and of gradually increasing width, X less than 1.5 times as broad as long, and XI of conical shape, shorter than the combined length of IX and X.

Pronotum ( Fig. 27 ) 1.11 times as broad as long and 1.21 times as broad as head, broadest in anterior half; posterior angles marked; lateral margins distinctly sinuate in posterior half in dorsal view; punctation moderately coarse, rather dense, and slightly irregularly distributed.

Elytra ( Fig. 27 ) 0.94 times as long as pronotum; punctation moderately dense and moderately coarse, nearly regularly distributed; pubescence dense, not particularly long, and sub-depressed. Hind wings present. Metatarsomere I shorter than the combined length of II–IV.

Abdomen ( Fig. 42 ) narrower than elytra, with moderately deep anterior impressions on tergites III–V; tergites III–V each with a transverse row of fine, sparse, and weakly defined puncture-like impressions in anterior impressions, with few lateral setiferous punctures on either side, and minute setiferous punctures at posterior margin, disc with scattered micropunctation; tergite VI with a broad transverse band of fine nonsetiferous punctures in anterior portion, with scattered micropunctation on disc, with few lateral setiferous punctures bearing long dark setae on either side and with numerous fine setiferous punctures near posterior margin; tergite VII with a broad band of fine non-setiferous punctation in anterior portion, with non-setiferous micropunctation and larger punctures on remainder of disc, with some lateral setiferous punctures bearing long dark setae on either side, and with fine setiferous punctures near posterior margin, posterior margin with palisade fringe; tergite VIII with numerous setiferous punctures in posterior half, posterior margin convex.

♂: sternite VIII with strongly convex posterior margin; median lobe of aedeagus 0.83 mm long and shaped as in Figs 73–74 ; paramere 0.75 mm ( Fig. 75 ) long and with very short apical lobe.

♀: unknown.

Comparative notes: Based on the very short apical lobe of the paramere, on the shapes of the ventral process and of the internal structures of the aedeagus, and on the punctation pattern of the abdomen, Z. flavorufus belongs to the Z. hirtus group. It is distinguished from most species of this group by the shorter and less dense pubescence of the forebody and of the abdomen. In habitus, coloration, and other external characters, Z. flavorufus is highly similar to Z. matangensis CAMERON, 1943 and Z. parahirtus ASSING, 2017 , both from Borneo. It is distinguished from these species by more distinctly sinuate lateral margins of the pronotum, somewhat more slender antennae with less transverse preapical antennomeres, longer elytra with more distinct punctation, finer and sparser non-setiferous punctation on tergites VI and VII, and by the shape of the median lobe of the aedeagus.

Distribution: This species has been recorded only from the type locality in Java.

3.3.2 Southeastern continental Asia

Figures

Figs 1–26: Antenna (1–18) and forebody (19–26) of Zyras spp. (1–17, 19–26) and Myrmedonota modiglianii (18): punctipennis, holotype (1, 19); facundus, lectotype (2, 24); latibasalis (3, 25); kinabaluensis, holotype (4, 21); matangensis, holotype (5, 26); bryanti, holotype (6, 23); granulipennis, holotype (7); flavorufus, lectotype (8); rutrilobatus (9); parvilobatus (10); hirtiventris (11–12; 11: holotype; 12 female paratype); hlavaci (13–14; 13 holotype; 14 paratype from Selangor); lunatus (15); elegantulus, lectotype (16, 20); pallipyga, holotype (17, 22). Scale bars: 1.0 mm.

Figs 27–39: Forebody (27–33), abdomen (34–38), and median portion of tergite VIII (39) of Zyras spp.: flavorufus, lectotype (27); parvilobatus (28); lunatus (29); granulipennis, holotype (30); rutrilobatus (31); hirtiventris (32); hlavaci, holotype (33); punctipennis, holotype (34); elegantulus, lectotype (35); facundus, lectotype (36); pallipyga, holotype (37); bryanti, holotype (38); latibasalis (39). Scale bars: 27–38: 1.0 mm; 39: 0.2 mm.

Figs 40–52: Abdomen (40–49, 52), abdominal tergite VI (50), and forebody (51) of Zyras spp. (40–50) and Myrmedonota modiglianii (51–52): latibasalis (40); matangensis, holotype (41); flavorufus, lectotype (42); parvilobatus (43); kinabaluensis, holotype (44); rutrilobatus (45); granulipennis, holotype (46); lunatus (47); hlavaci, holotype (48); hirtiventris, holotype (49–50). Scale bars:1.0 mm.

Figs 72–86: Zyras latibasalis (72), Z. flavorufus, lectotype (73–75), Z. wei from Laos (76–77), Z. notaticornis from Laos (78–80), and Z. rutrilobatus (81–86): paramere (72, 75, 80, 83); median lobe of aedeagus in lateral and in ventral view (73–74, 76–79, 81–82); male tergite VIII (84); male sternite VIII (85); postero-median portion of male sternite VIII (86). Scale bars: 84–85: 0.5 mm; 72–83: 0.2 mm; 86: 0.1 mm.