Zyras (Zyras) titan, Assing, 2017

Assing, Volker, 2017, On Zyras sensu strictu in the East Palaearctic and Oriental regions, with a focus on the faunas of the Himalaya, India, Sri Lanka, Thailand, and Sulawesi (Coleoptera: Staphylinidae: Aleocharinae: Lomechusini), Beiträge Zur Entomologie = Contributions to Entomology 67 (1), pp. 117-192 : 161-164

publication ID	https://doi.org/ 10.21248/contrib.entomol.67.1.117-192
publication LSID	lsid:zoobank.org:pub:FD33C1AE-F7D9-4E3A-A053-A2CAA7261CFE
DOI	https://doi.org/10.5281/zenodo.5888440
persistent identifier	https://treatment.plazi.org/id/04E2A49E-E856-490E-AAB3-333A8F481D98
taxon LSID	lsid:zoobank.org:act:04E2A49E-E856-490E-AAB3-333A8F481D98
treatment provided by	Felipe
scientific name	Zyras (Zyras) titan
status	sp. nov.

Treatment

Zyras (Zyras) titan View in CoL spec. nov.

urn:lsid:zoobank.org:act:04E2A49E-E856-490E-AAB3-333A8F481D98

( Figs 41 View Figs 1–41 , 76 View Figs 68–81 , 113 View Figs 100–116 , 245–249 View Figs 245–259 )

Type material: Holotype ♂: “ INDONESIA: SULAWESI UTARA, Dumoga-Bone N.P. , 26 February 1985. / Plot A, ca 200 m, lowland forest / Flight interception trap 2 / R.Ent.Soc. Lond., Project Wallace, B.M. 1985-10 / 29.16 / Holotypus ♂ Zyras titan sp. n., det. V. Assing 2016” ( BMNH). Paratypes: 1 ♂: same data as holotype, but “ 24 February 1985.” (cAss); 2 ♀♀: same data as holotype, but “ April 1985.” ( BMNH) .

Etymology: The specific epithet (noun in apposition) alludes to the conspicuously large size of this species. Titans in Greek mythology are giants.

Description: Very large species; body length 9.5–11.0 mm; length of forebody 4.0– 4.3 mm. Coloration ( Figs 41 View Figs 1–41 , 76 View Figs 68–81 , 113 View Figs 100–116 ): head and pronotum reddish to reddish-brown, pronotum sometimes with paler lateral margins; elytra pale-reddish, occasionally with the lateral margins slightly darker; abdomen with tergites II–VI dark-reddish to brown with the posterior margin broadly pale-reddish, tergites VII–VIII reddish; antennae brown to dark-brown with the basal three antennomeres palereddish and the apical 2–3 antennomeres dark-yellowish; maxillary palpi reddish.

Head ( Fig. 76 View Figs 68–81 ) strongly transverse, extensively impunctate along middle; lateral dorsal portions with sparse and coarse punctation. Eyes large and bulging, more than twice as long as postocular region in dorsal view. Antenna ( Fig. 41 View Figs 1–41 ) 3.1–3.3 mm long; antennomeres IV weakly oblong, V weakly oblong or approximately as long as broad, VI approximately as broad as long or weakly transverse, VII–X of gradually increasing width and increasingly transverse, X approximately 1.5 times as broad as long, and XI as long as the combined length of VIII–X, or nearly so.

Pronotum ( Fig. 76 View Figs 68–81 ) rather weakly transverse, 1.07– 1.09 times as broad as long and approximately 1.27 times as broad as head, broadest in anterior half; lateral margins straight in posterior two-thirds (dorsal view); punctation coarse, dense, and somewhat irregularly distributed; laterally with impunctate patches; midline moderately broadly impunctate; lateral margins each with approximately eight stout, long, and erect black setae; anterior and posterior margins, too, with stout, long, and erect black setae; pubescence of disc pale, fine, moderately long, and sub-erect.

Elytra ( Fig. 76 View Figs 68–81 ) approximately 0.8 times as long as pronotum; punctation dense, near scutellum and anterior portion of suture very dense, asperate, and somewhat granulose. Hind wings fully developed. Metatarsomere I as long as, or longer than the combined length of II–IV.

Abdomen ( Fig. 113 View Figs 100–116 ) narrower than elytra, with deep anterior impressions on tergites III–V; tergites III–V each with a transverse row of coarse non-setiferous punctures in anterior impressions, with a transverse row of usually four setiferous punctures across the middle, and with four to six setiferous punctures at posterior margins; tergite VI with a transverse band of coarse non-setiferous punctures anteriorly, with a transverse row of four setiferous punctures at posterior third, and with six setiferous punctures at posterior margin; tergite VII with a transverse band of coarse non-setiferous punctures anteriorly and with two transverse rows of setiferous punctures posteriorly, posterior margin with palisade fringe; tergite VIII ( Fig. 248 View Figs 245–259 ) with approximately 20 long black setae posteriorly, posterior margin truncate or weakly concave in the middle.

♂: sternite VIII ( Fig. 249 View Figs 245–259 ) with numerous long black setae in posterior half, posterior margin convex; median lobe of aedeagus ( Figs 245–246 View Figs 245–259 ) approximately 1.2 mm long and of robust shape; ventral process basally with a pair of pronounced carinae; paramere ( Fig. 247 View Figs 245–259 ) as long as median lobe and with very small apical lobe with long setae.

Comparative notes: This species is characterized by its conspicuously large size, coarse punctation, its coloration, the punctation pattern of the pronotum, and by the male sexual characters. It is distinguished from the similarly large Z. preangeranus by the coloration ( Z. preangeranus : antennomeres I–VII blackish; head much darker than the pronotum; abdominal segments II–V reddish), much coarser punctation of the forebody, less slender antennomeres IV–X, a completely different punctation pattern of the abdomen, and by a more robust aedeagus with a ventral process of completely different shape. For illustrations of Z. preangeranus see ASSING (2016a) and Figs 276–277 View Figs 260–277 .

Distribution and natural history: The type locality is identical to that of Z. densissimus . The type specimens were collected with flight interception traps in lowland forest at an altitude of 200 m.