Paraphloeostiba vitiosa, Shavrin, 2024

Shavrin, Alexey V., 2024, Twenty-one new species of Omaliini from the Papuan Region (Coleoptera: Staphylinidae: Omaliinae), with diagnostic and faunistic notes on some species of the genus Paraphloeostiba Steel, 1960, Zootaxa 5424 (3), pp. 251-307 : 298-300

Paraphloeostiba vitiosa sp. n.

( Figs 148–151 )

Type material. Holotype ♂: ‘ IRIAN JAYA: Paniai Prov. | Bilogay, 29.12.1995 | 2100-2200m | leg. A. Riedel’ <printed>, ‘ HOLOTYPE | Paraphloeostiba | vitiosa sp. n. | Shavrin A. V. des. 2024’ <red, printed> ( NMW).

Description. Measurements (dissected; specimens with damaged abdomen): HW: 0.42; HL: 0.25; OL: 0.02; TL: 0.04; AL: 0.62; PL: 0.27; PWmax: 0.52; PWmin: 0.49; ESL: 0.57; EW: 0.67; MTbL: 0.31; MTrL: 0.15 (MTrL 1–4: 0.05; MTrL 5: 0.10); AW: 0.67; AedL: 0.42; BL: 2.10.

Body yellow-brown; antennomeres 6–11 brown; mouthparts, antennomeres 1–5 and legs yellow. Pronotum with dense, large and deep punctation, finer and sparser in parascutellar portion and along suture. Elytra with very dense fine punctation. Pronotum with very dense isodiametric microsculpture, slightly larger than that in middle portion of head; microsculpture of elytra dense, isodiametric, indistinct in middle.

Head 1.6 times as broad as long, with narrow and deep anteocellar foveae. Distance between ocelli about as long as distance between ocellus and posterior margin of eyes. Apical maxillary palpomere about 1.4 times as long as preapical segment. Antennomeres 8–10 slightly transverse; antennomere 4 slightly narrower and distinctly shorter than 3, 5 slightly longer and broader than 4, 6 broader than 5, 7 slightly longer and broader than 6, 8 slightly broader than 7, 9–10 slightly longer and broader than 8.

Pronotum slightly narrower than long, 1.2 times as broad as head, widest in middle, more narrowed posteriad than anteriad; middle portion with distinct deep, wide longitudinal impressions, more broad and deep in mediobasal portion; laterobasal impressions wide and deep.

Elytra slightly more than twice as long as pronotum, with narrowly impressed lateral portions; surface of each elytron with distinct irregular longitudinal elevations between punctures.

Abdomen as broad as elytra.

Male. Posterior margin of abdominal tergite VIII truncate ( Fig. 150 ). Posterior margin of abdominal sternite VIII concave ( Fig. 151 ). Aedeagus with wide basal portion, gradually narrowed toward wide median lobe, with rounded apex; parameres significantly longer than apex of median lobe, with ditsinctly broadened apical portions, with several long apical and preapical setae on inner surface of each setiferous lobe, with several short setae along inner and outer margins of each paramere; internal sac complicated, moderately wide and long, with several large sclerotized structures: curved in middle and elongate in basal portion ( Fig. 148 ). Lateral aspect of the aedeagus as in Fig. 149 .

Female unknown.

Comparative notes. Paraphloeostiba vitiosa sp. n. can be distinguished from other species of the genus by the slightly transverse antennomeres 8–10, elongate elytra, slightly more than twice as long as pronotum, the general shape of the aedeagus, with very wide middle part of the median lobe, gradually narrowed toward apex, the parameres, significantly exceeding apex of the median lobe, and the complicated structure of the internal sac.

Distribution. Paraphloeostiba vitiosa sp. n. is known only from the type locality in Western New Guinea, Indonesia.

Etymology. The specific epithet is the Latin vitiosus, - a, - um (damaged). It alludes to the general condition of the holotype.

Bionomics. Specimens were collected at elevations from 2100 to 2200 m a.s.l. The detailed bionomical data are unknown.

Figures

FIGURES 148–151. Paraphloeostiba vitiosa (holotype): 148–aedeagus, parameral view, 149–aedeagus, lateral view, 150–male abdominal tergite VIII, 151–male abdominal sternite VIII. Scale bar: 0.1 mm.