Paraphloeostiba moluccensis, Shavrin, 2022

Shavrin, Alexey V., 2022, New species and records of Omaliini McLeay, 1825 from Eastern Palaearctic and Oriental regions (Coleoptera: Staphylinidae: Omaliinae), Zootaxa 5169 (5), pp. 457-471 : 464-465

Paraphloeostiba moluccensis sp.n.

( Figs. 24–27 )

Type material examined. Holotype ♂ (dissected): ‘ INDO: Maluc F911216 | Tanimbar isl. Yamndena | Sangliat Kramain (12) | Agosti 16.9.91. litter’ <printed>, ‘HOLOTYPE | Paraphloeostiba | moluccensis sp.n. | Shavrin A.V. des. 2022’ <red, printed> ( MHNG).

Description. Measurements: HW: 0.36; HL: 0.17; AL: 0.42; OL: 0.12; PL: 0.26; PW: 0.48; ESL: 0.45; EW: 0.57; AW: 0.57; MTbL: 0.25; MTrL: 0.13 (MTrL 1–4: 0.05; MTrL 5: 0.08); AedL: 0.33; TL: 1.54.

Body yellow-brown, with darkened head and apical portions of elytra; atennomeres 6–11 brown; mouthparts, antennomeres 1–5 and legs yellow. Head with very indistinct and fine punctation in middle; neck, scutellum and abdomen without visible punctures; pronotum with very indistinct and fine, sparse punctation in lateral portions; elytra with fine and sparse punctation, indistinct in mediobasal portion. Head with regular and strong isodiametric microsculpture; neck with dense transverse meshes; pronotum with dense isodiametric microreticulation, finer in mediobasal portion; scutellum with very fine isodiametric sculpture; microsculpture with very dense, isodiametric sculpture, but coarser than that in pronotum; abdomen with distinct isodiametric microreticulation.

Head strongly transverse, twice as broad as long, with very deep and short rectangular anteocellar foveae reaching level of basal third of eyes; postocular carina distinct, acute.Apical maxillary palpomere moderately narrow, about two and a half times as long as preapical segment. Antennomere 3 about twice narrower than antennomere 2, 4 slightly longer than broad, 5 about as long as broad, 6 disitnctly broader than 5, 6–9 broader than 5, 10 slightly longer than 9.

Pronotum 1.3 times as broad as head; anterior margin straight and as long as posterior margin; middle portion without impressions; laterobasal portions widely impressed.

Elytra 1.2 times as broad as long, 1.7 times as long as pronotum.

Metatrsi 1.9 times as long as metatibia.

Abdomen as broad as elytra.

Male. Posterior margin of abdominal tergite VIII truncate ( Fig. 26 ). Posterior margin of abdominal sternite VIII widely and deeply concave ( Fig. 27 ). Aedeagus with moderately wide basal portion, gradually narrowed toward rounded apex; parameres long, slightly exceeding apex of median lobe, widened apically, with two long apical and two short preapical setae, and additional four setae on inner margin and middle surface of each paramere; internal sac long and moderately narrow, with several long sclerotized structures in basal portion ( Fig. 24 ). Lateral aspect of aedeagus as in Fig. 25 .

Female unknown.

Comparative notes. Regarding the coloration of the small body, shapes of the postocular carina and the antennomere 3 distinctly broader than long, and the general shape of the aedeagus, P. moluccensis sp.n. is similar to Sumatrense P. similis Steel, 1960 , from which it can be distinguished by the smaller body, abscence of the paramedian impression on the pronotum, narrower apical portion of the median lobe and broader apical portions of the parameres.

Distribution. The new species is at present known only from the type locality in Maluku province of Indonesia: Yamdena Island (Tanimbar islands).

Bionomics. The specimen was sifted from the forest litter.

Etymology. The specific epithet refers to the province of Indonesia where the new species was collected.

Figures

FIGURES 24–27. Paraphloeostiba moluccensis: 24–aedeagus, parameral view, 25–aedeagus, lateral view, 26–male abdominal tergite VIII, 27–male abdominal sternite VIII. Scale bar: 0.10 mm.