Paraphloeostiba ullrichi, Shavrin, 2023

Shavrin, Alexey V., 2023, New species and records of the genus Paraphloeostiba Steel, 1960 (Coleoptera: Staphylinidae: Omaliinae) from Papua New Guinea, and notes on some species from India, Indonesia and Philippines, Zootaxa 5301 (4), pp. 486-500 : 494-496

Paraphloeostiba ullrichi sp.n.

( Figs. 6 , 26–32 )

Type material. Holotype ♁: ‘12 VIII 79 [handwritten in black] | PNG /EHProv. | Umg. Kainantu | Onerunka` <printed>, ‘Papua | Nlle Guinée | W. G. Ullrich <printed>, ‘HOLOTYPE | Paraphloeostiba | ullrichi sp.n. | Shavrin A.V. des. 2023`<red, printed> ( MHNG) .

Paratypes: 3 ♁♁ (two specimens dissected), 4 ♀♀ (one specimen dissected): same data as the holotype (2 ♁♁: cSh, 1 ♁, 4 ♀♀: MHNG); 1 ♁ (head damaged, aedeagus missing), 7 ♀♀ (one specimen without head): ‘PAPUA N. GUINEA | Onerunka VIII. 79 [handwritten in black] | nr Kainantu | W. G. Ullrich` <printed> (1 ♁, 2 ♀♀: cSh; 5 ♀♀: MHNG). All paratypes with additional red printed label: ‘ PARATYPE | Paraphloeostiba | ullrichi sp.n. | Shavrin A.V. des. 2023`.

Description. Measurements (n=16): HW: 0.34–0.39; HL: 0.18–0.24; OL: 0.12–0.13; TL: 0.02–0.00; AL (holotype): 0.55; PL: 0.28–0.34; PWmax: 0.52–0.57; PWmin: 0.41–0.46; ESL: 0.49–0.54; EW: 0.62–0.66; MTbL (holotype): 0.30; MTrL (holotype): 0.13 (MTrL 1–4: 0.05; MTrL 5: 0.08); AW: 0.59–0.64; AedL: 0.30–0.32; BL: 1.40–2.34 (holotype: 1.75).

Habitus as in Fig. 6 . Body yellow-brown (one paratype) to reddish-brown; mouthparts, antennae and legs yellow (antennomeres 7–11 sometimes slightly darker). Head with very sparse and fine punctation, middle portion of head usually without punctures; neck and scutellum without punctures; pronotum with sparse, moderately large and deep pucntation, sparser in middle portion; punctation of elytra sparse, distinctly larger and deeper than that on pronotum, sparser and finer in middle portions of each elytron; abdomen with fine and sparse punctation, sparser and finer in middle portion of each tergites. Head with very fine microsculpture, somewhat isodiametric in middle and sometimes indistinct in basal portions; neck with very fine transverse microreticulation; pronotum with fine transverse sculpture, indistinct in mediobasal portion in some paratypes; scutellum with very fine transverse meshes; elytra without microsculpture except basal portion with fine transverse microreticulation in some paratypes; abdomen with fine transverse meshes.

Head slightly elevated in middle portion, 1.6–1.8 times as broad as long, with short and deep anteocellar foveae, slightly longer than diameter of ocellus, reaching basal third of level of eyes. Apical maxillary palpomere narrow and short, about 1.3 times as long as preapical segment. Antennomeres 6–10 strongly transverse; antennomere 2 about as broad as basal antennomere, 3 distinctly narrower and shorter than 2, 4 shorter than 3, 5 slightly broader than 4, 6 about twice broader than 5, 7 distinctly broader and longer than 6, 8–10 slightly shorter than 7, apical antennomere about three times as long as 10, from middle gradually narrowed toward subacute apex.

Pronotum 1.6–1.8 times as broad as long, 1.4–1.5 times as broad as head, widest in middle, more narrowed posteriad than anteriad; posterior angles obtuse; anterior margin distinctly concave in middle; middle portion without paramedian impressions; laterobasal portions without or with with shallow and moderately wide impressions.

Elytra 1.2 times as broad as long, 1.5–1.7 as long as pronotum, distinctly broadened apicad; posterior margin slightly rounded.

Abdomen slightly narrower than elytra.

Male. Posterior margin of abdominal tergite VIII slightly concave ( Fig. 28 ). Posterior margin of abdominal sternite VIII widely and deeply concave ( Fig. 29 ). Aedeagus with small basal bulb, gradually narrowed toward narrow and long median lobe with rounded apex; parameres short, not reaching apex of median lobe, with two moderately long apical and three preapical setae; internal sac moderately narrow and short, with sclerotized narrow struncture in basal portion ( Fig. 26 ). Lateral aspect of the aedeagus as in Fig. 27 .

Female. Posterior margin of abdominal tergite VIII truncate ( Fig. 30 ). Posterior margin of abdominal sternite VIII widely rounded ( Fig. 31 ). Female genital segment as in Fig. 32 . Female acessory sclerite and spermatheca not recognized.

Comparative notes. Based on the glossy body with fine sculpture of the forebody and the general shape of the aedeagus, P. ullrichi sp.n. is similar to P. solomonensis Steel, 1960 , known from “ Solomon Islands: Guadalcanal, Kukum...” ( Steel 1960). It can be distinguished from it by the slightly broader apical portion of the median lobe and shorter parameres.

Distribution. Paraphloeostiba ullrichi sp.n. is known from two localities in eastern part of Papua New Guinea.

Etymology. Patronymic, the species is named to honour W.G. Ullrich (Lübeck), collector of the type specimens in Papua New Guinea.

Figures

FIGURES 1–6. Habitus of Paraphloeostiba: 1—P. conjuncta (holotype), 2—P. coriacea, 3—P. flaveola (holotype), 4—P. gayndahensis (Papua New Guinea), 5—P. papuana (holotype), 6—P. ullrichi (paratype). Scale bars: 1.0 mm.

FIGURES 26–32. Aedeagus and abdominal segments of Paraphloeostiba ullrichi (paratypes): 26—aedeagus (parameral view), 27—aedeagus (lateral view), 28—male tergite VIII (dorsal view), 29—male sternite VIII (ventral view), 30—female tergite VIII (dorsal view), 31—female sternite VIII (ventral view), 32—female genital segment. Scale bar: 0.1 mm.