Paraphloeostiba, Steel, 1960

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 : 496-497

Key to species of Paraphloeostiba of Papua New Guinea

1 Laterobasal portions of pronotum widely and deeply concave in front of posterior angles............................ 2

- Laterobasal portion of pronotum slightly concave in front of posterior angles or evenly narrowed posteriad.............. 3

2 Middle portion of pronotum with two distinct and wide paramedian impressions. Apical portions of median lobe and parameres narrow ( Fig. 7 ). Body reddish-brown. Habitus as in Fig. 1 . Body length: 1.78–2.10 mm ................. P. conjuncta sp.n.

- Middle portion of pronotum without visible paramedian impressions. Apical portions of median lobe and parameres wide ( Fig. 15 ). Body yellow-brown. Habitus as in Fig. 3 . Body length: 2.00– 2.35 mm ........................... P. flaveola sp.n.

3 Forebody very glossy, with very fine and sparse punctation and fine microsculpture. Median lobe narrow, parameres not exceeding apex of median lobe ( Fig. 26 ). Female accessory sclerite missing. Body yellow-brown to reddish-brown. Habitus as in Fig. 6 . Body length: 1.40–2.34 mm .......................................................... P. ullrichi sp.n.

- Forebody less glossy, with moderately large and dense punctation and coarse microspulpture. Median lobe moderately broad, parameres slightly longer than apex of median lobe. Female accessory sclerite present............................... 4

4 Laterobasal portions of pronotum more or less evenly narrowed toward postertior angles. Female accessory sclerite as in Fig. 24 . Body yellow-brown. Habitus as in Fig. 5 . Body smaller: 1.80–1.85 mm ................. P. papuana ( Cameron, 1931)

- Lateroabasal portions of pronotum slightly concave in front of posterior angles. Body darker and larger................. 5

5 Microsculpture of head and pronotum moderately fine. Median lobe and apical portions of parameres narrow ( Fig. 25 in Shavrin (2020)). Habitus as in Fig. 4 . Body length: 2.10–3.50 mm .................... P. gayndahensis ( MacLeay, 1873)

- Microsculpture of head and pronotum coarse. Median lobe and apical portions of parameres moderately wide ( Fig. 11 ). Habitus as in Fig. 2 . Body length: 2.56 mm ................................................. P. coriacea ( Cameron, 1952)

Figures

FIGURES 7–14. Aedeagus and abdominal segments of Paraphloeostiba conjuncta (Figs. 7–10) and P. coriacea (Figs. 11–14): 7, 11—aedeagus, parameral view, 8, 12—aedeagus, lateral view, 9, 13—male tergite VIII, dorsal view, 10, 14—male sternite VIII, ventral view. Scale bar: 0.1 mm.

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 15–25. Aedeagus and abdominal segments of Paraphloeostiba flaveola (Figs, 15–21: holotype) and P. papuana (Figs. 22–25): 15—aedeagus, parameral view, 16—aedeagus, (lateral view), 17—male tergite VIII, dorsal view, 18—male sternite VIII, ventral view, 19, 22—female tergite VIII, dorsal view, 20, 23—female sternite VIII, ventral view, 21, 24—female genital segment, ventral view, 25—spermatheca, lateral view. Scale bar: 0.1 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.