Paraphloeostiba, Steel, 1960

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 : 300-302

Key to species of the genus Paraphloeostiba of New Guinea and Solomon Islands

1 Middle portion of pronotum with two distinct longitudinal impressions.......................................... 2

- Middle portion of pronotum without or with indistinct longitudinal impressions................................... 8

2 Body more than 2.00 mm.............................................................................. 4

- Body distinctly less than 2.00 mm....................................................................... 7

4 Antennomeres 8–10 slightly transverse. Elytra slightly more than twice as long as pronotum. Median lobe wide, gradually narrowed toward apex; parameres significantly longer than apex of median lobe, with wide apical portions ( Fig. 148 ). Body yellow-brown. Body length: 2.10 mm. Indonesia (Western New Guinea).............................. P. vitiosa sp. n.

- Antennomeres 8–10 distinctly transverse. Elytra less than twice as long as pronotum. Median lobe different, parameres shorter............................................................................................. 5

5 Head and pronotum without punctation. Aedeagus as in Fig. 11 in Shavrin (2023b). Body brown. Habitus as in Fig. 39 and in Fig. 2 in Shavrin (2023b). Female accessory sclerite as in Fig. 56 . Body length: 2.08–3.08 mm P. coriacea ( Cameron, 1952)

- Head and pronotum with distinct punctation................................................................ 6

6 Pronotum widest slightly above middle, strongly narrowed posteriad, with slightly concave laterobasal margins. Apical part of median lobe moderately narrow; parameres slightly not reaching apex of median lobe, with distinctly broadened apical portions ( Fig. 57 ). Body yellow-brown to reddish-brown. Habitus as in Fig. 42 . Female accessory sclerite as in Fig. 63 . Body length: 2.07–3.07 mm. Solomon Islands..................................................... P. guadalcanalensis sp. n.

- Pronotum widest in middle, relatively gradually narowed toward hind angles, without distinctly concave laterobasal margins. Apical part of median lobe moderately broad; parameres reaching or slightly exceeding apex of median lobe, with slightly broadened apical portions ( Fig. 25 in Shavrin (2020)). Body brown, usually with paler middle portions of elytra. Habitus as in Fig 4 in Shavrin (2023b). Female accessory sclerite as in Fig. 99 in Steel (1960). Body length: 2.10–3.50 mm. Cosmopolitan species................................................................... P. gayndahensis ( MacLeay, 1873)

7 Elytra about twice as long as pronotum. Apical part of median lobe moderately wide; parameres slightly exceeding apex of median lobe ( Fig. 64 ). Body brown. Habitus as in Fig. 40 . Body length: 1.72–1.96 mm. Indonesia (Western New Guinea)........................................................................................... P. iriana sp. n.

- Elytra distinctly less than twice as long as pronotum. Apex of median lobe narrow; parameres distinctly not exceeding apex of median lobe ( Fig. 85 ). Body reddish-brown. Habitus as in Fig. 75 . Body length: 1.63–1.86 mm. Papua New Guinea............................................................................................ P. okapensis sp. n.

8 Antennomeres 6–10 strongly transverse, preapical antennomere three times as broad as long......................... 9

- Antennomeres 6–10 less transverse, preapical antennomere about twice as broad as long........................... 10

9 Elytra about twice as long as pronotum. Parameres significantly longer than apex of median lobe, with wide apical portions ( Fig. 111 ). Head and elytra reddish or darker; pronotum and abdomen yellow-brown. Habitus as in Fig. 79 . Female accessory sclerite as in Fig. 117 . Body smaller: 1.53–1.87 mm. Indonesia (Sumatra), Papua New Guinea................................................................................................... P. rhopalocera ( Cameron, 1928)

- Elytra distinctly less than twice as long as pronotum. Parameres distinctly exceeding apex of median lobe, with very wide apical portions ( Fig. 32 in Steel 1960). Body reddish-brown. Forebody as in Fig. 9 in Steel (1960). Body larger: 2.00 mm. Papua New Guinea (New Britain)......................................................... P. specularis ( Bernhauer, 1915)

10 Laterobasal margins of pronotum distinctly concave in front of hind angles...................................... 11

- Laterobasal margins of pronotum gradually narrowed toward hind angles....................................... 13

11 Pronotum twice as broad as long, with widely rounded apical angles slighlty protruded apicad. Parameres very narrow, significantly shorter than apex of median lobe ( Fig. 144 ). Body reddish-brown. Habitus as in Fig. 141 . Body length: 1.82 mm. Papua New Guinea........................................................................ P. telnovi sp. n.

- Pronotum distinctly less than twice as broad as long, with narrower apical angles not protruded apicad. Parameres wider and longer............................................................................................. 12

12 Head without or with indistinct fine punctation. Median lobe narrow; parameres narrow, reaching apex of median lobe, with narrow apical portions ( Fig. 20 ). Body yellowish-brown to reddish brown, with paler elytra. Habitus as in Fig. 4 . Body length: 1.58–2.00 mm. Papua New Guinea......................................................... P. attenuata sp. n.

- Head without punctation. Median lobe moderately wide; parameres slightly exceeding apex of median lobe, with distinctly broadened apical portions ( Fig. 7 in Shavrin (2023b)). Body reddish-brown. Habitus as in Fig. 1 in Shavrin (2023b). Female accessory sclerite as in Fig. 38 . Body length: 1.78–2.35 mm. Indonesia (Western New Guinea), Papua New Guinea...................................................................................... P. conjuncta Shavrin, 2023

13 Head and pronotum without punctation.................................................................. 14

- Head without or with distinct punctation, but pronotum always with punctures................................... 15

14 Pronotum transverse, slightly more than twice as broad as long; surface of elytra without elevations between punctures. Parameres slightly exceeding apex of median lobe, with wide apical portions, with several short apical and preapical setae ( Fig. 97 ). Body yellow-brown, with reddish-brown apical portions of elytra. Habitus as in Fig. 76 . Female accessory sclerite as in Fig. 103 . Body length: 1.40–2.00 mm. Solomon Islands....................................... P. penelopeae sp. n.

- Pronotum less transverse, about one and a half times as broad as long; surface of elytra with distinct elevations between punctures. Parameres significantly exceeding apes of median lobe, with numerous very long apical and preapical setae ( Fig. 104 ). Body dark-brown. Habitus as in Fig. 77 . Female accessory sclerite as in Fig. 110 . Body length: 1.95–2.65 mm. Indonesia (Western New Guinea)..................................................................... P. pilosa sp. n.

15 Antennomeres 6–7 about as broad as long. Aedeagus long, with moderately wide and elongate median lobe with rounded apex ( Fig. 81 ). Body reddish-brown, with paler elytra and abdomen. Habitus as in Fig. 43 . Body length: 2.57–2.77 mm. Indonesia (Western New Guinea)............................................................. P. margineguttata sp. n.

- Antennomeres 6–10 distinctly transverse. Aedeagus and coloration of body different.............................. 16

16 Head without punctation.............................................................................. 17

- Head with distinct punctation.......................................................................... 22

17 Elytra with large and deep punctation and with distinct elevations between punctures. Apical portion of median lobe very narrow; parameres with very wide apical portions ( Fig. 133 ). Body reddish-brown. Habitus as in Fig. 44 . Body length: 1.78– 1.90 mm. Papua New Guinea................................................................ P. steeli sp. n.

- Elytra with distinctly finer punctation, without elevations between punctures.Apical portion of median lobe narrower; parameres different. Coloration of body different................................................................... 18

18 Elytra longer, twice as long as pronotum. Aedeagus as in Fig. 46 . Body yellow-brown to brown, with slightly paler elytra and darkened apical portions. Female accessory sclerite as in Fig. 52 . Body length: 1.47–2.07 mm. Papua New Guinea............................................................................................ P. coprophila sp. n.

- Elytra shorter, distinctly less than twice as long as pronotum. Coloration of body different.......................... 19

19 Body yellow-brown. Median lobe and apical portions of parameres wide........................................ 20

- Body darker. Median lobe and apical portions of parameres narrow............................................ 21

20 Lateral sides of pronotum gradually narrowed both anteriad and posteriad. Body yellow-brown, with reddish-brown apical portions of elytra. Median lobe slightly broader; parameres significantly longer than apex of median lobe ( Fig. 12 ). Habitus as in Fig 2 . Body smaller: 1.76 mm. Papua New Guinea........................................... P. assimile sp. n.

- Lateral sides of pronotum slightly more narrowed posteriad than anteriad. Body yellow-brown. Median lobe relatively narrower; parameres slightly exceeding apex of median lobe ( Fig. 15 in Shavrin (2023b)). Habitus as in Fig. 3 in Shavrin (2023b). Female accessory sclerite asi n Fig. 21 in Shavrin (2023b). Body larger: 2.00– 2.35 mm. Papua New Guinea................................................................................................... P. flaveola Shavrin, 2023

21 Disc of pronotum without longitudinal impressions. Apical parts of median lobe and parameres narrow ( Fig. 32 ). Body brown. Habitus as in Fig. 6 . Body smaller: 1.42 mm. Papua New Guinea................................. P. betlephila sp. n.

- Disc of pronotum with indistinct longitudinal impressions. Apical parts of median lobe and parameres distinctly broader ( Fig. 119 ). Body yellowish brown to reddish-brown, with slightly paler elytra. Habitus as in Fig. 78 . Female accessory sclerite as in Fig. 125 . Body larger: 1.80–2.40 mm. Indonesia (Western New Guinea)............................. P. riedeli sp. n.

22 Body dark brown. Habitus as in Fig. 3 . Body distinctly larger: 2.75 mm. Aedeagus as in Fig. 16 . Indonesia (Western New Guinea)........................................................................... P. atramentaria sp. n.

- Body paler and smaller............................................................................... 23

23 Median lobe wide, with widely rounded apex ( Fig. 68 ). Body reddish brown, with paler elytra. Habitus as in Fig. 41 . Female accessory sclerite as in Fig. 74 . Body length: 1.67–2.10 mm. Papua New Guinea.................... P. latissima sp. n.

- Median lobe distinctly narrower, with narrower apex. Coloration different....................................... 24

24 Median lobe wide; parameres with distinctly broadened apical portions......................................... 25

- Median lobe and apical portion of parameres narrower...................................................... 26

25 Pronotum strongly transverse. Apical portions of parameres very wide ( Fig. 92 ). Body yellow-brown. Habitus as in Fig. 5 in Shavrin (2023b). Female accessory sclerite as in Fig. 24 in Shavrin (2023b). Body smaller: 1.27–1.85 mm. Indonesia (Western New Guinea), Papua New Guinea................................................. P. papuana ( Cameron, 1931)

- Pronotum slightly transverse. Apical portions of parameres distinctly narrower ( Fig. 126 ). Body reddish-brown, with distinctly paler elytra. Habitus as in Fig. 80 . Female accessory sclerite as in Fig. 132 . Body larger: 2.00– 2.32 mm. Papua New Guinea......................................................................................... P. rufula sp. n.

26 Basal portion of aedeagus narrow; median lobe moderately wide and long; parameres narrow, distinctly not reaching apex of median lobe ( Fig. 26 in Shavrin (2023b)). Body reddish-brown, with paler elytra. Habitus as in Fig. 6 in Shavrin (2023b). Body length: 1.62–1.79 mm. Papua New Guinea.............................................. P. ullrichi Shavrin, 2023

- Basal portion of aedeagus wide; median lobe very narrow, moderately short; parameres distinctly exceeding apex of median lobe, with broadened apical portions ( Fig. 26 ). Body yellow-brown to reddish-brown. Habitus as in Fig. 5 . Body length: 1.40–2.34 mm. Papua New Guinea.......................................................... P. barclayi sp. n.

Figures

FIGURE 11. Distribution of Nipponophloeostiba: N. verrucifera (circles), N. thayeri (triangle), N. longilobata (square), N. explanata (diamond), N. hornabrooki (star).

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.

FIGURES 39–44. Habitus of Paraphloeostiba: 39–P. coriacea (Western New Guinea), 40–P. iriana (paratype), 41–P. latissima (paratype), 42–P. guadalcanalensis (paratype), 43–P. margineguttata (holotype), 44–P. steeli (holotype). Scale bars: 1.0 mm.

FIGURES 1–6. Habitus of Omaliini: 1–Nipponophloeostiba hornabrooki (holotype), 2–Paraphloeostiba assimile (holotype), 3–P. atramentaria (holotype), 4–P. attenuata (paratype), 5–P. barclayi (paratype), 6–P. betlephila (holotype). Scale bars: 1.0 mm.

FIGURES 53–56. Paraphloeostiba coriacea: 53–aedeagus, parameral view (Western New Guinea), 54–female abdominal tergite VIII, 55–female abdominal sternite VIII, 56–female accessory sclerite. Scale bar: 0.1 mm.

FIGURES 57–63. Paraphloeostiba guadalcanalensis (paratypes): 57–aedeagus, parameral view, 58–aedeagus, lateral view, 59–male abdominal tergite VIII, 60–male abdominal sternite VIII, 61–female abdominal tergite VIII, 62–female abdominal sternite VIII, 63–female accessory sclerite. Scale bar: 0.1 mm.

FIGURES 20–25. Paraphloeostiba attenuata (paratypes): 20–aedeagus, parameral view, 21–aedeagus, lateral view, 22–male abdominal tergite VIII, 23–male abdominal sternite VIII, 24–female abdominal tergite VIII, 25–female abdominal sternite VIII. Scale bar: 0.1 mm.

FIGURES 97–103. Paraphloeostiba penelopeae (paratypes): 97–aedeagus, parameral view, 98–aedeagus, lateral view, 99– male abdominal tergite VIII, 100–male abdominal sternite VIII, 101–female abdominal tergite VIII, 102–female abdominal sternite VIII, 103–female accessory sclerite. Scale bar: 0.1 mm.

FIGURES 64–67. Paraphloeostiba iriana (holotype): 64–aedeagus, parameral view, 65–aedeagus, lateral view, 66–male abdominal tergite VIII, 67–male abdominal sternite VIII. Scale bar: 0.1 mm.

FIGURES 85–91. Paraphloeostiba okapensis (paratypes): 85–aedeagus, parameral view, 86–aedeagus, lateral view, 87–male abdominal tergite VIII, 88–male abdominal sternite VIII, 89–female abdominal tergite VIII, 90–female abdominal sternite VIII, 91–female accessory sclerite. Scale bar: 0.1 mm.

FIGURES 75–80. Habitus of Paraphloeostiba: 75–P. okapensis (paratype), 76–P. penelopeae (paratype), 77–P. pilosa (holotype), 78–P. riedeli (paratype), 79–P. rhopalocera, 80–P. rufula (holotype). Scale bars: 1.0 mm.

FIGURES 111–118. Paraphloeostiba rhopalocera: 111–aedeagus, parameral view (holotype), 112–aedeagus, lateral view (holotype), 113–male abdominal tergite VIII, 114–male abdominal sternite VIII, 115–female abdominal tergite VIII, 116–female abdominal sternite VIII, 117–female accessory sclerite, 118–spermatheca. Scale bar: 0.1 mm.

FIGURES 32–38. Paraphloeostiba betlephila (Figs. 32–35: holotype) and P. conjuncta (Figs. 36–38): 32–aedeagus, parameral view, 33–aedeagus, lateral view, 34–male abdominal tergite VIII, 35–male abdominal sternite VIII, 36–female abdominal tergite VIII, 37–female abdominal sternite VIII, 38–female accessory sclerite. Scale bar: 0.1 mm.

FIGURES 7–10. Nipponophloeostiba hornabrooki (holotype): 7–aedeagus, parameral view, 8–aedeagus, lateral view, 9–male abdominal tergite VIII, 10–male abdominal sternite VIII. Scale bar: 0.1 mm.

FIGURES 144–147. Paraphloeostiba telnovi (holotype): 144–aedeagus, parameral view, 145–aedeagus, lateral view, 146–male abdominal tergite VIII, 147–male abdominal sternite VIII. Scale bar: 0.1 mm.

FIGURES 141–143. Habitus of Omaliini: 141–Paraphloeostiba telnovi (holotype), 142–Xanthonomus guineensis (holotype), 143–X. thayerae (paratype). Scale bars: 1.0 mm.

FIGURES 104–110. Paraphloeostiba pilosa: 104–aedeagus, parameral view (holotype), 105–aedeagus, lateral view (holotype), 106–male abdominal tergite VIII, 107–male abdominal sternite VIII, 108–female abdominal tergite VIII, 109–female abdominal sternite VIII, 110–female accessory sclerite. Scale bar: 0.1 mm.

FIGURES 81–84. Paraphloeostiba margineguttata (holotype): 81–aedeagus, parameral view, 82–aedeagus, lateral view, 83– male abdominal tergite VIII, 84–male abdominal sternite VIII. Scale bar: 0.1 mm.

FIGURES 133–140. Paraphloeostiba steeli: 133–aedeagus, parameral view (holotype), 134–aedeagus, lateral view (holotype), 135–male abdominal tergite VIII, 136–male abdominal sternite VIII, 137–female abdominal tergite VIII, 138–female abdominal sternite VIII, 139–female accessory sclerite, 140–spermatheca. Scale bar: 0.1 mm.

FIGURES 46–52. Paraphloeostiba coprophila (paratypes): 46–aedeagus, parameral view, 47–aedeagus, lateral view, 48–male abdominal tergite VIII, 49–male abdominal sternite VIII, 50–female abdominal tergite VIII, 51–female abdominal sternite VIII, 52–female accessory sclerite. Scale bar: 0.1 mm.

FIGURES 12–15. Paraphloeostiba assimile (holotype): 12–aedeagus, parameral view, 13–aedeagus, lateral view, 14–male abdominal tergite VIII, 15–male abdominal sternite VIII. Scale bar: 0.1 mm.

FIGURES 119–125. Paraphloeostiba riedeli (paratypes): 119–aedeagus, parameral view (holotype), 120–aedeagus, lateral view (holotype), 121–male abdominal tergite VIII, 122–male abdominal sternite VIII, 123–female abdominal tergite VIII, 124– female abdominal sternite VIII, 125–female accessory sclerite. Scale bar: 0.1 mm.

FIGURES 16–19. Paraphloeostiba atramentaria (holotype): 16–aedeagus, parameral view, 17–aedeagus, lateral view, 18–male abdominal tergite VIII, 19–male abdominal sternite VIII. Scale bar: 0.1 mm.

FIGURES 68–74. Paraphloeostiba latissima (paratypes): 68–aedeagus, parameral view, 69–aedeagus, lateral view, 70–male abdominal tergite VIII, 71–male abdominal sternite VIII, 72–female abdominal tergite VIII, 73–female abdominal sternite VIII, 74–female accessory sclerite. Scale bar: 0.1 mm.

FIGURES 92–95. Paraphloeostiba papuana (Western New Guinea): 92–aedeagus, parameral view, 93–aedeagus, lateral view, 94–male abdominal tergite VIII, 95–male abdominal sternite VIII. Scale bar: 0.1 mm.

FIGURES 126–132. Paraphloeostiba rufula: 126–aedeagus, parameral view (holotype), 127–aedeagus, lateral view (holotype), 128–male abdominal tergite VIII, 129–male abdominal sternite VIII, 130–female abdominal tergite VIII, 131–female abdominal sternite VIII, 132–female accessory sclerite. Scale bar: 0.1 mm.

FIGURES 26–31. Paraphloeostiba barclayi (holotype): 26–aedeagus, parameral view, 27–aedeagus, lateral view, 28–male abdominal tergite VIII, 29–male abdominal sternite VIII, 30–female abdominal tergite VIII, 31–female abdominal sternite VIII. Scale bar: 0.1 mm.