Sagola snaresensis Park and Carlton

Park, J. - S. & Carlton, C. E., 2014, A revision of the New Zealand species of the genus Sagola Sharp (Coleoptera: Staphylinidae: Pselaphinae: Faronitae), The Coleopterists Bulletin (mo 13) 68, pp. 1-156 : 152

Sagola snaresensis Park and Carlton , new species

( Figs. 76b, 76d, 76f , 78 )

Type Material. Holotype. NEW ZEALAND: Snares Islands : 1♂ ( NZAC), “New Zealand: SN: Penguin Ck. In wet Olearia lyallii 26 Oct 1972, DS Horning”, “ HOLOTYPE Sagola snaresensis Park and Carlton 2013 ” . Paratypes (n = 22: 10 males; 12 females). NEW ZEALAND: Snares Islands : 1♀ ( NZAC), same data as holotype ; 2♂♂ 4♀♀ ( NZAC), Penguin Ck , rotten wood of Olearia lyallii stump, 11 III 1971, D.S. Horning ; 2♂♂ 1♀ ( NZAC), Signpost Hill , Stilbocarpa robusta litter, 26 VIII 1972, D.S. Horning ; 2♂♂ ( NZAC), Broughton I, Stilbocarpa robusta , 4 XI 1972, D.S. Horning ; 1♂ ( NZAC), sw Promontory , Olearia lyallii litter, 31 VII 1972, D.S. Horning ; 2♂♂ ( NZAC), Penguin Creek , 14 XII 1974, D.S. Horning, under branches of Olearia lyallii ; 2♀♀ ( NZAC), nr Penguin Colony , 19 I 1972, C.J. Horning, rotten Olearia lyallii ; 1♀ ( NZAC), Opp Mollymauk Islet , 24 I 1967, P.M. Johns, beating Poa astonii ; 1♀ ( NZAC), Penguin Creek , 26 X 1972, D.S. Horning, wet Olearia lyallii litter ; 1♀ ( AMNZ), nr Razorbark , 15 XII 1976, J.W. Early, under loose rock on peat ; 1♀ ( NZAC), Rocky Islet , 28 II 1971, D.S. Horning, Tillaea moscha sample from rotten granite .

Etymology. This species is named after the type locality, Snares Islands.

Diagnosis. This species can be distinguished from other Sagola species by the following combination of characters: body small, length 2.2–2.5 mm; anterior frontal fovea round and partially covered by frontal rostrum, posterior frontal fovea round; eye small, one-third length of temple; shape of antennomeres and genitalia unique to species; only known from Snares Islands.

Description. Length 2.2–2.5 mm. Body brown, antennae, legs, maxillary palpi, and elytra paler ( Fig. 76b ). Head: Male head round, widest across eyes ( Fig. 76f ). Antennomere 1 approximately 1.5 times longer than wide, 2 longer than wide, 3 subquadrate, 4–6 longer than wide, 7–10 subquadrate. Frontal sulcus shallow reaching midpoint of eye ( Fig. 76f ). Anterior frontal fovea round, partially covered by frontal rostrum, posterior frontal fovea round ( Fig. 76f ). Eye small, one-third length of temple ( Fig. 76f ). Thorax: Prosternum as long as wide, widest at midpoint. Elytra approximately as long as wide ( Fig. 76b ). Meso- and metathorax trapezoidal, as long as wide. Abdomen: Male tergite IV without patch of microtrichia. Male ventrite VII with round depression. Aedeagus: Median lobe of genitalia bluntly triangular ( Fig. 76d ). Phallobase of median lobe symmetrical and rectangular ( Fig. 76d ). Parameres symmetrical, with thick setae from apex to middle ( Fig. 76d ).

Distribution. Snares Islands ( Fig. 78 : black square).

Habitat. Specimens of this species were collected mostly by sifting leaf and wood litter of Olearia lyallii Hook. f ( Asteraceae ) or Stilbocarpa robusta (Kirk) Cockayne (Araliaceae) .

Figures

Fig. 76. Sagola species in the flemingensis species-group. Habitus, dorsal views: a) S. flemingensis, b) S. snaresensis. Aedeagi, dorsal views: c) S. flemingensis, d) S. snaresensis. Male heads, dorsal views: e) S. flemingensis, f) S. snaresensis. Scale bars a–b = 1 mm, c–f = 0.1 mm.

Fig. 78 Known collection localities of New Zealand Sagola species. S. genalis: black circles; S. flemingensis: triangle; S. snaresensis: black square; S. opercularis: star.