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Holotype. New Zealand: Dunedin (DN): 1♂ (NZAC), aedeagus dissected and mounted in balsam on a clear plastic card, “New Zealand DN Leith Saddle / Leith trig tck, 420m 26 Sep 2011”, “Washed soil sample. temperate cloud forest”, “NZMS 260 144: 173868 430m”, “Voucher specimen “Beetles of Dunedin” project. JT Nunn coll.”, “HOLOTYPE Pseudoexeirarthra hlavaci Park and Carlton des. 2013”. Paratypes (n = 29; 11 males, 18 females): New Zealand: Dunedin (DN): 2♂♂, Swampy Summit, Dunedin, 29 X 2000, J. Nunn, tussock litter (JTN); 1♂, Leith Saddle, Swampy Spur Tck, 14 X 2001, J. Nunn, surface soil (JTN); 1♂, Waitati, 2 VIII 2008, washed soil sample in broadleaf forest (JTN); 1♂, Grahams Bush, Mt Cargill, 6 XII 2002, J. Nunn, FIT (JTN); 1♀, Swampy Summit, Dunedin, 7 I 2000, J. Nunn, shrubbery (JTN); 1♀, Cloud Forest of Leith tr, 30 XI 2003, J. Nunn, moss from tree trunk (JTN); 1♀, Grahams Bush, Mt. Cargill, 9 XII 2001, J. Nunn, podocarp-kamahi-griselinia litter (JTN); 1♀, Careys Creek near Waitati, 12 IV 2008, J. Nunn, washed soil in kanuka forest (JTN); 1♀, Swallow tr, Herbert Forest, 28 VII 2007, washed soil, J. Nunn (JTN); 1♀, Waipori Falls, 17 V 1998, Nothofagus forest litter (JTN); Southland (SL): 3♂♂, Papatowai, 9 II 1989, J. Nunn (JTN); 1♂ 3♀♀, Bog Burn, Waterloo Burn tck, 4 VI 2007, J. Nunn, washed soil in Nothofagus forest (JTN); 1♂, Purakaunui Falls, Catlins, 24 VI 2006, J. Nunn, soil sample in Nothofagus forest (JTN); 1♂, Pourakina River Walk, 27 X 2002, J. Nunn, bracket fungus (JTN); 2♀♀, Princhester Base Hut, Takitimu Forest, 4 VI 2007, J. Nunn, washed soil beech forest, 425 m (JTN); 3♀♀ (1♀, slide-mounted), Blacks Gully, Blue Mtns, 390 m, 2 XII 2006, J. Nunn, washed soil in Nothofagus forest (JTN); 2♀♀, Tautuku, 8 III 1989, J. Nunn (JTN); 1♀, Rakahouka, 2 IX 2007, J. Nunn, washed soil (JTN).
This species is named after Mr. Peter Hlaváč, world pselaphine beetle specialist, and an enthusiastic supporter of this study.
This species is distinguished from the other species of this genus by the following combination of characters: body length 2.3–2.6 mm; eyes large, as long as temples (Fig. 1I); antennomere 2 longer than wide, 3 subquadrate, 4 longer than wide, 5–8 subquadrate, 9–10 weakly transverse; median lobe of male genitalia divided, major lobe truncate and broadest at apex, minor lobe longer with small tubercles (Fig. 3I); parameres nearly symmetrical, right paramere slightly longer than left with setae present on mesal margins in apical two-thirds (Fig. 3I).
Length 2.3–2.6 mm. Body reddish brown, antennae, legs, maxillary palpi and elytra paler (Fig. 1I). Head round, as long as wide, widest across eyes (Fig. 1I). Antennomere 1 approximately 1.5 times longer than wide, 2 longer than wide, 3 subquadrate, 4 longer than wide, 5–8 subquadrate, 9–10 weakly transverse. Eyes large and prominent, as long as temples. Prosternum as long as wide, widest at one-third length. Elytra longer than wide (Fig. 1I). Hind wings fully developed. Meso- metaventrites trapezoidal, longer than wide. Tergite IV with pair of transverse patches of microtrichia reaching middle. Median lobe of genitalia divided, major lobe truncate and broadest at apex, minor lobe longer with small tubercles (Fig. 3I). Phallobase symmetrical and rounded (Fig. 3I). Parameres nearly symmetrical, right paramere slightly longer than left with setae present on mesal margins in apical two-thirds (Fig. 3I).
Dunedin (DN), Southland (SL) (Fig. 6: black circles).
Specimens were collected mostly by soil washing in Nothofagus and broadleaf forests.
- Park, J; Carlton, C; 2015: Pseudoexeirarthra, a new genus from New Zealand (Coleoptera, Staphylinidae, Pselaphinae), with descriptions of seven new species ZooKeys, (491): 95-118. doi