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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 Rocklands 21 Nov 1981 C.F. Butcher”, “Sweeping tussock nr stream”, “N.Z. Arthropod Collection, NZAC Private Bag 92170 AUCKLAND New Zealand”, “HOLOTYPE Pseudoexeirarthra parkeri Park and Carlton des. 2013”. Paratypes (n = 16; 12 males, 4 females): New Zealand: Central Otago (CO): 2♂♂, Carrick Range, Watts Rock, 1400 m, 11 III 1979, J. C. Watt, litter (NZAC); Mid Canterbury (MC): 1♂ 2♀♀, Bealy Spur, 750 m, 1 VI 1981, C. A. Muir, moss and rotten logs (NZAC); Otago Lakes (OL): 4♂♂, E Matukituki V, 400 m, J. W. Early, 30 I–4 II 1987, yellow pan tap (LUNZ); 1♂, Mt. Aspiring NP, Glacier Burn, 30 I 1987, J. W. Early, 400 m, sweeping Nothofagus forest (LUNZ); Westland (WD): 3♂♂ 1♀ (1♀, slide-mounted), Klondyke Corner, Arthurs Pass, 25 X 1970, D. S. Horning, litter (NZAC); 1♂, Mt. Tuhua, 1067 m, e side of L. Kaniere, 20 X 1984, C. F. Butcher, litter and mats (NZAC); 1♀, Okarito Trig, 150 m, 15 I 1982, J. W. Early, sweeping ferns and kiekie in rimu forest (LUNZ).
This species is named after Dr. Joseph Parker, 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 1.8–2.0 mm; eyes large, as long as temples (Fig. 1H); antennomeres 3 subquadrate, 4–5 longer than wide, 6–8 subquadrate, 9–10 weakly transverse; median lobe of male genitalia divided, apically bifurcate minor lobe longer than curved major lobe and bearing small tubercles (Fig. 3H); parameres asymmetrical, left longer than right with setae extending from apices to near bases (Fig. 3H).
Length 1.8–2.0 mm. Body reddish brown, antennae, legs, maxillary palpi, elytra paler (Fig. 1H). Head round, as long as wide, widest across eyes (Fig. 1H). Antennomere 1 approximately 1.5 times longer than wide, 2 longer than wide, 3 subquadrate, 4–5 longer than wide, 6–8 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. 1H). Hind wings fully developed. Meso- metathorax trapezoidal, longer than wide. Tergite IV with pair of transverse patches of microtrichia reaching middle. Median lobe of genitalia divided, apically bifurcate minor lobe longer than curved major lobe and bearing small tubercles (Fig. 3H). Phallobase symmetrical and rounded (Fig. 3H). Parameres asymmetrical, left paramere longer than right with setae extending from apices to bases (Fig. 3H).
Central Otago (CO), Dunedin (DN), Mid Canterbury (MC), Otago Lakes (OL), Westland (WD) (Fig. 5: white circles).
Specimens were collected using yellow pan traps, by sweeping, or by sifting forest litter.
- 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