Pseudoexeirarthra youngboki, Park, Jong-Seok & Carlton, Christopher E., 2015

Park, Jong-Seok & Carlton, Christopher E., 2015, Pseudoexeirarthra, a new genus from New Zealand (Coleoptera, Staphylinidae, Pselaphinae), with descriptions of seven new species, ZooKeys 491, pp. 95-118 : 105

Taxon classification Animalia Coleoptera Staphylinidae

Pseudoexeirarthra youngboki sp. n. Figs 1F, 3F, 5

Type material.

Holotype. New Zealand: Mid Canterbury (MC): 1♂ (NZAC), aedeagus dissected and mounted in balsam on a clear plastic card, "NEW ZEALAND: MC: Banks Peninsula, Ahuriri Scen. Res., 450m, 43°39.971'S, 172°37.427'E, 3 XII 2005, mixed broadleaf w/emergent podocarp; FMHD#2005-069, berl., leaf & log litter, A. Newton, M. Thayer & A. Solodovnikov; ANMT site 1162", "HOLOTYPE Pseudoexeirarthra youngboki Park and Carlton des. 2013". Paratypes (n = 18; 8 males, 10 females): New Zealand: Mid Canterbury (MC): 6♂♂ 6♀♀, same data as holotype (FMHD); 1♂, Banks Peninsula, Ahuriri SR, 450 m, 43°39.971'S, 172°37.427'E, 3-6 XII 2005, mixed broadleaf w/emergent podocarp, FMHD#2005-069, FIT, A. Newton, M. Thayer, ANMT site 1162 (FMHD); 4♀♀, Bank Peninsula, Mt. Sinclair SR, 775 m, 43°42.977'S, 172°51.098'E, 3-16 XII 2005, ridgetop mixed broadleaf w/emergent Podocarpus tatara , FMHD#2005-070, FIT, A. Newton, M. Thayer, ANMT site 1163 (FMNH); 1♂, Prices Valley, 3-24 IV 1981, J. W. Early, yellow pan trap (LUNZ).

Etymology.

This species is named after Dr. Young Bok Cho, curator of Natural History Museum of Hannam University (Daejeon, South Korea), carrion and rove beetles specialist, and an enthusiastic supporter of this study.

Diagnosis.

This species is distinguished from the other species of this genus by the following combination of characters: body length 1.9-2.2 mm; eyes large, two-thirds lengths of temples (Fig. 1F); antennomeres 2-8 longer than wide, 9-10 weakly transverse; median lobe of male genitalia divided, apex of major lobe rectangular, minor lobe thin, longer than major lobe and bearing small tubercles (Fig. 3F); parameres symmetrical, but right slightly longer than left with setae from before midpoint apices (Fig. 3F).

Description.

Length 1.9-2.2 mm. Body reddish brown, antennae, legs, maxillary palpi and elytra paler (Fig. 1F). Head round, as long as wide, widest across eyes (Fig. 1F). Antennomere 1 approximately 1.5 times longer than wide, 2-8 longer than wide, 9-10 weakly transverse. Eyes large and prominent, two-thirds length of temples. Prosternum as long as wide, widest at one-third length. Elytra longer than wide (Fig. 1F). 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, apex of major lobe rectangular, minor thin, lobe longer than major lobe and bearing small tubercles (Fig. 3F). Phallobase symmetrical and rounded (Fig. 3F). Parameres nearly symmetrical, with right slightly longer than left, with setae extending from apices to anterior to midpoints (Fig. 3F).

Distribution.

Mid Canterbury (MC) (Fig. 5: black square).

Habitat.

Specimens were collected using flight intercept or yellow pan traps, or by sifting moss and leaf litter in broadleaf and podocarp forests.