Pseudoexeirarthra nomurai, 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 : 108-110

Taxon classification Animalia Coleoptera Staphylinidae

Pseudoexeirarthra nomurai sp. n. Figs 1J, 3J, 6

Type material.

Holotype. New Zealand: North Canterbury (NC): 1♂ (NZAC), aedeagus dissected and mounted in balsam on a clear plastic card, "NEW ZEALAND NC Arthur Pass Kellys Creek, 8 Nov 2005 R Leschen S Nomura", "ex litter RL1007 42°47'S 171°34'E ", "N.Z. Arthropod Collection, NZAC Private Bag 92170 AUCKLAND New Zealand", "HOLOTYPE Pseudoexeirarthra nomurai Park and Carlton des. 2013".

Etymology.

This species is named after Dr. Shûhei Nomura, co-collector of the holotype, world pselaphine beetle specialist, and an enthusiastic supporter of this study.

Diagnosis.

This species is distinguished from other species of this genus by the following combination of characters: body length 2.0 mm; eyes one-half length of temples (Fig. 1J); antennomeres 2-7 longer than wide, 8 subquadrate, 9-10 weakly transverse; median lobe of male genitalia divided with acute lateral spine at two-thirds length, major lobe subtruncate, minor lobe deeply bifurcate and with small tubercles (Fig. 3J); parameres nearly symmetrical, setae expending from apices to basal third (Fig. 3J).

Description of male.

Length 2.0 mm. Body reddish brown, antennae, legs, maxillary palpi and elytra paler (Fig. 1J). Head round, as long as wide, widest across eyes (Fig. 1J). Antennomere 1 approximately 1.5 times longer than wide, 2-7 longer than wide, 8 subquadrate, 9-10 weakly transverse. Eyes one-half length of temples. Prosternum as long as wide, widest at one-third length. Elytra longer than wide (Fig. 1J). Hind wings fully developed. Meso- metaventrites trapezoidal, longer than wide. Tergite IV with pair of transverse patches of microtrichia reaching middle. Median lobe of male genitalia divided with acute lateral spine at two-thirds length, major lobe subtruncate, minor lobe deeply bifurcate and with small tubercles (Fig. 3J). Phallobase symmetrical and rounded (Fig. 3J). Parameres nearly symmetrical, setae expending from apices to basal third (Fig. 3J).

Distribution.

North Canterbury (NC) (Fig. 6: black triangle).

Habitat.

The holotype was collected by sifting leaf litter.