Nornalup quadratus Park & Chandler

Park, Jong-Seok & Chandler, Donald S., 2017, Nornalup, a new genus of pselaphine beetle from southwestern Australia (Coleoptera, Staphylinidae, Pselaphinae, Faronitae), ZooKeys 695, pp. 111-121 : 116-118

Nornalup quadratus Park & Chandler sp. n. (Figs 1b, 2 c–d, 2h, 2k, 3 c–d, 4b, 4 f–g, 5)

Type material.

Holotype. Australia: Western Australia (WA): 1♂, aedeagus dissected and mounted in euparal on clear plastic card, "Australia: Western Australia: Avon Valley N.P., 1.3 km from entrance, 420m, 31°38.79'S, 116°17.94'E, 27 VII 2004, marris-jarrah ( Eucalyptus calophylla - E. marginata ) woodland; FMHD#2004-106, berl., leaf & log litter, A. Newton, D. Clarke, A. Solodovnikov 1102". Paratypes (n = 8; 4 males, 4 females). Australia: Western Australia: 2♂♂ 2♀♀ (1♂ 1♀ FMNH, 1♂ 1♀ CBNUIC, 1♀ slide mounted), Avon Valley N. P., 1.3 km from entrance, 420 m, 31°38.79'S, 116°17.94'E, 27 VII-13 VIII 2004, marris-jarrah ( Eucalyptus calophylla - E. marginata ) woodland, flight intercept trap, A. Newton & M. Thayer, FMHD#2004-103, 1102; 1♀ (FMNH, slide mounted), 27 VII 2004, berl., Banksia grandis litter, M. Thayer, FMHD#2004-105, 1102; 2♂♂ 1♀ (1♂ 1♀ WAM, 1♀ ANIC, 1♂ slide mounted), same as holotype.

Diagnosis.

This species can be distinguished from N. afoveatus sp. n. by the quadrate elytra (Fig. 1b), shorter body length (<2.0 mm, Fig. 1b), lack of a median metasternal fovea (Fig. 3d: arrow), and emarginate anterior margin of female abdominal sternite IX (Fig. 4b: arrow). This species is also separated from N. minusculus sp. n. by the quadrate elytra (Fig. 1b), lack of a median metasternal fovea (Fig. 3d: arrow), and the emarginate anterior margin of female abdominal sternite IX (Fig. 4b).

Description.

Length 1.1-1.5 mm (Fig. 1b). Head. Male antennomeres 1-2 longer than wide, 3 subquadrate, 4-6 longer than wide, 7-8 subquadrate, 9-10 weakly transverse (Fig. 2c). Female antennomeres 1-2 longer than wide, 3 subquadrate, 4-5 longer than wide, 6-8 subquadrate, 9-10 weakly transverse (Fig. 2d). Thorax. Elytra subquadrate (Fig. 1b). Hind wings reduced, half size of other species. Metaventrite without median metasternal fovea (Fig. 3d, arrow). Abdomen. Female abdominal sternite IX with emarginate anterior margin (Fig. 4b). Aedeagus. Apical lobe of median lobe divided into two lobes as U-shape (Fig. 4f).

Distribution.

Western Australia (Fig. 5: triangle).

Habitat.

Specimens of this species were collected using flight intercept traps, or by sifting leaf, log, or Banksia grandis litter in Eucalyptus forests.

Comments.

Both sexes of this species have the hind wings approximately half normal size when compared to the other species. However, four specimens were collected by flight intercept trap, so we speculate that this species still has the ability to fly.