Eupines (Byraxis) waikaremoana, Shen & Leschen, 2020

Shen, Jia-Wei & Leschen, Richard A. B., 2020, Revision of Eupines King of New Zealand (Coleoptera: Staphylinidae: Pselaphinae: Goniaceritae), Zootaxa 4777 (1), pp. 1-84 : 70-72

Eupines (Byraxis) waikaremoana sp. nov.

Fig. 46 ; map Fig. 54

Diagnosis: Head with vertexal foveae punctiform; antennae 10-segmented with 2-segmented antennal club; A4, A5, A6, A7, A8 and A10 unmodified, A8 slightly shorter than A7, A9 reversed cone-shaped, slightly asymmetrical, with apical spine at ventral side, A10 conical and slightly longer than A9. Abdominal ventrite 2 with pair of min- ute discal protuberances, inserted with strongly curved minute apical setae; ventrite 6 with pair of long and acute median struts, about half of ventral length. Protrochanters with long and acute ventral spine, about three-fourths of protrochanteral width; protibiae and mesotibiae unmodified.

Description: Body length 1.91 mm; body colour reddish brown with lighter coloured tibiae and tarsi. Head longer than wide; frons not narrowed at end, about three-fourths width of head at eye level; eyes moderately developed, slightly prominent in dorsal view, with about 27 facets; vertexal foveae punctiform; antennal tubercles weakly developed; lacking postantennal notches; postantennal cavities large, slightly shorter than antennal tubercles in dorsal view; antennae 10-segmented with 2-segmented antennal club; A4, A5, A6, A7, A8 and A10 unmodified, A8 slightly shorter than A7, A9 reversed cone-shaped, slightly asymmetrical, with apical spine at ventral side, A10 conical and slightly longer than A9. Pronotum longer than wide, about as wide as head at eye level; lacking lateral antebasal foveae. Elytra slightly longer than wide, widest near middle; humeral calli weak, slightly prominent in dorsal view; sutural stria barely visible. Abdomen with tergite 1 about 1.3 × longer than tergite 2; ventrite 2 with pair of minute discal protuberances, inserted with strongly curved minute apical setae; ventrite 6 with pair of long and acute median struts, about half of ventral length. Legs with protrochanters modified with long and acute ventral spine, about three-fourths of protrochanteral width; protibiae and mesotibiae unmodified. Aedeagus about 0.36 mm long, with slender parameres curved towards each other at apex, apex bent downwards in lateral view, with five pairs of long apical setae; median lobe with two large sclerites, curved towards each other at apex, widest near middle, right one longer and much wider than left one in dorsal view.

Comments: This species is most similar to E. (B.) carinata by sharing the large body size (average length around 2.00 mm) but can be separated by having A10 unmodified ( Fig. 46B ). Distribution : North Island. GB. Etymology: This species is named after the holotype locality. Type material ( NZAC): Holotype. ♂, specimen entire, glued on point, aedeagus + proleg on acetate card: “GB, L. Waikaremoana, 19 Nov 1975, G. Kuschel [in hand]”.

Figures

FIGURE 46. Diagnostic characters of E. (B.) waikaremoana sp. n. A) Habitus. B) Antenna, in dorsal view. C) Same, in lateral view. D) Protrochanter. E) Ventrite 2. F) Ventrite 6. G) Aedeagus, in dorsal view. H) Same, in lateral view. I) Same, in ventral view. Scale bars: A = 1 mm, B–E = 0.2 mm, F–I = 0.1 mm.

FIGURE 54. Geographic distributions of E. (B.) pannicula sp. n., E. (B.) petila sp. n., E. (B.) platyarthra (Broun, 1893), E. (B.) protibialis sp. n., E. (B.) setifera (Broun, 1893), E. (B.) waikaremoana sp. n., E. (B.) whirinaki sp. n. and E. (B.) undecim sp. n. in New Zealand.