Eupines (Byraxis) lewisi Broun 1910
Creators: name: Shen, Jia-Wei
name: Leschen, Richard A. B.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Eupines
Eupines lewisi

description: Eupines (Byraxis) lewisi Broun, 1910
Fig. 29; map Fig. 52
Eupines lewisi Broun, 1910: 24. Raffray 1911: 83, 1924: 157; Hudson 1923: 364 and 367, 1934: 183 and 185.
Eupines (Byraxis) lewisi: subgeneric assignment by Nomura and Leschen 2006: 255. Maddison 2010: 417; Shen and Leschen 2019: 268.
Type locality: [MC] Broken River, Canterbury.
Type depository: BMNH HT ♂
Diagnosis: Head with vertexal foveae punctiform; antennae 10-segmented with 2-segmented antennal club; A4, A6, A7, A8 and A10 unmodified, A5 large and asymmetrical, bean-shaped, lateral margin laminate and curved, forming bowl-shaped excavation, A7 asymmetrical, A8 disc-shaped, A9 large and asymmetrical, slightly shorter than A10, inner side strongly excavated in dorsal view, with upper margin laminate and extended, forming gulfshaped structure, A10 largest and conical, about 1.2 × longer than A9. Abdominal ventrite 2 with pair of large discal protuberances slightly curving towards each other, inserted with strongly curved small apical setae; ventrite 6 with pair of short and acute median struts, about one-fourth of ventral length. Legs with protrochanters modified with small ventral spine, about one-third of protrochanteral width; protibiae and mesotibiae unmodified. Protrochanters with small ventral spine, about one-third of protrochanteral width; protibiae and mesotibiae unmodified.
Redescription: Body length 1.58–1.60 mm; body colour dark brown with lighter coloured legs. Head about as long as wide, frons slightly narrowed at end, about half width of head at eye level; eyes moderately developed, with about 29 facets; vertexal foveae punctiform; antennal tubercles weak; lacking postantennal notches; postantennal cavities medium-sized, about half length of antennal tubercles in dorsal view; antennae 10-segmented with 2-segmented antennal club; A4, A6, A7, A8 and A10 unmodified, A5 large and asymmetrical, bean-shaped, lateral margin laminate and curved, forming bowl-shaped excavation, A7 asymmetrical, A8 disc-shaped, A9 large and asymmetrical, slightly shorter than A10, inner side strongly excavated in dorsal view, with upper margin laminate and extended, forming gulf-shaped structure, A10 largest and conical, about 1.2 × longer than A9. Pronotum about as long as wide, wider than head at eye level; lacking lateral antebasal foveae. Elytra as long as wide, widest at apical two-thirds; humeral calli distinctively prominent; sutural stria distinctively extending from base to apex. Abdomen with tergite 1 about 1.8 × longer than tergite 2; ventrite 2 with pair of large discal protuberances slightly curving towards each other, inserted with strongly curved small apical setae; ventrite 6 with pair of short and acute median struts, about one-fourth of ventral length. Legs with protrochanters modified with small ventral spine, about one-third of protrochanteral width; protibiae and mesotibiae unmodified. Aedeagus about 0.32 mm long, with sinuate parameres long and stout, widest near basal one-fourth, apex strongly bent downwards and twisted in lateral view, with three short apical setae; median lobe with two short sclerites, much shorter and narrower than parameres in dorsal view, left one distinctively curved outwards, right one point inwards.
Comments: The special antennal modifications (Figs. 29 B–D) can easily separate this species from all congeners.
Distribution: North Island. BP. South Island. NN, MC.
Additional material examined: 5 ♂♂, BP: 2, BMNH, 3052. ♂, Rotoiti, 10/3/16, New Zealand, Broun Col- lection. Brit. Mus., 1922–482; NN: 2, FMNH, Nelson Lakes N.P., N. slope Mt. Robert, Pinchgut Track, 950 m, 14/ XII/84–6/I/85, Nothofagus spp. forest, A. Newton /M. Thayer, 707, flight intercept (window) trap; MC: 1, BMNH, 3052, ♂, Rakaia, 9/8/1912, New Zealand, Broun Collection. Brit. Mus., 1922–482.
description: Published as part of Shen, Jia-Wei & Leschen, Richard A. B., 2020, Revision of Eupines King of New Zealand (Coleoptera: Staphylinidae: Pselaphinae: Goniaceritae), pp. 1-84 in Zootaxa 4777 (1) on pages 46-47, DOI: 10.11646/zootaxa.4777.1.1, http://zenodo.org/record/3821174