Stenosagola egmontensis Park and Carlton

Park, J. - S. & Carlton, C. E., 2013, A Revision of the New Zealand GenusStenosagolaBroun, 1921 (Coleoptera: Staphylinidae: Pselaphinae: Faronitae), The Coleopterists Bulletin 67 (3), pp. 335-359 : 344

Stenosagola egmontensis Park and Carlton , new species

Type Material. Holotype. NEW ZEALAND: TARANAKI (TK): ♂ (wingless male), aedeagus dissected and mounted in balsam on a clear plastic card, “ NEW ZEALAND TK Pouakai Saddle 1220m Pouakai Ra 3 Dec 1975, J.S. Dugdale ”, “Litter 75/204”, “ N.Z. Arthropod Collection, NZAC Private Bag 92170 AUCKLAND New Zealand”, “ HOLOTYPE Stenosagola egmontensis Park and Carlton des. 2013” . Paratypes (n = 5: 2 males, 3 females). NEW ZEALAND: NELSON (TK): 2♂♂ 3♀♀ (1♂ 1♀, slide-mounted), same data as holotype ( NZAC) .

Etymology. This species is named after the type locality, Egmont National Park, Taranaki (TK).

Diagnosis. Specimens of S. egmontensis are similar in appearance to those of S. stewartensis but can be distinguished by the shape of the male genitalia ( Fig. 4c ) and the depression of the basodorsal margin of the male profemur ( Fig. 4g , arrow). Members of this species can be separated from those of S. gracilis , S. pseudogracilis , S. clarkei , S. ramsayi , S. domettensis , and S. eylesi by the dull dorsal surface of the head ( Figs. 1h–i ).

Description. Length 1.5–1.6 mm ( Fig. 1h–i ). Head: Wingless male head approximately 1.24 times, female 1.19 times longer than wide ( Fig. 4e ). Wingless male eye approximately 0.80 times, female 0.65 times as long as temple ( Fig. 4e ). Wingless male antennomere 3 subquadrate, 4–5 slightly longer than wide, 6–7 subquadrate. Female antennomere 3 subquadrate, 4 slightly longer than wide, 5–7 subquadrate. Thorax: Pronotum subquadrate, approximately 0.90 times longer than wide ( Fig. 4f ). Wingless male elytra approximately 1.59 times, female 1.45 times longer than pronotum. Wingless male meso- and metaventrites trapezoidal, approximately 1.41 times, female 1.30 times longer than pronotum. Basodorsal margin of male profemur concave ( Fig. 4g , arrow). Aedeagus: Left apical lobe of male genitalia acute, longer than right apical lobe, right apical lobe folded over left ( Fig. 4c ). Left paramere slightly longer than right, setae present anteriorly ( Fig. 4c ).

Distribution. Taranaki (TK), New Zealand ( Fig. 5 , black circle).

Habitat. Specimens of this species were collected by sifting leaf litter.

Figures

Fig. 4. Stenosagola species. a) S. pseudogracilis, aedeagus, dorsal view, b) S. clarkei, aedeagus, dorsal view, c) S. egmontensis, aedeagus, dorsal view, d) S. ramsayi, e) S. egmontensis, winged male head, dorsal view; f) S. egmontensis, prothorax, ventral view; g) S. egmontensis, prothoracic leg, h) S. domettensis, aedeagus, dorsal view, i) S. eylesi, aedeagus, dorsal view, j) S. stewartensis, aedeagus, dorsal view. Scale bars = 0.1 mm.

Fig. 1. Habitus of Stenosagola species, dorsal view. a) Winged male of S. gracilis, b) Wingless male of S. gracilis, c) Female of S. gracilis, d) Winged male of S. pseudogracilis, e) Wingless male of S. pseudogracilis, f) Female of S. pseudogracilis, g) Wingless male of S. clarkei, h) Wingless male of S. egmontensis, i) Female of S. egmontensis, j) Winged male of S. ramsayi, k) Wingless male of S. ramsayi, l) Female of S. ramsayi, m) Wingless male of S. domettensis, n) Female of S. domettensis, o) Wingless male of S. eylesi, p) Wingless male of S. stewartensis. Scale bars = 1 mm.

Fig. 5. Locations where Stenosagola clarkei (black triangle), Stenosagola egmontensis (Black circle), Stenosagola ramsayi (black squares), Stenosagola domettensis (white circle), Stenosagola eylesi (star), and Stenosagola stewartensis (white square) have been collected in New Zealand.