Stenosagola stewartensis 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 : 346

Stenosagola stewartensis Park and Carlton , new species

Type Material. Holotype. NEW ZEALAND: STEWART ISLAND (SI): ♂ (wingless male, slide-mounted), “New Zealand: SI: Bigs Cape I, S Peak, 250′ 11 XI 1968, J. McBurney Litter 68/185 ”, “ HOLOTYPE Stenosagola stewartensis Park and Carlton des. 2013”.

Etymology. This species is named after the type locality, Stewart Island (SI).

Diagnosis. Specimens of S. stewartensis are similar in appearance to those of S. egmontensis but can be distinguished by the shape of the male genitalia ( Fig. 4j ). Members of this species can be separated those of S. gracilis , S. pseudogracilis , S. clarkei , S. ramsayi , S. domettensis , and S. eylesi by the dull dorsal surface of the head ( Fig. 1p ).

Description. Length 1.7 mm ( Fig. 1p ). Head: Wingless male head approximately 1.13 times longer than wide, eye 0.89 times longer than temple. Wingless male antennomere 3–5 subquadrate, 6–7 slightly transverse. Thorax: Pronotum approximately 0.92 times longer than wide. Wingless male elytra approximately 1.43 times longer than pronotum. Wingless male meso- and metaventrites trapezoidal, approximately 1.27 longer than pronotum. Aedeagus: Apical lobe of male genitalia with two branches; main lobe bifid apically, minor lobe divided from ventral base of main lobe, longer and narrower ( Fig. 4j ). Left paramere slightly broader than right, setae present at tip and middle ( Fig. 4j ).

Distribution. Stewart Island (SI), New Zealand ( Fig. 5 , white square).

Habitat. The unique holotype was 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.