Sagola rugifrons, Broun Desig. Park and Carlton, 2013

Park, J. - S. & Carlton, C. E., 2014, A revision of the New Zealand species of the genus Sagola Sharp (Coleoptera: Staphylinidae: Pselaphinae: Faronitae), The Coleopterists Bulletin (mo 13) 68, pp. 1-156 : 19-21

2. rugifrons species-group

(4 species)

Diagnosis. The members of the rugifrons species-group can be distinguished from other Sagola species-groups by the following combination of characters: body length 2.1–3.4 mm; antennomere 1 at least 2 times longer than wide with dull surface; gular region of male head with bean-shaped opening and transversely open inside ( Fig. 8j : arrow); ventral surface of male head with pair of short carinae from posterior margin of eyes, as long as eye ( Fig. 8j ); male fore femur with semicircular depression; male mid-femur with shallow depression; male mid-tibia bent; abdominal tergites IV–VI with discal carinae; present on North Island, not known from South Island ( Figs. 9–10 ).

KEY TO SPECIES OF THE RUGIFRONS SPECIES- GROUP

The key is based on male specimens because most female specimens are indistinguishable based on external morphology.

1. Body large, length 3.0– 3.4 mm; head weakly transverse; frontal rostrum with distinctive punctures; densely setose around posterior frontal fovea.................................. ................................ S. brouni new species

1′. Body smaller, length 2.1–2.6 mm; head as long as wide; not densely setose around posterior frontal fovea; frontal rostrum without punctures .................................... 2

2(1′). Antennomeres 4–8 longer than wide; major process of median lobe of genitalia slender .................................................................... 3

2′. Antennomeres 4–8 subquadrate; major process of median lobe of genitalia broad and rectangular ( Fig. 8h ) .................................... ......................... S. plentyensis new species

3(2). Apical major process of median lobe of genitalia arrowhead-shaped ( Fig. 8b )........ ................... S. waipouaensis new species

3′. Apical major process of median lobe of genitalia triangular ( Fig. 8a )...................... ................................... S. rugifrons Broun

Figures

Fig. 8. Sagola species in the rugifrons species-group. Habitus, dorsal views: a) Sagola rugifrons, b) S. waipouaensis, c) S. brouni, d) S. plentyensis. Aedeagi, dorsal views: e) S. rugifrons, f) S. waipouaensis, g) S. brouni, h) S. plentyensis. S. waipouaensis, male head: i) Dorsal surface, j) Ventral surface (arrow indicates bean-shaped opening). Scale bars a–d = 1 mm, e–j = 0.1 mm.

Fig. 9. Known collection localities of Sagola rugifrons

Fig. 10. Known collection localities of New Zealand Sagola species. S. waipouaensis: black circles; S. brouni: triangles; S. plentyensis: black squares.