Sagola arboricola, 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 : 71-72

16. arboricola species-group

(2 species)

Diagnosis. Members of the arboricola speciesgroup can be distinguished from other Sagola species-groups by the following combination of characters: body length 2.3–3.0 mm; antennomere 1 approximately 1.5 times longer than wide; frontal sulcus deep reaching one-third length of eye; anterior frontal fovea oval, posterior frontal fovea round ( Fig. 41e ); eye large and prominent, approximately as long as temple ( Fig. 41e ); ventral surface of male head with process bearing dense setae behind mouthparts ( Fig. 41f ); hind wings well-developed; abdominal tergites IV–VI with discal carinae.

KEY TO SPECIES OF THE ARBORICOLA SPECIES- GROUP

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

1. Body length 2.3–2.7 mm; antennomeres 2–10 with distinct tubercles; ventral surface of head with inverted triangular process bearing dense setae behind mouthparts ( Fig. 41f ); abdominal ventrite VII with round depression medially ................................... S. arboricola Broun

1′. Larger body, length 2.5–3.0 mm; ventral surface of head with blunt process bearing dense setae behind mouthparts; antennomeres 2–10 subquadrate and weakly enlarged; abdominal ventrite VII simple ........... S. tenebrica Broun

Figures

Fig. 41. Sagola species in the arboricola species-group, Habitus, dorsal views: a) S. arboricola, b) S. tenebrica. Aedeagi, dorsal views: c) S. arboricola, d) S. tenebrica. S. arboricola, male head: e) Dorsal surface, f) Ventral surface. Scale bars a–b = 1 mm, c–f = 0.1 mm.