Sagola parva, SHARP

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 : 41

6. parva species-group

(2 species)

Diagnosis. The members of parva group can be distinguished from other Sagola groups by the following combination of characters: body length 2.3–3.8 mm; antennomere 1 approximately 2.5 times longer than wide with dull surface, male antennomeres 5–6 enlarged ( Fig. 21e ); gular region of male head with round depression ( Fig. 21g ); hind wings well-developed; fore-femur with semicircular depression; abdominal tergites IV–VI with discal carinae; present on North Island, not known from South Island ( Fig. 22 ).

KEY TO SPECIES OF THE PARVA SPECIES- GROUP

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

1. Head bluntly triangular with large eyes ( Fig. 21a, f ); antennomeres 5–6 enlarged, without tubercles................. S. parva Sharp

1′. Head transverse with small eyes ( Fig. 21b ); antennomeres 4–6 enlarged, with distinctive tubercles ........................ S. denticollis Broun

Figures

Fig. 21. Sagola species in the parva species-group. Habitus, dorsal views: a) S. parva, b) S. denticollis. Aedeagi, dorsal views: c) S. parva, d) S. denticollis. S. parva, male: e) Antenna, f) Dorsal surface of head, g) Ventral surface of head. Scale bars a–b = 1 mm, c–g = 0.1 mm.

Fig. 22. Known collection localities of New Zealand Sagola species. S. parva: black circles; S. denticollis: triangles.