Sagola excavata, Broun, 1886

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 : 94

23. excavata species-group

(2 species)

Diagnosis. Members of excavata species-group can be distinguished from other Sagola speciesgroups by the following combination of characters: body small, length 1.9–2.9 mm; frontal sulcus deep and reaching vertexal fovea ( Fig. 54e ); anterior frontal fovea round and partially covered by frontal rostrum, posterior frontal fovea keyholeshaped ( Fig. 54e ); hind wings fully developed; abdominal tergites IV–VI with discal carinae; Male tergite V distinctly depressed, with processes from anterior and posterior edge with long and dense setae between processes ( Fig. 54a–b, f ); only known from North Island ( Fig. 55 ).

KEY TO SPECIES OF THE EXCAVATA SPECIES- GROUP

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

1. Larger size, length 2.5–2.9 mm; abdominal tergite V distinctly depressed with triangular processes from anterior and posterior margins ( Fig. 54f )......................... S. excavata Broun

1′. Smaller size, length 1.9–2.2 mm; abdominal tergite V distinctly depressed with rectangular processes from anterior and posterior margins ............ S. aucklandensis new species

Figures

Fig. 54. Sagola species in the excavata species-group. Habitus, dorsal views: a) S. excavata, b) S. aucklandensis. Aedeagi, dorsal views: c) S. excavata, d) S. aucklandensis. S. excavata, male: e) Dorsal surface of head, f) Abdominal tergite V, dorsal view. Scale bars a–b = 1 mm, c–f = 0.1 mm.

Fig. 55. Known collection localities of New Zealand Sagola species. S. excavata: black circles; S. aucklandensis: triangle.