Sagola incisa, 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 : 47-48

8. incisa species-group

(3 species)

Diagnosis. The members of the incisa speciesgroup can be distinguished from other Sagola species-groups by the following combination of characters: body length 2.2–2.9 mm; antennomere 1 approximately 2.5 times longer than wide with dull surface; anterior frontal fovea oval, posterior frontal fovea elongate ( Fig. 25g ); frontal sulcus reaching length of vertexal fovea ( Fig. 25g ); gular region of male head with round depression with small process in middle ( Fig. 25h : arrow); hind wings well-developed; fore and mid-femur with semicircular depression; mid-tibia bent; male tergite IV with microtrichial patch covering most of the surface; abdominal tergites IV–VI with discal carinae; known from North Island and Three Kings Islands ( Fig. 26 ).

KEY TO SPECIES OF THE INCISA SPECIES- GROUP

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

1. Median lobe of genitalia much shorter than parameres, never reaching midpoint of paramere; parameres asymmetrical ( Fig. 25e ) ................ S. deformipes Broun

1′. Median lobe of genitalia shorter than parameres but exceeding midpoint of paramere; parameres symmetrical..........2

2(1′). Median lobe of genitalia reaching twothirds level of parameres, phallobase of genitalia rectangular ( Fig. 25d ); only known from Three Kings Islands ( Fig. 26 : black circles)................................................ .................... S. incisa Théry and Leschen

2.′ Median lobe of genitalia reaching almost apices of parameres, phallobase of genitalia round ( Fig. 25f ); only known from Northland ( Fig. 26 : black square)........................ .................... S. unuwhaoensis new species

Figures

Fig. 25. Sagola species in the incisa species-group.Habitus, dorsal views: a) S. incisa, b) S. deformipes, c) S. unuwhaoensis. Aedeagi, dorsal views: d) S. incisa, e) S. deformipes, f) S. unuwhaoensis. S. deformipes, male head: g) Dorsal surface, h) Ventral surface (arrow indicates round depression with anterior process). Scale bars a–c = 1 mm, d–h = 0.1 mm.

Fig. 26. Known collection localities of New Zealand Sagola species. S. incisa: black circle; S. deformipes: triangles; S. unuwhaoensis: black square.