Diglotta, Champion, 1899

Klimaszewski, Jan, Webster, Reginald, Assing, Volker & Savard, Karine, 2008, Diglotta mersa (Haliday) and Halobrecta flavipes Thomson, two new species for the Canadian fauna (Coleoptera, Staphylinidae, Aleocharinae), ZooKeys 2 (2), pp. 175-188 : 178-180

Key to the Diglotta species recorded from the Nearctic region

The following key was modified from Haghebaert (1991). Elytral length was measured from the humeral angle to the hind margin; body length was measured from the apical margin of the labrum to the apex of the abdomen. Th e body length is given without range for species known only from a holotype ( D. littoralis ), or where such data was not available from the literature. For descriptions and genital illustrations of D. legneri , D. littoralis and D. pacifica see Haghebaert (1991).

1. Metatarsus with 4 articles (tarsal formula 4-4-4); elytra at least as long as pronotum; Atlantic coast of Canada............. D. mersa (Haliday) [ Figs. 1-11 ]

– Metatarsus with 5 articles (tarsal formula 4-4-5); elytra shorter than pronotum; Atlantic or Pacific coast of North America..........................................2

2. Body brownish, length 2.6 mm; antennae elongate; Pacific coast.................. .............................................................................. D. legneri Moore & Orth

– Body brown to light testaceous, length less than 2.0 mm; antennae short; Atlantic or Pacific coast............................................................................... 3

3. Head slightly broader than long; punctation finely asperate; colour light testaceous; body length 1.8 mm; Atlantic coast................ D. littoralis (Horn)

– Head one third broader than long, punctation coarse and dense; colour brownish; body length 1.5 mm; Pacific coast ..................... D. pacifica Fenyes

Figures

Fig. 1. Diglotta mersa (Haliday) in dorsal view. Scale bar = 1 mm.

Figs. 2-12. Diglotta mersa (Haliday): 2, median lobe of aedeagus in lateral view (New Brunswick); 3, median lobe of aedeagus in lateral view (Europe); 4, paramere (New Brunswick); 5, male tergite 8 (New Brunswick); 6, male sternite 8 (New Brunswick); 7, female tergite 8 (New Brunswick); 8, female sternite 8 (New Brunswick); 9, spermatheca (New Brunswick); 10, spermatheca (Europe); 11, metatarsus with 4 articles (New Brunswick); 12, median lobe of the aedeagus of the holotype of D. littoralis in lateral view. Scale bars = 0.1 mm.