Halobrecta

Gusarov, Vladimir I., 2004, A revision of the Nearctic species of the genus Halobrecta Thomson, 1858 (Coleoptera: Staphylinidae: Aleocharinae) with notes on some Palaearctic species of the genus, Zootaxa 746, pp. 1-25 : 8

Key to Nearctic species of Halobrecta

1 Males: spatuliform apex of median lobe (in parameral view) smaller, 1.1 times as wide as median lobe measured subapically at its narrowest point ( Figs. 22–23, 26–27 ). Body length 3.0– 3.9 mm, pronotal length 0.49–0.57 mm. Distributed along the Pacific coast of North America (California) ( Fig. 66 ). Also known from Europe, Chile, New Zealand and Inaccessible Island of the Tristan da Cunha archipelago ........ ..................................................................................................1. H. algophila (Fenyes)

– Males: spatuliform apex of median lobe (in parameral view) larger, 1.4–1.6 times as wide as median lobe measured subapically at its narrowest point ( Figs. 41–44 ). Body length 2.9–3.2 mm, pronotal length 0.43–0.51 mm. Distributed along the Atlantic coast of North America (Virginia, New York) ( Fig. 66 ). Also known from Europe and Chile.........................................................................................2. H. flavipes Thomson

Figures

FIGURE 66. Geographical distribution of Halobrecta algophila (Fenyes) and Ha. flavipes Thomson in North America.

FIGURES 22 – 29. Aedeagus of Halobrecta algophila (Fenyes) (male lectotype of At. algophila (22 – 25), and male from the environs of Bolinas, California (26 – 29 )). 22, 27 — apex of median lobe, parameral view; 23, 26 — apex of median lobe, parameral view; 25, 28 — median lobe, lateral view; 24, 29 — apex of median lobe, lateral view. Scale bar 0.1 mm (22, 24, 27, 29), 0.2 mm (23, 25, 26, 28).

FIGURES 41 – 44. Aedeagus of Halobrecta flavipes Thomson (male from Oskarshamn, Sweden (41 – 42), and male paralectotype of Atheta pocahontas Casey (43 – 44 )). 41, 43 — median lobe, parameral view; 42, 44 — apex of median lobe, parameral view. Scale bar 0.1 mm (42, 44), 0.2 mm (41, 43).