Stenus crassus Stephens, 1833

Serri, Sayeh & Frisch, Johannes, 2016, Species diversity, chorology, and biogeography of the Steninae MacLeay, 1825 of Iran, with comparative notes on Scopaeus Erichson, 1839 (Coleoptera, Staphylinidae), Deutsche Entomologische Zeitschrift 63 (1), pp. 17-44 : 22

Stenus crassus Stephens, 1833 Fig. 11 , Suppl. material 1

Chorology.

Stenus crassus is widely distributed across the temperate and northern West Palaearctic eastwards to Russia, Kazakhstan, and Mongolia ( Kastcheev and Puthz 2011: 443). The species reaches its southernmost limit of distribution in the very north of western Iran (Fig. 11 ). In view of this distribution pattern, the record by Ghahari et al. (2009a: 1954) from Kaleybar in East Azarbaijan, which is the first record for Iran, can be correct.

Biogeographical characterization.

The distribution pattern of Stenus crassus cannot be explained by the theory of Pleistocene refuges.

Figures

Figures 7 - 12. Distribution of Steninae in Iran. 7. Stenus circularis species group: ○ Stenus planifrons robustus; 8. Stenus clavicornis species group: ○ Stenus caspius, ● Stenus providus providus; 9. Stenus comma species group: ■ Stenus aereus, ○ Stenus asiaticus, ● Stenus bicornis, ▲ Stenus biguttatus, □ Stenus comma comma; 10. Stenus cordatus species group: ○ Stenus araxis, ● Stenus turk; 11. Stenus crassus and Stenus fornicatus species groups: ■ Stenus crassus, △ Stenus formicetorum, ○ Stenus fornicatus; 12. Stenus glacialis species group: ➕ Stenus armeniacus, ▲ Stenus hospes, ■ Stenus limicola, ○ Stenus medus, ▲ Stenus parcior, □ Stenus persicus, ● Stenus schah.