First Records of Podonominae (Diptera: Chironomidae) from Outer Mongolia, with Notes on Ecology and Biogeographic Distribution

摘要

Paraboreochlus minutissimus (Strobl 1894) and Trichotanypus posticalis (Lund-beck 1898) have been collected from Gorkhi Terelj, Outer Mongolia resulting in the first record for these species and for the subfamily Podonominae (Diptera: Chironomidae) in this country. Both species were collected in habitats similar to their described habitats from Europe and North America. A review of their biogeography indicates that Trichotanypus are restricted to the more northern part of the Holarctic region and will likely be restricted to northern Mongolia; whereas Paraboroechlus has a more southern Holarctic distribution and future surveys may result in finding it in southern Mongolia, just north of the Gobi Desert.