Notes on Atractothrombium and Fissitrombium (Acari: Trombidiformes: Microtrombidiidae) with description of a new species of Atractothrombium from Iran.

Atractothrombium joharchii sp. nov. ectoparasitic on an unknown Tachinidae (Insecta: Diptera) is described from Alborz province, Iran. A re-definition of the genus Atractothrombium is presented. A key to the larval genera of Microtrombidiinae of the world with two median scuta and anterior scutum with longitudinal striations is given. Leg setal formula of two species of Fissitrombium described by Southcott (1994) are given. [ABSTRACT FROM AUTHOR]