During study on soil mesofauna in Choqa Sabz Forest and Dalab Protected Area in Ilam Province (western
Iran), the following pseudoscorpions belonging to four families were collected and identified: Chthonius
(Chthonius) shelkovnikoviRedikorzev, 1930, Chthonius(Ephippiochthonius) negarinaeNassirkhani
and Vafai, 2015, Paramenthus nanusMahnert, 2007, Cardiolpium asiaticum(Dashdamirov, 1990), and
Acanthocreagris iranicaBeier, in Mahnert 1976. All of these species are new to the fauna of western Iran.
In this survey, the adults of A. iranicacollected from Ilam and Lorestan Provinces are redescribed and
figured. Additionally, its tritonymph and deutonymph are briefly described
