In order to identify free-living nematodes in East Azarbaijan province, several soil samples were collected from rhizosphere of the vegetations at different areas during 2016 and 2017. The nematodes were extracted using classic nematology techniques, and fixed and transferred to pure glycerin. Microscopic slides from the nematodes were prepared and the nematodes identified based on morphological and morphometric characteristics. Using the Identification key provided by Pena Santiago and Sibano (2008) and other related publications As a result, three species, Crassolabium saccatum, Crassolabium ettersbergense and Crassolabium himalum from Arasbaran forests and Crassolabium pumilum from Roodghat– Sufiyan were identified, which are new reports for Iran nematode fauna.
