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In order to extend the work on Iranian Collembolan fauna, several samplings from leaf litter and soils conducted in Ilam province (west of Iran). Specimens were collected from different localities and extracted by Berlese funnels. Results from the study lead to identification of 11 species of five families: Onychiuridae (with two genera and two species), Tullbergiidae (with one genus and one species), Hypogastruridae (with one genus and one species), Isotomidae (with four genera and four species) and Entomobryidae (with one genus and one species). Sminthurus muscicolus Betsch, 1977 from Sminthuridae was new for Iranian fauna. All species from the present study reported for the first time from Ilam province. Short explanation of each collected species including the material studied, a distribution and a short description for the new record and some illustrations are given.

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The focus of this study was to extend investigations on Collembola fauna in parts of Hyrcanian forests - Hezarjirib forests, located near Neka in Mazandaran province. For this, irregular samplings from leaf litter and soil in different localities were done during 2020–2021. The springtail specimens were extracted by Berlese funnel and after permanent slide mounting identified by relevant taxonomic keys. It resulted in the identification of 25 species belonging to eight families and 19 genera. Three species including Hypogastrura papillata Gisin, 1949 (Hypogastruridae), Lepidocyrtus bicoloris Mateos, 2012 (Entomobryidae) and Folsomia trisetata Jordana & Ardanaz, 1981 (Isotomidae) were recorded for the first time from Iran. Brief information for each species including the material studied, distribution and some illustrations of the new records are given.

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The study was conducted in oak forests and the conifer stands in Marivan county located in west of Kurdistan province. The leaf litter and soils samples from these forests were taken during 2016 to 2019 and specimens were extracted by the Berlese funnels. Results of the study led to identification of 39 species of 11 families. The three genera Doutnacia Rusek, 1974 (Tullbergiidae), Heterosminthurus Stach, 1955 (Bourletiellidae) and Calx Christiansen, 1958 (Entomobryidae) and eight species including Willemia virae Kapruś, 1997, Xenylla tullbergi Börner, 1903 (Hypogastruridae), Axenyllodes caecus (Gisin, 1952) (Odontellidae), Thalassaphorura franzi (Stach, 1946) (Onychiuridae), Doutnacia xerophila Rusek, 1974 (Tullbergiidae), Calx kailashi Mandal, 2018, Seira dori Gruia, Poliakov & Broza, 2000 (Entomobryidae) and Heterosminthurus insignis (Reuter, 1876) (Bourletiellidae) are new for Iranian fauna. All species from the present study are reported for the first time from Kurdistan province. Short explanation of each collected species including material examined, distribution and short description and illustration for the new records are given.