Tehran University of Medical Sciences Iranian Journal of Parasitology 1735-7020 16 3 2021 08 31 518 523 Sina Mohtasebi Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran Aref Teimouri Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran Mohammad Javad Abbaszadeh Afshar 1. Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran 2. Department of Medical Parasitology and Mycology, School of Medicine, Jiroft University of Medical Sciences, Jiroft, Iran Hamed Abbasian Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran Iraj Mobedi Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran Mahya Allahmoradi Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran Gholamreza Mowlavi Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran 2020 10 03 2021 08 31 Cestodes are important parasites that can affect the health of humans and wildlife. Among these, the genus Passerilepis is an important endoparasite of Passeriform birds while poorly studied in Iran. During a parasitological field survey in central parts of Iran in 2018, thirty-two cestodes, as an obstructive intertwined mass, recovered from the intestine of a recently dead Parus major (great tit). Morphological characteristics of recovered cestodes were drawn carefully by a camera lucida equipped microscope and identification was carried out using standard keys. All of the collected cestodes were identified as P. parina. In the current study, we recorded P. parina from great tit for the first time in Iran. https://ijpa.tums.ac.ir/index.php/ijpa/article/view/3111 https://ijpa.tums.ac.ir/index.php/ijpa/article/download/3111/1164