Acarological Society of Iran Persian Journal of Acarology 2251-8169 11 4 2025 12 01 First data on themites (Mesostigmata,Oribatida) fromsea debris of the Caspian Sea(Dagestan coast, Russia) 633 642 238479 10.22073/pja.v11i4.76279 EN Olga Makarova Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow, Russia Sergey G. Ermilov Institute of Environmental and Agricultural Biology (X-BIO), Tyumen State University, Tyumen, Russia 0000-0002-0913-131X Journal Article Mites in seaweeds from two distant sites of the Dagestan State Nature Reserve, namely from the Kizlyar Bay and Samoor Forest, were studied. Total of 31 species of mesostigmatic mites (Acari: Mesostigmata) and 31 species of oribatid mites (Acari: Oribatida) were collected and identified. The other mites (Astigmata, Prostigmata, and Endeostigmata) belong to 19 families. One species of gamasid mites [<em>Gamasellodes vulgatior </em>(Athias-Henriot, 1961)] and two species of oribatids [<em>Austrophthiracarus</em> cf. <em>duplex</em> (Mahunka & Mahunka-Papp, 2010); <em>Xenillus moyae </em>Pérez-Íñigo & Peña, 1994] are recorded from Russia for the first time. Among 62 identified species, 28 (including the majority of Mesostigmata) were not previously recorded in Dagestan. The faunistic similarity of species lists from two sites was only 13.1% (Jaccard's coefficient). The input of broadly hydrophilic mite species (15% of the total list) is noticeable. However, no characteristic halophilic (littoral) species were found. Most likely, this is due to the absence of marine macrophytes (and their emissions) in studied soft-ground coastal areas. It is during their decay that a specialized saprophilic complex of invertebrates is commonly formed. https://www.persianacarology.org/article_238479_087a365f676ac37cbd9b5ff2ec3229c2.pdf