Urkmez, DeryaOstrowska, MartaRoszkowska, MilenaGawlak, MagdalenaZawierucha, KrzysztofKristensen, Reinhardt MobjergKaczmarek, Lukasz2025-03-232025-03-2320181745-10001745-1019https://doi.org/10.1080/17451000.2017.1342845https://hdl.handle.net/11486/5713In this paper, Megastygarctides sezginii sp. nov., a new marine species fromthe Black Sea (Turkey), is described. Morphological and morphometric studies have revealed that M. sezginii sp. nov. is most similar to M. setoloso Morgan & O'Reilly, 1988, but differs from it through the presence of two types of fibrils, a lack of cuticle granulation, the presence of three lateral projections with fibrils, leg fibrils arranged in transverse stripes and the presence of clumps of fibrils near the clavae. In the studied environment, the new species is frequently found in summer and almost absent in winter. Additionally, a taxonomic key for all Megastygarctides species is presented.eninfo:eu-repo/semantics/closedAccessEuropeHeterotardigradamarine tardigradesmeiofaunanew speciesTardigradaTurkeyArticle14111610.1080/17451000.2017.13428452-s2.0-85031767839Q3WOS:000423095000001Q3