First record of Ogmogaster antarctica Johnston, 1931 (Trematoda: Notocotylidae) on the edge of the Arctic ocean

On the November 27, 2021, a male fin whale <i>Balaenoptera physalus</i> (Linnaeus), measuring 17.92 m in length was reported stranded dead on the Icelandic shore (N63.86°, W21.37°). As geographical and meteorological conditions allowed, a necropsy was performed onsite including measurements and collection of samples from the organs. Here, we report the first evidence of the presence of <i>Ogmogaster antarctica</i> Johnston, 1931, collected from the intestine of the stranded fin whale, off the coast of Iceland, on the edge of the Arctic Ocean. Additionally, we provide a new set of morphological and molecular characterization associating morphometric description and genetic sequence. This study sheds new light on the distribution of the digeneans of the genus <i>Ogmogaster</i>, Jägerskiöld, 1891, especially <i>O. antarctica</i>, and adds valuable information to the biodiversity of parasites species in potential hosts of the sub-Arctic ocean.