title: Origin of marker species of diatoms of the genus Actinocyclus Ehr. from the middle and late holocene deposits of the Sea of Azov
abstract: The paper analyzes hypotheses about the autochthony or allochthony of the most abundant representatives of the genus Actinocyclus Ehr. in the Middle and Upper Quaternary deposits of the Sea of Azov. Arguments are presented that cast doubt on the hypothesis that Actinocyclus valves may be redeposited from Miocene deposits on the coast of the Kerch and Taman Peninsulas.
journal: Issues of modern algology (Вопросы современной альгологии)