Estonian Enchytraeidae 4. Sublittoral Enchytraeidae (Annelida, Oligochaeta) in the eastern Baltic Sea

Abstract

Only two enchytraeid species were found to be common and abundant in the sublittoral of the eastern Baltic Sea: a dwarfish form of Lumbricillus lineatus and Marionina naso n. sp., the latter probably belonging to the cool-water "glacial relics". Results are based on hundreds of samples from zoobenthos surveys made in the last century, covering the whole area. Descriptions of the two species are given. Several more species (Lumbricillus cf. arenarius, L. buelowi, L. cf. pumilio, Marionina southerni, M. spicula, and unidentified taxa) were found occasionally and in small numbers only.