Filogranula rzhavski sp. n. (Polychaeta, Serpulidae) from the Russian Far Eastern Seas
Filogranula rzhavski sp. n. is described fromoff the Russian Pacific Coast. This is the first record of the genus from this region. Filogranula rzhavski sp.n. is characterized by a simple membranous funnel-shaped operculum without chitinized structures and by the tube without peristomes, differing in these characters from the hitherto described species of this genus. Differences between the genera Filogranula Langerhans, 1884 and Chitinopoma Levinsen 1883 are also discussed.