Marine gastrotrichs from the Tuscan Archipelago (Tyrrhenian Sea): I. Macrodasyida, with description of three new species

The sediments from 16 localitie s (8 from the Island of Elba, 3 from the lsland of Giglio, and 5 from the Island of Capraia) yielded several hundreds of specimens, all identified. Theey belong two 28 species in 1l genera in 5 familices. Of the three island, Elba, with 25 species, proved to be the richest, followed bv Capraia, with l8 species, and finally by Giglio with only 8 species. Diplotdasys meloriae, Tetranchyrorlerma quadritentaculatum, and T. sanctaecaterinae are new to science. Tetranchlroderma cirropbora is new for the Italian fauna.