Valdés, Á. (2001). On the publication date, authorship, and species of Umbraculum and Tylodina (Gastropoda: Opisthobranchia: Tylodinoidea). The Nautilus. 15(1): 29-34, figs. 1-3.
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Valdés, Á.
2001
On the publication date, authorship, and species of <i>Umbraculum</i> and <i>Tylodina</i> (Gastropoda: Opisthobranchia: Tylodinoidea).
