Tethydidae
Tethydidae is a family of dendronotid nudibranch gastropod mollusks in the superfamily Tritonioidea. The original spelling (subfamily) is Tethydia. It was placed on the Official List by Opinion 1182 of ICZN (1981: 174), which also ruled that the name should be corrected to Tethydidae (Bouchet & Rocroi, 2005). Taxonomy. This family is within the clade Cladobranchia and has no subfamilies (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). Genera. There are two genera within the family Tethydidae: Description. Species in this family do not possess a radula.