REDESCRIPTION OF TYRINNA NOBILIS BERGH, 1898 (OPISTHOBRANCHIA: CHROMODORIDIDAE) FROM PATAGONIA, ARGENTINA

The chromodond nudibranch Tyritma nobiiis, described originally by Bergh, 1898 from Chile, has been collected on the Atlantic coast of Patagonia (Argentina) We have made a redescription which includes the presence of a vestibular gland, absent in the Bergh's description, and provided information on the biology of the living animal* Tynnna nobihs was compared with other nominal species assigned to the genera Cadlina and Tyrinna. Tynnna pusae Marcus, 1959 was synonymised with T. nobdis, and Cadlina bumayi Ortea, 1988 was included in Tynnna. The presence of a ramifying vestibular gland in T nobiiis, was discussed in relation to phylogeny of the family Chromodorididae