Review of Baeolidia, the largest genus of Aeolidiidae (Mollusca: Nudibranchia), with the description of five new species Author Carmona, Leila Author Pola, Marta Author Gosliner, Terrence M. Author Cervera, Juan Lucas text Zootaxa 2014 3802 4 477 514 journal article 45651 10.11646/zootaxa.3802.4.5 71e8a84e-1a9b-4849-9a09-ec2023643364 1175-5326 249605 4095CA09-8EA4-4941-8286-32E95F0206AE Baeolidia occidentalis ( Bergh, 1874 ) Aeolidiella occidentalis Bergh, 1874 : 397 , pl. VIII, Figs. 9 –19. Spurilla occidentalis ( Bergh, 1874 ) : Labbé 1930 , 623. Type locality. The Antilles, not very far from Saint Thomas . Type material. According to Bergh (1874) , the material was deposited in the Museum of Copenhagen. The registration number of the holotype of Baeolidia occidentalis is ZMUC-GAS 2042. Geographical distribution. So far, this species is only known from the Antilles ( Bergh, 1874 ). External and internal morphology. Not completely described by Bergh (1874) . No specimens available for the present study. Remarks. Bergh (1874) described this species, Aeolidiella occidentalis , based on three specimens. Since they were already preserved and in a bad state of conservation, Bergh (1874) did not describe the colouration of the living animal. The radular teeth, the morphology of the cerata and the oral glands described by Bergh (1874) seem to associate this “species” with the genus Baeolidia . Although Bergh’s original description does not allow identifying this “species”, B. occidentalis have been reported in some contributions about Sargassum and its ecological aspects (e.g. Adams 1960 ; Thiel & Gutow 2005 ). However, none of these contributions provided a detailed description of this “species” or of the specimen identified as B. occidentalis . The lack of any singular morphological feature in this species leads us to conclude that Baeolidia occidentalis should be treated as nomen dubium .