The Mollusca of Galicia Bank (NE Atlantic Ocean) Author Gofas, Serge C7A4B3D3-AE51-4376-BA89-249CD1F1632D Departamento de Biología Animal, Facultad de Ciencias, Universidad de Málaga, 29071 Málaga, Spain. sgofas@uma.es Author Luque, Ángel A. 829C1CA8-1530-46FF-A7C9-55682E44E7B3 Centro de Investigación en Biodiversidad y Cambio Global (CIBC-UAM), Universidad Autónoma de Madrid, c / Darwin 2, 28049 Madrid, Spain. angel.luque@inv.uam.es Author Oliver, Joan Daniel 81A90DF7-933D-4B34-BE46-3630D93D57B9 Alcorisa 83 12 C, 28043 Madrid, Spain. joandanieloliver@hotmail.com Author Templado, José 191D7CF3-7F05-47F1-AFE5-60567B3A448A Museo Nacional de Ciencias Naturales (CSIC), c / José Gutiérrez Abascal 2, 28006 Madrid, Spain. templado@mncn.csic.es Author Serrano, Alberto 8FCDBDC3-3609-46B6-9847-B2E7871E4BEC Centro Oceanográfico de Santander, Instituto Español de Oceanografía, Apdo. 240 Promontorio San Martín, s / n, 39080 Santander, Spain. alberto.serrano@ieo.es text European Journal of Taxonomy 2021 2021-12-22 785 1 1 114 http://dx.doi.org/10.5852/ejt.2021.785.1605 journal article 2668 10.5852/ejt.2021.785.1605 37df827e-a876-4f53-ba38-7239e2c66802 2118-9773 5798418 8B61E9CD-DDCA-43FC-AB0A-B227C1A579E8 Addisonia cf. excentrica ( Tiberi, 1855 ) Fig. 3I Gadinia excentrica Tiberi, 1855: 13 , pl. 2 figs 5–6. Addisonia excentrica – Watson 1886: 32 . — Locard 1898: 93. Material examined GALICIA BANK • 1 sh ; 42°51′ N , 11°53′ W ; 1110‒1125 m ; 19 Oct. 1987 ; SEAMOUNT 1 DW108 ; MNHN • 5 spm ; 42°58.50′ N , 11°59.24′ W ; 1683 m ; 7 Aug. 2011 ; BANGAL 0711 GOC9 ; MNCN . Remarks Three living specimens (3.5, 3.4 and 2.0 mm) were found on the inside surface of an empty egg-capsule of the smalleyed rabbitfish, Hydrolagus affinis (de Brito Capello, 1868) (Holochephali, Chimaeridae). Two specimens (3.5 and 2.0 mm) were attached close to small oval thinner areas or holes on the wall of the egg-capsule ( Fig. 3I ) caused by limpet rasping during feeding ( Dantart & Luque 1994 ). The shell and the external morphology of the living specimens resemble those of A. excentrica from shallower depths, but given their small size, further anatomical and molecular study is needed to identify them with certainty. As far as we know, this is the deepest record ( 1683 m ) for living specimens of any Addisonia species. Living specimens of Addisonia excentrica were found down to 330‒426 m in the Mediterranean ( Dantart & Luque 1994 ). The NW Atlantic Addisonia paradoxa ( Dall, 1882 ) , synonymized with A. excentrica by Dantart & Luque (1994) , was found alive by Dall (1882) from 110 to 293 m , and McLean (1985) recorded it from 119 to 1170 m , deepest records being probably shells. Addisonia enodis Simone, 1996 , described from Brazil , was recorded alive down to 184 m ( Simone 1996 ; Lima et al. 2016 ) and the NE Pacific A. brophyi McLean, 1985 from 155 to 174 m depth. Besides, this is the first record of an Addisonia species living inside a holocephalan egg-capsule. In addition to two empty eggcapsules (only one of them with Addisonia ), three specimens ( 2 females and one male ) of Hydrolagus affinis were caught in the same sample ( Bañón et al. 2016 ).