Morphological Characters of the Thickbody Skate Amblyraja frerichsi (Krefft 1968) (Rajiformes: Rajidae), with Notes on Its Biology Bustamante, Carlos ; Lamilla, Julio ; Concha, Francisco ; Ebert, David A. ; Bennett, Michael B. Abstract Publication: PLoS ONE Pub Date: June 2012 DOI: 10.1371/journal.pone.0039963 Bibcode: 2012PLoSO...739963B