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- n. A primitive sauropterygian reptile of the Triassic period, vaguely resembling aquatic lizards.
Sorry, no etymologies found.
Actually, while their figure (fig. 13C) definitely depicts the hindlimb of a pachypleurosaur, they identified it in their figure caption as the hindlimb of the plesiosaur Cryptoclidus.
Jointed elements in the Naden Harbour specimen’s ‘tail pseudo-fluke’ (their term) were interpreted by Bousfield and LeBlond as being homologous with the hindlimb elements of Mesozoic marine reptiles, and they pointed in particular to a close similarity with the hindlimb of a pachypleurosaur (pachypleurosaurs are Triassic members of Sauropterygia, the reptile clade that includes plesiosaurs).