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A new sphenodontian (Lepidosauria: Rhynchocephalia) from the McCoy Brook Formation (Lower Jurassic) of Nova Scotia, Canada.
The alternative to the Linnaean system, as proposed by the advocates of phylogenetic nomenclature, is an approach in which taxa (lineages) are defined on the basis of their relationships to one another, under the model indicated above for Lepidosauria and Mammalia.
(1984): The classification of the Lepidosauria. Zoological Journal of the Linnean Society, 82: 87-100.
At the base, in the Rabejac Fm, both reptilians (Pelycosauria, Parareptilia, Lepidosauria), and amphibians (Temnospondyls) show a moderate size ranging from decimetric to metric; the latters being less abundant and diversified.