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parvipelvia
Parvipelvia (Latin for "little pelvis" - ''parvus'' meaning "little" and ''pelvis'' meaning "pelvis") is an extinct clade of euichthyosaur ichthyosaurs from the Late Triassic to the early Late Cretaceous (middle Norian - Cenomanian) of Asia, Australia, Europe, North America and South America. Named by Ryosuke Motani, in 1999, it contains the basal taxa like ''Macgowania'' and ''Hudsonelpidia''. Maisch and Matzke (2000) found in their analysis seven synapomorphies that support Parvipelvia. They also found 10 synapomorphies that support the existence of post-Triassic clade of ichthyosaurs (all parvipelvians excluding ''Macgowania'' and ''Hudsonelpidia''), for which the name Neoichthyosauria was found to be available.
== Phylogeny ==
Parvipelvia is a node-based taxon defined in 1999 as "the last common ancestor of ''Hudsonelpidia'', ''Macgowania'', ''Ichthyosaurus'' and all of its descendants".〔 Maisch and Matzke (2000) also defined Neoichthyosauria which is a node-based taxon originally named by P. Martin Sander in 2000, as "the last common ancestor of ''Temnodontosaurus trigonodon'' and ''Ophthalmosaurus icenicus'' and all of its descendants".〔 The cladograms below follows Motani (1999) and Maisch and Matzke (2000).〔〔
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