• Corpus ID: 82936031

A Cladistic Analysis and Taxonomic Revision of the Plesiosauria (Reptilia: Sauropterygia)

@inproceedings{OKeefe2001ACA,
  title={A Cladistic Analysis and Taxonomic Revision of the Plesiosauria (Reptilia: Sauropterygia)},
  author={F. Robin O'Keefe},
  year={2001}
}
  • F. O'Keefe
  • Published 2001
  • Environmental Science, Geography
The Plesiosauria (Reptilia: Sauropterygia) is a group of Mesozoic marine reptiles known from abundant material, with specimens described from all continents. The group originated very near the Triassic–Jurassic boundary and persisted to the endCretaceous mass extinction. This study describes the results of a specimen-based cladistic study of the Plesiosauria, based on examination of 34 taxa scored for 166 morphological characters. The Pliosauroidea is found to by polyphyletic due to the… 

PRELIMINARY DESCRIPTION AND PHYLOGENETIC POSITION OF A NEW PLESIOSAUR (REPTILIA: SAUROPTERYGIA) FROM THE TOARCIAN OF HOLZMADEN, GERMANY

A phylogenetic analysis places Plesiopterys as the sister group of the Plesiosauroidea, and as such the taxon is the most basal taxon yet known on the branch leading to this major clade.

Phylogenetic relationships of Upper Jurassic (Middle Volgian) plesiosaurians (Reptilia: Sauropterygia) from the Agardhfjellet Formation of central Spitsbergen, Norway

The phylogenetic relationships of these five taxa were investigated based on data sets previously constructed for global plesiosaurian relationships, and yielded a tree topology closely conforming to the traditional plesioauroid and pliosauroid dichotomy, nesting Leptocleidia within the latter.

New information on Bobosaurus forojuliensis (Reptilia: Sauropterygia): implications for plesiosaurian evolution

Bobosaurus shows that the evolution of the plesiosaurian body plan from the ancestral pistosauroid grade was a step-wise process, and that some of the vertebral and appendicular specialisations of Jurassic and Cretaceous plesioaurians had already developed in the earliest Late Triassic.

Two new species of long-necked plesiosaurians (Reptilia: Sauropterygia) from the Upper Jurassic (Middle Volgian) Agardhfjellet Formation of central Spitsbergen

The Middle Volgian age of this material helps to bridge the temporal and morphological gap between better known Middle and Late Jurassic plesiosaurians from Europe and Late Cretaceous taxa primarily known from North America.

Anatomy of Colymbosaurus megadeirus (Reptilia, Plesiosauria) from the Kimmeridge Clay Formation of the U.K., and High Diversity Among Late Jurassic Plesiosauroids

Substantial differences between the atlas-axis complexes and cervical vertebrae of Kimmerosaurus langhami, ‘Plesiosaurus’ manselii, C. megadeirus, and specimens referred here to cf.

THE ANATOMY AND TAXONOMY OF MACROPLAT A TENUICEPS (SAUROPTERYGIA, PLESIOSAURIA) FROM THE HETTANGIAN (LOWER JURASSIC) OF WARWICKSHIRE,

A detailed re-description and revised diagnosis is given for Macroplata tenuiceps Swinton, 1930, a ple- siosaurian known from a single almost complete specimen (BMNH R5488) from the Blue Lias

Revision of polycotylid plesioaur systematics (sauropterygia plesiosauria) and description of the axial osteology of a juvenile polycotylid

A phylogenetic analysis incorporating a large taxon sampling from the Polycotylidae was used to parse out the evolutionary relationships among the taxa, and revealed that the two Wallace Ranch specimens form a well-supported clade, and feature a mosaic of character states found in currently described species, and may represent a new species.

The Anatomy and Taxonomy of Macroplata tenuiceps (Sauropterygia, Plesiosauria) from the Hettangian (Lower Jurassic) of Warwickshire, United Kingdom

ABSTRACT A detailed re-description and revised diagnosis is given for Macroplata tenuiceps Swinton, 1930, a plesiosaurian known from a single almost complete specimen (BMNH R5488) from the Blue

Osteology of Yunguisaurus Cheng et al., 2006 (Reptilia; Sauropterygia), a Triassic Pistosauroid from China

Detailed comparison revealed morphological differences in various parts of the postcranial, suggesting that Yunguisaurus was not necessarily comparable to the Plesiosauria in terms of body plan and mode of swimming.
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