| | Plesiosauria Translation and Pronunciation Guide (Site not responding. Last check: 2007-10-24) |
 | | Type Species: Eurycleidus arcuatus [ahr-koo-AY-tuhs] (Owen 1848) "curved," for Plesiosaurus arcuatus Owen 1840, in apparent reference to the "nearly circular" contour of the articular surface on the body of the vertebrae, contrasting with the "triangular form" of the centra of the vertebrae in "Plesiosaurus" subtrigonus Owen 1840. |
 | | The type specimen of Pachycostasaurus seems to have some juvenile features, but whether it represents an immature individual of a previously known species, or whether the thick bone structure would have changed in the fully adult form is unclear at present. |
 | | Type Species: Pliosaurus brachydeirus [brak-ee-DIE-ruhs] "short- necked" Owen 1841; "the vertebrae of the neck are so modified that the peculiarly elongated proportion of this part of the spine, which characterizes the typical Pleisosauri, is exchanged for one that much more nearly approaches the oppposite condition of the cervical region in the Ichthyosauri" (Owen 1841). |
| www.isgs.uiuc.edu /dinos/dml/names/ples.html (13576 words) |