Opallionectes is a large, around 5 m long, derived cryptoclidid plesiosauroid from the Early Cretaceous of South Australia. It is known from a partial opalised skeleton, which is mounted for display in the South Australian Museum. The holotype specimen lacks a skull.
Category «Plesiosauria»
Plesionectes
Umoonasaurus
Umoonasaurus is a small (~2.5 m long) leptocleidid that lived during the Early Cretaceous in Southern Australia. The holotype specimen (AM F99374), a spectacular opalised skeleton including the skull, is nicknamed ‘Eric’. It is the most complete opalised plesiosaur skeleton (and fossil vertebrate) known.
Eardasaurus
The Return of the Blockley Plesiosaur
In summer 2023 a plesiosaur skeleton was offered at auction by Sotheby’s that may have looked familiar. This notable specimen is the ‘Blockley Plesiosaur’, originally offered at auction by Sotheby’s in 2010. This is a potentially significant specimen so I’m flagging it up to briefly discuss the provenance, history, and taxonomic identity of this curious skeleton.
Monquirasaurus
Monquirasaurus is a giant pliosaurid from Colombia, South America. Originally named by Hampe (1992) as a species of Kronosaurus (K. boyacensis), the skeleton was later allocated to the new genus Monquirasaurus by Noè and Gómez-Pérez (2021).
Nakonanectes
Nakonanectes is a small elasmosaurid plesiosaur from the Bearpaw Shale of Montana, USA. It is known from a single moderately complete specimen including a particularly fine skull. It has a relatively short neck for an elasmosaur consisting of ‘only’ 39-42 neck vertebrae.