Megachasmidae
Megachasmidae is a proposed family of large, extinct marine reptiles. The name suggests a connection to the ancient ocean environments and their considerable size. Fossil evidence for Megachasmidae is scarce and primarily consists of fragmentary remains, making definitive classification challenging. These fossils indicate creatures that were likely apex predators or large filter-feeders within their ecosystems.
The proposed members of this family are hypothesized to have inhabited prehistoric seas during the Mesozoic