12/16/2023 0 Comments Crazy dino park plesiosaurusThe specimen had resided in a Museum’s storage facility for decades before these researchers undertook their study and before this unique fossil was displayed. The research is based on a 78- million-year-old plesiosaur fossil on display in NHM’s Dinosaur Hall, known as the “Pregnant Plesiosaur”: an adult with the bones of a fetal plesiosaur in its abdomen. They were among the top predators in the Western Interior Seaway, the large inland sea that existed during the Cretaceous period stretching from the Gulf of Mexico to the Arctic Ocean.Ī previous study by O’Keefe and NHM Dinosaur Institute Director Luis Chiappe suggested that at least some plesiosaurs gave birth to live young about 40% the length of the mother - equivalent to a human mother giving birth to a six year old child. They typically had broad bodies, short tails, and large flippers. Plesiosaurs were a diverse family of giant marine reptiles (not dinosaurs) that lived during the Mesozoic Era and have no living relatives. candidate at Bonn University, co-authored the study in Integrative and Comparative Biology that analyzed the bone tissues of fossils of two species within the plesiosaur family: Polycotylus latippinus and Dolichorhynchops bonneri. Robin O’Keefe, research associate of the Natural History Museum of Los Angeles County (NHM) and professor at Marshall University Martin Sander, professor at Bonn University in Germany and Tanja Wintrich, Ph.D. JanuLos Angeles, CA - New research on plesiosaur fossils supports hypothesis that plesiosaurs gave birth to live young and provides new evidence of rapid fetal bone growth that resulted in babies that were poor swimmers and likely required parental care. Hypothesis about extinct marine reptile reproduction is supported by latest research of fossil, which also adds further evidence for maternal care Baby Plesiosaurs Were Weak Swimmers: New Analysis of Pregnant Plesiosaur Fossil on View at Natural History Museum of Los Angeles County
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