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Robert Thomas Bakker (born March 24, 1945) is an American paleontologist who helped reshape modern theories about dinosaurs, particularly by adding support to the theory that some dinosaurs were endothermic (warm-blooded). [2]
Apr 1, 2003 · Globally, the known abundance and diversity of plesiosaurs from the Lower Cretaceous is very low, a fact which has been attributed both to extinction events ( Bakker, 1993) and to the inadequacy of the fossil record ( Bardet, 1994 ).
- James W. Haggart, Elizabeth L. Nicholls, Roderick Bartlett
- 2003
At first the animal was thought to be another Plesiosaurus species by William Johnson Sollas in 1881, [2] but after studies on the plaster casts made after the remains, Plesiosaurus conybeari was assigned to a new genus (Attenborosaurus) by Robert T. Bakker in 1993.
Robert T. Bakker argued that Dolichorhynchops and its relatives became the most common kind of short-necked plesiosaur in the Cretaceous Western Interior Seaway after the ichthyosaurs became extinct. Further, they convergently evolved many traits similar to those of ichthyosaurs, such as long snouts and large eyes.
Bakker, R. T. 1993. Plesiosaur extinction cycles- Events that mark the beginning, middle and end of the Cretaceous. In Caldwell, W. G. E. and Kaufman, E. G. (eds.).
Bob Bakker coined the new genus name to honour the esteemed wildlife documentarian Sir David Attenborough (Bakker 1993). Photograph of the holotype of Attenborosaurus, before it was destroyed. The skeleton was mounted in a block together with a cast of the opposite side of the body and the opposite side of the head (from Swinton, 1949)
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Is Bakker a plesiosaur?
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Feb 1, 2020 · The greatest number of specimens and diversity of Cretaceous plesiosaurs come from North America (Welles, 1943, Bakker, 1993, Carpenter, 1999, O'Keefe and O'Keefe, 2004b, O'Keefe, 2008, Sato, 2003, Bardet et al., 2014, Druckenmiller and Russell, 2008).
