Preprismatoolithus Temporal range: Late Jurassic PreꞒ Ꞓ O S D C P T J K Pg N | |
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Egg fossil classification | |
Basic shell type: | †Dinosauroid-prismatic |
Oofamily: | †Prismatoolithidae |
Oogenus: | †Preprismatoolithus Zelenitsky & Hills, 1996 |
Preprismatoolithus is a Late Jurassic oogenus. The species P. coloradensis is described by John Foster as being "of the prismatic basic type," with subspherical eggs about 10 cm (4 inches) in diameter. This oospecies has been initially attributed to "hypsilophodontid" dinosaurs, although a lack of associated embryo material currently makes confirming the egg-layer's identity impossible, but now is known to be theropod after the finding in Portugal, associated with the embryos.
Eggshell present in great abundance at the so-called "Young Egg Locality" which seems to have been a dinosaur nesting ground. Congeneric eggshell fossils are found at additional Colorado sites including the Fruita Paleontological Area, the Uravan Locality and Garden Park.
See also
Footnotes
- ^ "Another Generation: The Eggs," Foster (2007) page 239.
- "Eggs," Foster (2007) page 125.
- Ribeiro, V., Mateus O., Holwerda F., Araújo R., & Castanhinha R. (2013). Two new theropod egg sites from the Late Jurassic Lourinhã Formation, Portugal. Historical Biology. (ahead-of-print), 1-12.
References
- Foster, J. (2007). Jurassic West: The Dinosaurs of the Morrison Formation and Their World. Indiana University Press. 389pp. ISBN 978-0-253-34870-8.
Taxon identifiers | |
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Preprismatoolithus |
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