Preprismatoolithus

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Preprismatoolithus is a Late Jurassic oogenus. The species P. coloradensis is described by John Foster as being "of the prismatic basic type,"[1] with subspherical eggs about 10 cm (4 inches) in diameter.[2] This oospecies was first attributed to "hypsilophodontid" dinosaurs, although an initial lack of associated embryo material made confirming the egg-layer's identity impossible.[1] After a finding in Portugal[3] associated prismatic basic types with embryos, it now is known to be theropod.

Quick Facts Egg fossil classification ...
Preprismatoolithus
Temporal range: Late Jurassic
Egg fossil classification
Basic shell type: Dinosauroid-prismatic
Oofamily: Prismatoolithidae
Oogenus: Preprismatoolithus
Zelenitsky & Hills, 1996
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Eggshell present in great abundance at the so-called "Young Egg Locality" which seems to have been a dinosaur nesting ground.[1] Congeneric eggshell fossils are found at additional Colorado sites including the Fruita Paleontological Area, the Uravan Locality and Garden Park.[1]

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