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Phaceloolithus is nearly spherical, measuring 167–168 mm long and 140–150 mm across. The eggshell is very thin, measuring from 0.5 to 0.7 mm thick. [1] Like most other non-avian dinosaur eggs, [3] Phaceloolithus's shell is stratified into two layers: the prismatic layer on the outside, and the mammillary layer on the inside. [1]
The eggs of many different fish taxa have contributed to this record, including lobe-finned fish, placoderms, and sharks. Occasionally eggs are preserved still within the mother's body, or associated with fossil embryos. Some fossil eggs possibly laid by fish cannot be confidently distinguished from those laid by amphibians. [5]
Subtiliolithus is an oogenus of fossil egg from the Nemegt Formation of Mongolia and the Ohyamashimo Formation of Japan. The eggs are notable for a very thin eggshell. It contains three oospecies: S. hyogoensis, S. kachchhensis and S. microtuberculatus.
Hypselosaurus priscus egg. Egg paleopathology is the study of evidence for illness, injury, and deformity in fossilized eggs. A variety of pathological conditions afflicting eggs have been documented in the fossil record. Examples include eggshell of abnormal thickness and fossil eggs with multiple layers of eggshell.
This category is for all articles concerned with fossilized eggs or parts of eggs, including taxa defined on the basis of such fossils Wikimedia Commons has media related to Egg fossils . Subcategories
Image credits: Sivitri617 Around 6.3 million companion animals enter U.S. animal shelters every year. Of those, approximately 3.1 million are dogs and 3.2 million are cats.
Elongatoolithus is an oogenus of dinosaur eggs found in the Late Cretaceous formations of China and Mongolia. Like other elongatoolithids, they were laid by small theropods (probably oviraptorosaurs), and were cared for and incubated by their parents until hatching.
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