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Tristraguloolithus cracioides
Taxonomy
Tristraguloolithus cracioides was named by Zelenitsky et al. (1996). It is considered to be a form taxon. Its type specimen is RTMP 95.17.6, an egg, and it is a 3D body fossil. Its type locality is Knight's Ranch, which is in a Campanian terrestrial mudstone in the Oldman Formation of Canada. It is the type species of Tristraguloolithus.
Synonymy list
| Year | Name and author |
|---|---|
| 1996 | Tristraguloolithus cracioides Zelenitsky et al. p. 1662–1664 figs. 4E-H, 5A-D |
| 2015 | Tristraguloolithus cracioides Currie and Koppelhus p. 625 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Tristraguloolithus cracioides Zelenitsky et al. 1996
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. K. Zelenitsky et al. 1996 | Eggshell thickness 0.32—0.3 mm; three structural layers (external zone, continuous layer, and mammillary layer); ez:cl:ml thickness ratio of 0.5:1:1; ornamentation dispersituberculate; and pore system angusticanaiiculate. |