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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Callawayia
Taxonomy
Callawayia was named by Maisch and Matzke (2000).
It was assigned to Merriamosauria by Maisch and Matzke (2000); to Shastasauria by Chen et al. (2007); to Californosauridae by Maisch (2010); and to Euichthyosauria by Ji et al. (2016).
It was assigned to Merriamosauria by Maisch and Matzke (2000); to Shastasauria by Chen et al. (2007); to Californosauridae by Maisch (2010); and to Euichthyosauria by Ji et al. (2016).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2000 | Callawayia Maisch and Matzke pp. 69, 99 |
| 2007 | Callawayia Chen et al. |
| 2010 | Callawayia Maisch |
| 2016 | Callawayia Ji et al. p. 11 |
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. W. Maisch and A. T. Matzke 2000 | "Small ichthyosaur, total length probably around 2 m, parasphenoid reduced in size, basisphenoid enlarged, carotid foramen paired in basisphenoid, interpterygoid vacuities well developed, scapula with elongated dorsomedial blade and anterior and posterior extensions completely reduced, coracoids with clear medial symphysis, clavicle very slender, humerus short, forefin tridactyl, ulna small, intermedium possibly absent." | |
| C. Ji et al. 2016 | Frontal participation in upper temporal fenestra; distal ulna facet of humerus deflecting posterodistally but radius facet distally; radius facet on humerus larger than ulna facet; ulna medium-sized; radius much larger than ulna; manual pisi- form present; presacral count 55 or more; coracoid wider than long. |