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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Hystrix kayae
Taxonomy
Hystrix kayae was named by Halaçlar et al. (2023). Its type specimen is CO-2481, a maxilla (palate, preserving right and left P4-M3), and it is a 3D body fossil.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 2023 | Hystrix kayae Halaçlar et al. p. 3 figs. Fig. 2 |
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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.
†Hystrix kayae Halaçlar et al. 2023
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| K. Halaçlar et al. 2023 | Medium sized Hystrix with brachydont upper cheek teeth. The three molars are of equal length, with the P4 slightly larger, approximately 20% larger than the molars. The choanae, located at the anterior end, have a U-shaped structure and are positioned at the level of the M2’s hy- poflexus. The EH/L ratio of the upper molars is nearly identical. The P4 displays an additional groove on its an- terior side due to the absence of a parastyle, resulting in a wider parafossetta that transforms into a groove, thus sep- arating the anteroloph from the protocone. On occlusal surface of the M1 and M2, there is a notable connec- tion between anterior mesoflexus and hypoflexus. The oc- clusal surface of the P4 and M3 is oval in shape, while the M1 and M2 are rectangular. |