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Cidaris merriami
Taxonomy
Cidaris merriami was named by Arnold (1908). Its type specimen is USNM 165438, a partial shell (imperfect spine), and it is a 3D body fossil.
It was recombined as Hesperocidaris merriami by Grant and Hertlein (1938).
It was recombined as Hesperocidaris merriami by Grant and Hertlein (1938).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1908 | Cidaris merriami Arnold p. 359 figs. Plate XXXII, fig. 8 |
| 1915 | Cidaris merriami Clark and Twitchell p. 114 |
| 1920 | Cidaris merriami Kew p. 53 figs. Plate 3, figure 3 |
| 1938 | Hesperocidaris merriami Grant and Hertlein p. 9 |
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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.
†Cidaris merriami Arnold 1908
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class, p = phylum | |||||
| References: Aberhan 1992, Kiessling 2004 | |||||
Age range: base of the Paleocene to the top of the Early/Lower Eocene or 66.00000 to 48.07000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Paleocene | USA (California) | Cidaris merriami (190795) | |
| Early/Lower Eocene | USA (California) | Hesperocidaris merriami (203410) | |
| Ypresian | USA (California) | Hesperocidaris merriami (52421) |