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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Taxonomy
Macrocallista williamsoni was named by Weaver and Van Winkle Palmer (1922). It is a 3D body fossil. Its type locality is UW 319, which is in a Bartonian marine horizon in the Cowlitz Formation of Washington.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1922 | Macrocallista williamsoni Weaver and Van Winkle Palmer pp. 21-22 figs. pl. 10, figs. 1, 11 |
| 1938 | Macrocallista williamsoni Effinger p. 371 |
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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.
†Macrocallista williamsoni Weaver and Van Winkle Palmer 1922
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, c = class | |||||
| References: Aberhan et al. 2004, Hendy et al. 2009, Kiessling 2004 | |||||
Age range: base of the Bartonian to the top of the Priabonian or 41.30000 to 33.90000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Bartonian | USA (Washington) | Macrocallista williamsoni (type locality: 200105) | |
| Priabonian | USA (Washington) | Macrocallista williamsoni (40733) |