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Excorbula shastana
Taxonomy
Excorbula shastana was named by Squires and Saul (2004). Its type specimen is LACMIP 13121 and is a 3D body fossil. Its type locality is LACMIP loc. 24666, Deer Creek, which is in a Santonian marine siliciclastic in the Chico Formation of California.
Synonymy list
| Year | Name and author |
|---|---|
| 2004 | Excorbula shastana Squires and Saul p. 117 figs. Figures 36-39 |
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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.
†Excorbula shastana Squires and Saul 2004
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. L. Squires and L. R. Saul 2004 | Small Excorbula with shell trigonal to subtrigonal. Left valve smooth. Commarginal ribs on right valve up to medium strength. Posterior slope moderately wide on right valve. |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Sanchez Roig 1926, Aberhan et al. 2004 | |||||
Age range: base of the Late/Upper Santonian to the top of the Santonian or 85.80000 to 83.60000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Santonian | USA (California) | Excorbula shastana (220379 type locality: 220380) | |
| Late/Upper Santonian | USA (California) | Excorbula shastana (215319) |