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Igonoia shastana
Taxonomy
Igonoia shastana was named by Squires (2011). Its type specimen is LACMIP 13684, a shell, and it is a 3D body fossil. Its type locality is LACMIP loc. 28757, Thompson Creek, which is in a Turonian basinal (siliciclastic) horizon in the Yolo Formation of California.
Synonymy list
| Year | Name and author |
|---|---|
| 2011 | Igonoia shastana Squires pp. 140 - 141 figs. Figures 9 – 16 |
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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.
†Igonoia shastana Squires 2011
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. L. Squires 2011 | Small-sized Igonoia, spiral ribs numerous and uniformly noded except on anterior half of last whorl and on posterior part of base of last whorl. |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Kiessling 2004, Hendy et al. 2009 | |||||
Age range: base of the Middle Albian to the top of the Early/Lower Cenomanian or 109.00000 to 93.50000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Albian | USA (California) | Igonoia shastana (216385) | |
| Late/Upper Albian - Early/Lower Cenomanian | USA (California) | Igonoia shastana (220301) | |
| Cenomanian | USA (California) | Igonoia shastana (220369) | |
| Turonian | USA (California) | Igonoia shastana (type locality: 178509) |