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Eosyngastrioceras quadratum
Taxonomy
Eosyngastrioceras quadratum was named by Titus (2000). Its type specimen is USNM 120617 and is a 3D body fossil. Its type locality is USGS loc. 15782-PC, Cottonwood Mountains, which is in an Arnsbergian marine limestone/siltstone in the Rest Spring Formation of California. It is the type species of Eosyngastrioceras.
Synonymy list
| Year | Name and author |
|---|---|
| 2000 | Eosyngastrioceras quadratum Titus pp. 39 - 40 figs. Plate 10, figures 1-17; figure 32 |
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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.
†Eosyngastrioceras quadratum Titus 2000
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. L. Titus 2000 | Moderately evolute species with a sub-rounded to sub-rectangular venter and umbilical ratios of approxi- mately two-fifths (42 to 35 percent) of D. Growth lamellae distinct until at least 30 mm diameter. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Age range: Arnsbergian or 326.90000 to 323.60000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Arnsbergian | USA (California) | Cravenoceras hesperium (type locality: 217081) Eosyngastrioceras quadratum (217147) |