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Dictyotomaria depressus
Taxonomy
Ptychomphalus depressus was named by Weller (1916). It is not extant. Its type locality is Bed No. 8, Fountain Creek, 2 miles southwest of Waterloo, which is in a Chesterian carbonate limestone in the Ste. Genevieve Formation of Illinois.
It was recombined as Glyptomaria (Dictyotomaria) depressus by Thein and Nitecki (1974); it was recombined as Dictyotomaria depressus by Wagner (2023).
It was recombined as Glyptomaria (Dictyotomaria) depressus by Thein and Nitecki (1974); it was recombined as Dictyotomaria depressus by Wagner (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1916 | Ptychomphalus depressus Weller |
| 1974 | Glyptomaria (Dictyotomaria) depressus Thein and Nitecki p. 108 |
| 2023 | Dictyotomaria depressus Wagner p. 6137 |
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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.
†Dictyotomaria depressus Weller 1916
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, o = order | |||||
| References: Hendy 2009, Bambach et al. 2007 | |||||
Age range: Chesterian or 335.40000 to 323.40000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Chesterian | USA (Illinois) | Ptychomphalus depressus (type locality: 68188) |