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Cnemidiastrum (Tremastrum)
Taxonomy
Cnemidiastrum (Tremastrum) was named by Schrammen (1924). It is not extant. Its type is Cnemidiastrum pluristellatum.
It was assigned to Cnemidiastrum by Schrammen (1924), Finks et al. (2004).
It was assigned to Cnemidiastrum by Schrammen (1924), Finks et al. (2004).
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1924 | Cnemidiastrum (Tremastrum) Schrammen p. 129 |
| 2004 | Cnemidiastrum (Tremastrum) Finks et al. p. 292 |
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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.
Subg. †Cnemidiastrum (Tremastrum) Schrammen 1924
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†Cnemidiastrum (Tremastrum) pluristellatum Zittel 1878
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Whittington et al. 1997, Kiessling 2004 | |||||
Age range: base of the Middle Oxfordian to the top of the Early/Lower Kimmeridgian or 161.50000 to 152.21000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Oxfordian | Poland | Cnemidiastrum pluristellatum (114259) | |
| Middle Oxfordian - Late/Upper Oxfordian | Germany | Cnemidiastrum pluristellatum (74033) | |
| Early/Lower Kimmeridgian | Germany | Cnemidiastrum pluristellatum (74037) | |
| Kimmeridgian | Germany | Cnemidiastrum pluristellatum (74050 74063) |