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Tropidelasma strobilum
Taxonomy
Tropidelasma strobilum was named by Cooper and Grant (1974). Its type specimen is USNM 147780b, a shell (Articulated shell), and it is not a trace fossil.
Synonymy list
Year | Name and author |
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1974 | Tropidelasma strobilum Cooper and Grant pp. 346-347 figs. Pl 57, figs 1-20 |
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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.
†Tropidelasma strobilum Cooper and Grant 1974
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Diagnosis
No diagnoses are available
Measurements
part | N | mean | minimum | maximum | median | s.d. | |
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shell height | 9 | 27.0 | 8.70 | 58.6 | 25.6 | 16.8 |
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Source: c = class, p = phylum, uc = unranked clade | |||||
References: Aberhan et al. 2004, Nesnidal et al. 2013 |
Age range: base of the Sakmarian to the top of the Artinskian or 293.52000 to 279.30000 Ma
Collections (7 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Sakmarian | USA (Texas) | Tropidelasma strobilum (43542 43546 43606) | |
Artinskian | USA (Texas) | Tropidelasma strobilum (43533 43540 43568 105720) |