| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Stephanastrum
Taxonomy
Stephanastrum was named by Ehrenberg (1847) [Sepkoski's age data: K Haut-l R]. It is not extant. Its type is Stephanastrum rhombus.
It was assigned to Histriastrinae by De Wever et al. (2001); and to Spumellaria by Sepkoski (2002).
It was assigned to Histriastrinae by De Wever et al. (2001); and to Spumellaria by Sepkoski (2002).
Species
S. orbiculare, S. rhombus (type species)
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1847 | Stephanastrum Ehrenberg |
| 2001 | Stephanastrum De Wever et al. p. 157 |
| 2002 | Stephanastrum Sepkoski |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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.
G. †Stephanastrum Ehrenberg 1847
show all | hide all
†Stephanastrum orbiculare Rüst 1898
Stephanastrum rhombus Ehrenberg 1847
Diagnosis
No diagnoses are available
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|||||
|
|
||||
| Source: p = phylum | |||||
| Reference: Kiessling 1999 | |||||
Age range
Maximum range based only on fossils: base of the Late/Upper Pliensbachian to the top of the Late/Upper Oxfordian or 189.60000 to 155.70000 Ma
Minimum age of oldest fossil (stem group age): 183.0 Ma
Minimum age of oldest fossil (stem group age): 183.0 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Pliensbachian | Canada (British Columbia) | S. magnum (71080) | |
| Late/Upper Oxfordian | Switzerland | S. orbiculare (47162) |