Basic info | Taxonomic history | Classification | Included Taxa |
Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Xenosteges umbonatus
Taxonomy
Xenosteges umbonatus was named by Cooper and Grant (1975). Its type specimen is USNM 149217d, a shell (Articulated shell), and it is not a trace fossil.
Synonymy list
Year | Name and author |
---|---|
1975 | Xenosteges umbonatus Cooper and Grant p. 861 figs. Pl 233, figs 41-62; pl 236, figs 57-70 |
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.
†Xenosteges umbonatus Cooper and Grant 1975
show all | hide all
Diagnosis
No diagnoses are available
Measurements
part | N | mean | minimum | maximum | median | s.d. | |
---|---|---|---|---|---|---|---|
shell height | 9 | 4.44 | 3.00 | 5.60 | 4.90 | 0.959 |
|
|
||||
|
|
||||
|
|||||
|
|
||||
|
|
||||
Source: subo = suborder, c = class, p = phylum, uc = unranked clade | |||||
References: Williams et al. 2000, Aberhan et al. 2004, Nesnidal et al. 2013 |
Age range: base of the Wordian to the top of the Capitanian or 266.90000 to 259.51000 Ma
Collections (6 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Wordian | USA (Texas) | Xenosteges umbonatus (81939 101867 102619) | |
Capitanian | USA (Texas) | Xenosteges umbonatus (105894 105993) | |
Capitanian | USA (New Mexico) | Xenosteges umbonatus (102622) |