| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Hormotoma anna
Taxonomy
Murchisonia anna was named by Billings (1859). It is not a trace fossil.
It was recombined as Hormotoma anna by Ulrich and Scofield (1897), Wagner (1999), Wagner (2023).
It was recombined as Hormotoma anna by Ulrich and Scofield (1897), Wagner (1999), Wagner (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1859 | Murchisonia anna Billings pp. 358 - 359 figs. f. 8a, 8d |
| 1886 | Murchisonia anna Whitfield p. 318 |
| 1897 | Hormotoma anna Ulrich and Scofield p. 1014 |
| 1999 | Hormotoma anna Wagner |
| 2023 | Hormotoma anna Wagner p. 1536 |
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.
†Hormotoma anna Billings 1859
show all | hide all
Diagnosis
No diagnoses are available
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|
||||
|
|
||||
|
|
||||
|
|||||
|
|
||||
|
|
||||
| Source: subg = subgenus, o = order | |||||
| References: Bambach et al. 2007, Aberhan et al. 2004, Hendy 2009 | |||||
Age range: base of the Floian to the top of the Blackhillsian or 477.10000 to 471.30000 Ma
Collections (9 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Cassinian | USA (Missouri) | Murchisonia gracilis (75551) Murchisonia n. sp. #3 (75557) Murchisonia n. sp. #3, Murchisonia gracilis (75547) Murchisonia n. sp. #4 (75578) Murchisonia n. sp. #5 (75519 75525) | |
| Cassinian | USA (Arkansas) | Hormotoma anna (64598) | |
| Tulean - Blackhillsian | United Kingdom (Scotland) | Murchisonia anna (188697) | |
| Floian | USA (Arkansas) | Hormotoma anna (99119) |