| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Lotagnostus americanus
Taxonomy
Agnostus americanus was named by Billings (1860).
It was recombined as Lotagnostus americanus by Westrop et al. (2011).
It was recombined as Lotagnostus americanus by Westrop et al. (2011).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1860 | Agnostus americanus Billings pp. 303 - 304 figs. 1a, b |
| 2011 | Lotagnostus americanus Westrop et al. pp. 578 - 584 figs. 5, 6 |
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.
†Lotagnostus americanus Billings 1860
show all | hide all
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. R. Westrop et al. 2011 | Lotagnostus with weakly scrobiculate cephalon partly effaced externally but with weakly convex glabella well defined on internal mould; short basal glabellar lobes terminate well short of level of axial node. Distinct median indentation of acrolobe at anterior tip of preglabellar median furrow. Pygidial acrolobe gently constricted. F1 furrows not connected across axis. Posteroaxis long; trisection weakly developed, with intranotular axis recognizable primarily by change in slope medially, and may be absent altogether in small individuals. |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|
||||
|
|
||||
|
|
||||
| Source: g = genus, f = family, o = order | |||||
| References: Hendy 2009, Kiessling 2004 | |||||
Age range: base of the Trempealeauan to the top of the Tremadocian or 492.50000 to 477.70000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Sunwaptan | Canada (Quebec) | Agnostus americanus (56819) | |
| Trempealeauan | Canada (Quebec) | Agnostus americanus (224136 224139) | |
| Tremadocian | Canada (Newfoundland and Labrador) | Lotagnostus americanus (81289) |