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Levisella
Taxonomy
Levisella was named by Ulrich (1930) [Sepkoski's age data: Cm Trep]. It is not extant.
It was assigned to Loganellidae by Ludvigsen et al. (1989); to Ptychopariida by Sepkoski (2002); and to Idahoiidae by Jell and Adrain (2002).
It was assigned to Loganellidae by Ludvigsen et al. (1989); to Ptychopariida by Sepkoski (2002); and to Idahoiidae by Jell and Adrain (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1930 | Levisella Ulrich |
| 1989 | Levisella Ludvigsen et al. p. 16 |
| 2002 | Levisella Jell and Adrain p. 397 |
| 2002 | Levisella Sepkoski |
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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.
G. †Levisella Ulrich 1930
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Subg. †Levisella (Lauzonella) Rasetti 1944
†Levisella affinis Billings 1865
†Levisella brevifrons Rasetti 1944
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. Ludvigsen et al. 1989 | A genus of Loganellidae with a relatively long anterior border. Palpebral lobe is long and located close to glabella. Anteriorly truncate glabella is parallel-sided or gently tapered; glabellar furrows are shallow on testate surfaces. Broad pygidium is subelliptical in outline with length less than half of width. |
Measurements
No measurements are available
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| Source: c = class | |||||
| Reference: Aberhan et al. 2004 | |||||
Age range: base of the Trempealeauan to the top of the Sunwaptan or 490.20000 to 488.90000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Sunwaptan | Canada (Quebec) | L. sp. (56819) | |
| Sunwaptan | Canada (Newfoundland and Labrador) | L. brevifrons (81277) L. punctata (81285) | |
| Trempealeauan | Canada (Quebec) | L. affinis (224139) L. brevifrons (224136) L. oweni (224138 224140) |