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Pradesura
Taxonomy
Pradesura was named by Spencer (1951) [Sepkoski's age data: O Aren-l Sepkoski's reference number: 805]. It is not extant. Its type is Palaeura jacobi. It is the type genus of Pradesuridae. It was considered monophyletic by Dean Shackleton (2005).
It was assigned to Pradesuridae by Spencer (1951), Owen (1965) and Spencer and Wright (1966); to Stenurida by Sepkoski (2002); and to Eophiuridae by Dean Shackleton (2005).
It was assigned to Pradesuridae by Spencer (1951), Owen (1965) and Spencer and Wright (1966); to Stenurida by Sepkoski (2002); and to Eophiuridae by Dean Shackleton (2005).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1951 | Pradesura Spencer p. 111 |
| 1965 | Pradesura Owen p. 547 |
| 1966 | Pradesura Spencer and Wright p. U80 |
| 2002 | Pradesura Sepkoski |
| 2005 | Pradesura Dean Shackleton p. 78 |
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. K. Spencer 1951 | A stenurid of the family Pradesuridae with well-plated disk and spines on the lateralia placed upon a ridge which runs at an angle to the arms's length. Ambulacral basins shared subequally by two ambulacralia | |
| J. Dean Shackleton 2005 | Longitudinally adjacent ambulacrals overlapping; stone canal decalcified. |
Measurements
No measurements are available
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| Source: subp = subphylum, p = phylum | |||||
| References: Aberhan 1992, Bambach et al. 2007 | |||||
Age range: base of the Arenig to the top of the Tremadocian or 478.60000 to 477.70000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Tremadocian | France (Languedoc-Roussillon) | Palaeura jacobi (101705) | |
| Arenig | France (Montagne Noire) | Palaeura jacobi (20828) |