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Placocliftonia
Taxonomy
Placocliftonia was named by Havlicek and Storch (1990) [Havlicek in Havlicek & Storch 1990].
It was assigned to Oxopleciidae by Havlicek and Storch (1990).
It was assigned to Oxopleciidae by Havlicek and Storch (1990).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1990 | Placocliftonia Havlicek and Storch pp. 60 -61 |
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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. †Placocliftonia Havlicek and Storch 1990
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†Placocliftonia colibri Barrande 1848
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| V. Havlicek and P. Storch 1990 | Shell tripartite, of spiriferid appearance, with a deep ventral sulcus and a narrow, highly elevated dorsal fold. Ribs rounded, usually simple, exceptionally bifurcating, crossed by concentric rugellae strongly swollen on tops of the ribs, and extending anteriorly into short spines. Pseudodeltidium flat, devoid of the median ridge; edge of the palintrope straight, tightly fitting against the hinge of the brachial valve. Dental plates absent; short pedicle tube and bifurcating cardinal process as in Clrftonia FoERSTE |
Measurements
No measurements are available
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: Sheinwoodian or 433.40000 to 430.50000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Sheinwoodian | Czech Republic | P. colibri (14096) |