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Taxonomy
Philhedra playfairi was named by Reed (1917) [Philhedra Playfairi].
Sister species lacking formal opinion data
Synonymy list
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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.
†Philhedra playfairi Reed 1917
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. R. C. Reed 1917 | Shell subquadrate, widening anteriorly, slightly emarginate on anterior and posterior borders. Upper valve convex, rounded; apex obtuse, excentric, situated nearer posterior than anterior margin ; posterior face short, steep. Interior of upper valve with weak transversely oval posterior occlusors close to margin, and deeply sunk subcentral circular anterior occlusors situated closer together, with narrow longitudinal median ridge in depression between them; strong lateral vascular sinus on each side, extending round in front of anterior occlusors and nearly meeting in middle and giving off to margins short radiating lateral branches. Surface of shell ornamented with thin sublamellose concentric growth-ridges somewhat irregular, and bearing small sub-equidistant pustules. |
Measurements
No measurements are available
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| Source: g = genus, o = order, c = class, p = phylum | |||||
| References: Williams et al. 1996, Aberhan et al. 2004, Hendy 2009 | |||||
Age range: Burrellian or 456.60000 to 452.50000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Burrellian | United Kingdom (Scotland) | Philhedra playfairi (165038) |