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Schizotreta medioradiata
Taxonomy
Acrothele medioradiata was named by Reed (1917).
It was recombined as Schizotreta medioradiata by Williams (1962) and Candela and Harper (2014).
It was recombined as Schizotreta medioradiata by Williams (1962) and Candela and Harper (2014).
Synonymy list
| Year | Name and author |
|---|---|
| 1917 | Acrothele medioradiata Reed p. 813 figs. pl. iii, figs. 18-22 |
| 1962 | Schizotreta medioradiata Williams pp. 94 - 95 figs. Pl. VII, figs. 23-25, 27-29 |
| 2014 | Schizotreta medioradiata Candela and Harper pp. Supplement 1 |
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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.
†Schizotreta medioradiata Reed 1917
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Williams 1962 | Pale-brown, subcircular Schizotreta about as wide as long, with the umbo of the subconical pedicle valve, which is almost one-fifth as deep as long, located almost one-third the length of the valve forward of the posterior margin, ventral profile steep and convex posterior to, and gently concave anterior to, the umbo, pedicle slit narrow, over 1 mm. long; brachial valve fiat or gently convex with the umbo located within 1 mm. of the posterior margin; ornamentation of both valves consisting of fine, hair-like, concentric ridges, commonly 13 per millimetre 3 mm. anterior to the ventral umbo, and also up to 8 low corrugations radiating anteriorly from the umbones. |
Measurements
No measurements are available
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| Source: g = genus, o = order, c = class, uc = unranked clade | |||||
| References: Hendy 2009, Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: base of the Aurelucian to the top of the Cheneyan or 458.40000 to 451.30000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Aurelucian | United Kingdom (Scotland) | Schizotreta medioradiata (165037) | |
| Burrellian | United Kingdom (Scotland) | Schizotreta medioradiata (165038 165043) | |
| Cheneyan | United Kingdom (Scotland) | Schizotreta medioradiata (164953) |