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Craigella grayiae
Taxonomy
Triplesia grayiae was named by Davidson (1870) [Triplesia Grayiae]. It is the type species of Epacroplecia.
It was recombined as Cliftonia grayiae by Reed (1917); it was recombined as Epacroplecia grayiae by Williams (1962) and Mitchell (1977); it was recombined as Craigella grayiae by Candela and Harper (2014).
It was recombined as Cliftonia grayiae by Reed (1917); it was recombined as Epacroplecia grayiae by Williams (1962) and Mitchell (1977); it was recombined as Craigella grayiae by Candela and Harper (2014).
Synonymy list
| Year | Name and author |
|---|---|
| 1870 | Triplesia grayiae Davidson p. 198 figs. pl. xxiv, figs. 31, 32; pl. xxv, figs. 9, 10, 11 |
| 1917 | Cliftonia grayiae Reed p. 913 figs. pl. xx, figs. 26, 27. |
| 1962 | Epacroplecia grayiae Williams pp. 156 - 157 figs. Pl. XIV, figs. 6-17 |
| 1977 | Epacroplecia grayiae Mitchell |
| 2014 | Craigella grayiae 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.
†Craigella grayiae Davidson 1870
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Williams 1962 | Trigonal, unequally biconvex Epacroplecia with a short hinge-line less than one-half the maximum width of the shell; adult brachial valves over four-fifths as long as wide and about two-thirds as deep as long and so strongly inflated in a trilobate manner as to produce an auriculate effect in the postero-lateral areas; dorsal fold commonly sharp and arising at about 4 mm. anterior to the umbo; radial ornamentation consisting of fine, equal costellae, between 6 and 8 per millimetre; ventral umbo commonly long, erect, pedicle valve gently convex and strongly geniculate to project dorsally as a median tongue. |
Measurements
No measurements are available
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| Source: c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: base of the Burrellian to the top of the Cheneyan or 456.60000 to 451.30000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Burrellian | United Kingdom (Scotland) | Epacroplecia grayiae (192745) | |
| Cheneyan | United Kingdom (Scotland) | Epacroplecia grayiae (164412) |