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Orthambonites ardmillanensis
Taxonomy
Plectorthis ardmillanensis was named by Reed (1917).
It was recombined as Orthambonites ardmillanensis by Williams (1962).
It was recombined as Orthambonites ardmillanensis by Williams (1962).
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.
†Orthambonites ardmillanensis Reed 1917
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Williams 1962 | Subrectangular, gently biconvex Orthambonites with rectangular or acute cardinal angles; brachial valve less convex, almost two-thirds as long as wide, ornamentation essentially finely costate consisting of about 38 narrowly rounded costae but associated with a few secondary costellae developed near the median line; ventral muscle-scar short, subcordate, extending anteriorly for about one-fifth the length of the valve. |
Measurements
No measurements are available
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| Source: g = genus, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Hendy et al. 2009, Aberhan et al. 2004 | |||||
Age range: Burrellian or 456.60000 to 452.50000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Burrellian | United Kingdom (Scotland) | Orthambonites ardmillanensis (165046 165047 165048) |