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Orthis cypha
Taxonomy
Orthis cypha was named by James (1874).
It was recombined as Orthis (Platystrophia) cypha by James (1874); it was recombined as Platystrophia cypha by Foerste (1910), Alberstadt (1979) and Alberstadt (1979); it was recombined as Vinlandostrophia cypha by Zuykov and Harper (2007).
It was recombined as Orthis (Platystrophia) cypha by James (1874); it was recombined as Platystrophia cypha by Foerste (1910), Alberstadt (1979) and Alberstadt (1979); it was recombined as Vinlandostrophia cypha by Zuykov and Harper (2007).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1874 | Orthis cypha James |
| 1874 | Orthis (Platystrophia) cypha James p. 20 |
| 1874 | Orthis cypha James p. 20 |
| 1910 | Platystrophia cypha Foerste p. 61 figs. pl. 4 f. 10a-b; pl. 5 f. 11 |
| 1979 | Platystrophia cypha Alberstadt |
| 2007 | Vinlandostrophia cypha Zuykov and Harper figs. pl. 3 f. 4 |
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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.
†Orthis cypha James 1874
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. P. Alberstadt 1979 | Moderate size for genus (best preserved specimen: length, 16.0 mm; hinge width, 26.8 mm; midwidth, 23.7 mm; thickness, 16.1 mm; cardinal extremities acute to right angle. Hinge line the widest part, lateral margins straight, anterior margin straight. Lateral profile unequally biconvex with brachial valve about twice as deep; fold rises steadily from posterior to highest anterior extremity. Fold has four plications, two middle ones prominent with two lateral ones only poorly to moderately developed; six to seven plications on flank. Sulcus deep, bordered on each side by two prominent highly elevated plications. Flank of pedicle valve distinctly concave with asymmetrical plications; plication slopes facing cardinal extremities twice as long as opposite slopes. Flanks of brachial valve slightly convex, uneven plications. |
Measurements
No measurements are available
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| Source: g = genus, o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Hendy 2009, Aberhan et al. 2004, Nesnidal et al. 2013 | |||||
Collections
No collection or age range data are available