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Fardenia scalena
Taxonomy
Fardenia scalena was named by Williams (1962) [= Hemipronites carrickensis Reed 1917, p. 918, pl. xxi, figs. 24--26.
= Hemipronites thomsoni Reed 1917, p. 919, pl. xxi, fig. 27, non fig. 28.]. Its type specimen is BB.15888, a shell (complete shell), and it is a 3D body fossil.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1962 | Fardenia scalena Williams pp. 221 - 222 figs. Pl. XXIII, figs. 2-6 |
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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.
†Fardenia scalena Williams 1962
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Williams 1962 | Variably subtrigonal, unequally biconvex Fardenia with a pedicle valve over three-quarters as long and almost one-fifth as deep as wide and a brachial valve, about one-quarter as deep as wide, rarely shallowly sulcate postero-medianly; hinge-line almost three-quarters of the maximum width of the shell, ventral interarea long, up to one-sixth of the length of the pedicle valve, with a well-developed pseudodeltidium and a large supra-apical foramen, brachial interarea short, chilidium small, obtusely triangular; costellae strong, arising by intercalation or branching, numbering 3 or 4 per millimetre at about 7.5 mm. from the umbo and cancellated by fine concentric lamellae about 10 to the millimetre; dental lamellae long, divergent, ventral muscle-scar subcordate, dorsal median septum weak, vascula media divergent. |