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Catazyga arcana
Taxonomy
Catazyga arcana was named by Williams (1962). Its type specimen is BB.26733, a shell (exfoliated shell), and it is a 3D body fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 1962 | Catazyga arcana Williams pp. 247 - 248 figs. P1. XXV, figs. 20-23, 27, 28 |
| 2014 | Catazyga arcana 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.
†Catazyga arcana Williams 1962
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Williams 1962 | Subpentagonal, unequally biconvex Catazyga with a medianly subcarinate pedicle valve almost as wide as long and over one-half as deep as wide, and a gently convex brachial valve widely sulcate medianly; ventral umbo strongly incurved, interareas short, about one-half as wide as the maximum width of shell; radial ornamentation essentially finely costate with 3 costae per millimetre at a distance of 7.5 mm. from the umbo; dental lamellae short, ventral muscle-field about two-fifths as long as the pedicle valve and over two-thirds as wide as long; dorsal median septum extending anteriorly for one-half of the length of the brachial valve. |