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Conotreta cuspidata
Taxonomy
Conotreta cuspidata was named by Cooper (1956). Its type specimen is USNM 109716a, a valve (pedicle valve), and it is a 3D body fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 1956 | Conotreta cuspidata Cooper p. 250 figs. Plate 16, B, figures 4-7 |
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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.
†Conotreta cuspidata Cooper 1956
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. A. Cooper 1956 | Shell of moderate size ; pedicle valve nearly circular in outline, lateral profile a narrow wedge. Pseudointerarea triangular, occupying a little more than onethird the width. Apical angle 60° ; lateral angle 50°. Beak bent very slightly posteriorly. Surface ornamented by concentric, low undulations and fine concentric lines.
Brachial valve almost circular, but with the posterolateral margins somewhat shouldered; very gently convex in lateral profile. Median sulcus shallow and narrow, practically obsolete at the front margin. |