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Callistadia bella
Taxonomy
Callistadia bella was named by Knight (1945). It is not a trace fossil. Its type locality is USGS 14439, Apache Canyon, Sierra Diablo, which is in a Kungurian shallow subtidal limestone in the Bone Spring Formation of Texas. It is the type species of Callistadia.
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.
†Callistadia bella Knight 1945
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. B. Knight 1945 | This species characterized by relatively few, rather strong, revolving costae, a single major costa above the selenizone, with a few fine lirae in the wide concave interspaces, the selenizone bordered by costae very similar to the one above it, occasionally with a fine lira between them, the nearly vertical outer whorl face with a single costa, somewhat less strong than the others, passing around it slightly below its middle, the base with 10 or 12 costae more closely spaced than those above. |