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Anoptambonitidae
Taxonomy
Anoptambonitidae was named by Roomusoks (1963).
It was assigned to Plectambonitacea by Percival (1979).
It was assigned to Plectambonitacea by Percival (1979).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1963 | Anoptambonitidae Roomusoks p. 231 |
| 1979 | Anoptambonitidae Percival pp. 94 - 96 |
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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.
Fm. †Anoptambonitidae Roomusoks 1963
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G. †Durranella Percival 1979
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†Durranella rugosa Percival 1978
†Durranella septata Percival 1979
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| I. G. Percival 1979 | Piano-convex to concavoconvex, multicostellate or parvicostellate plectambonitaceans; dental plates short to obsolete; ventral muscle field small, bilobed to cordate; ventral median ridge present or absent; cardinal process a single ridge or series of ridges, supported on arched plate overhanging deeply excavated alveolus; dorsal muscle field bisected by median septum generally extending to elevated undercut rim surrounding wide platform. Pseudodeltidium very small or lacking. |