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Ovula ishibashii
Taxonomy
Amphiperas isibasii was named by Kuroda (1928).
It was recombined as Pseudosimnia (Margovula) ishibashii by Kira (1962); it was recombined as Ovula ishibashii by Cate (1973) and Ladd (1982).
It was recombined as Pseudosimnia (Margovula) ishibashii by Kira (1962); it was recombined as Ovula ishibashii by Cate (1973) and Ladd (1982).
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.
†Ovula ishibashii Kuroda 1928
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Diagnosis
Reference | Diagnosis | |
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H. S. Ladd 1982 | Shell large, inflated, smooth. Outer lip thickened with strong teeth on the inner .g,ide; poste,riorly, the outer lip forms a rounded loop that unites with a short lov.r fold on ihe inner lip, the structure suppol'lted dorsally by an elevated spirally ridged callus that covers the apex of the shell. |