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Amaea (Undiscala)
Taxonomy
Undiscala was named by de Boury (1909) [Sepkoski's age data: T Eo-u T Mi].
It was reranked as Acrilla (Undiscala) by Durham (1937), Durham (1944) and Eames (1952); it was reranked as Amaea (Undiscala) by Glibert (1962).
It was assigned to Acrilla by Durham (1937), Durham (1944) and Eames (1952); to Amaea by Glibert (1962); and to Neotaenioglossa by Sepkoski (2002).
It was reranked as Acrilla (Undiscala) by Durham (1937), Durham (1944) and Eames (1952); it was reranked as Amaea (Undiscala) by Glibert (1962).
It was assigned to Acrilla by Durham (1937), Durham (1944) and Eames (1952); to Amaea by Glibert (1962); and to Neotaenioglossa by Sepkoski (2002).
Subtaxa
Species lacking formal opinion data
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.
Subg. †Amaea (Undiscala) de Boury 1909
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†Acrilla (Undiscala) lolakensis Durham 1937
†Acrilla (Undiscala) olympicensis Durham 1937
†Acrilla (Undiscala) soriensis Eames 1952
†Acrilla (Undiscala) washingtonensis Weaver 1916
Diagnosis
Reference | Diagnosis | |
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J. W. Durham 1937 | Shell solid, medium size; sutures mod- erately deep, whorls convex; numerous non-lamellar axial ribs; spiral ribs about as prominent as axial ribs; basal disk marked by closely spaced spiral ribs; bounded by peripheral keel; aperture nearly round; outer lip usually not thickened, not sinuous, inner lip very thin. |