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Amphithalmus (Cerostraca)

Gastropoda - Barleeiidae

Taxonomy
Cerostraca was named by Oliver (1915). It is extant.

It was reranked as Amphithalmus (Cerostraca) by Ladd (1966) and Ladd (1972).

It was assigned to Amphithalmus by Ladd (1966) and Ladd (1972).

Synonymy list
YearName and author
1966Amphithalmus (Cerostraca) Ladd p. 62
1972Amphithalmus (Cerostraca) Ladd p. 63

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classGastropoda
RankNameAuthor
subclassCaenogastropoda(Cox 1959)
—Sorbeoconcha(Ponder and Lindberg 1997)
—Hypsogastropoda(Ponder and Lindberg 1997)
superfamilyRissooideaGray 1847
familyBarleeiidaeGray 1857
genusAmphithalmusCarpenter 1864
subgenusCerostraca(Oliver 1915)

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. Amphithalmus (Cerostraca) Oliver 1915
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Diagnosis
ReferenceDiagnosis
H. S. Ladd 1972Thin ovate shells with impressed suture; aperture entire, sometimes detached; outer lip with a varixlike callosity.