|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Gastropoda - Calyptraeidae
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.
|B. Kensley and J. Pether 1986||Shell elongate-oval, strongly dorso-ventrally depressed, sides roughly paral- lel, anteriorly evenly rounded, dorsum convex in long axis, dorsal surface with irregular growth lines. Apex terminal on rounded posterior end. Ventral 'shelf' between posterior margin and start of septum. Free edge of septum evenly concave.|