|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
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.
|M. Salak and H. L. Lescinsky 1999||As for the genus. [ individual consists of several crudely hemi- spherical "cups," composed of calcium carbonate (probably ara- gonite); cups oriented with concave sides facing upward, cups nest eccentrically inside one another, forming stacks; cups at- tached where rims share common margin; attachment zone roughly vertically up stack.]|