|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Is something missing? Join the Paleobiology Database and enter the data
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.
|N. Allaire et al. 2017||Rhopalocystis with a theca composed of sixprimary circlets of plates, one basal, one circlet of infralaterals (four plates), one circlet of laterals (four to six plates), and three circlets of radials (perradial areas consisting of columns of three plates); additional secondary plates between infralaterals and laterals (up to three circlets of plates), between laterals and radials (isolated plates or one circlet), and forming sometimes rows between laterals; the basal can be split; radials globularshaped; thecal plates ornamented with continuous vermiculated folds. Stem composed of cylindrical columnals of different sizes, some of them more elongated and nodal-shaped (swollen).|