|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Echinoidea - Tithoniidae
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.
|C. G. Barras 2007||Tithoniids with an endocyclic apical disc (cf. Jesionek Szymanska 1963: text-pl. 13, fig. 9). The peristome is angled to face towards the anterior. Plastron plating is amphisternous (Fig. 12B). The pore pairs are microscopic.|