|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Holothuroidea - Apodida - Theeliidae
It was assigned to Holothuroidea by Schlumberger (1888); to Theeliidae by Frizzell and Exline (1966), Mostler (1971), Soodan and Whatley (1988) and Soodan (1991); and to Apodida by Sepkoski (2002).
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.