|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Holothuroidea - Apodida - Synaptidae
It was assigned to Calcancoridae by Frizzell and Exline (1955), Deflandre-Rigaud (1962), Frizzell and Exline (1966), Zawidzka (1971) and Soodan (1991); to Apodida by Sepkoski (2002); and to Synaptidae by Reich and Wiese (2010).
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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.