|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Ophiuroidea - Phrynophiurida - Eospondylidae
It was assigned to Eoluidiidae by Schuchert (1915); to Hallasteridae by Spencer (1925) and Lehmann (1957); to Lapworthuridae by Owen (1965); to Eospondylidae by Spencer and Wright (1966) and Boczarowski (2001); and to Phrynophiurida by Sepkoski (2002).
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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.