|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Ophiuroidea (brittle star)
It was reranked as the subclass Ophiuroidea by Schuchert (1915), Owen (1965) and Spencer and Wright (1966).
It was assigned to Stelleroidea by Schuchert (1915) and Spencer and Wright (1966); to Echinodermata by Clark (1904), Barnes (1998) and Sepkoski (2002); and to Asterozoa by von Zittel (1895), Owen (1965), Boczarowski (2001), Dean Shackleton (2005) and Blake (2013).
|Year||Name and author|
|1895||Ophiuroidea von Zittel|
|1904||Ophiuroidea Clark p. 433|
|1915||Ophiuroidea Schuchert pp. 267-268|
|1965||Ophiuroidea Owen p. 544|
|1966||Ophiuroidea Spencer and Wright p. U78|
|1998||Ophiuroidea Barnes p. 310|
|2001||Ophiuroidea Boczarowski p. 8|
|2002||Ophiuroidea Sepkoski, Jr.|
|2005||Ophiuroidea Dean Shackleton p. 77|
|2013||Ophiuroidea Blake p. 355|
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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.
|J. Dean Shackleton 2005||Ambulacrals with distal part of perradial bar at same relief as proximal part; distal adambulacral podial flange larger than proximal; adambulacrals reach maximum height at disc centre, becoming smaller proximally; adambulacral groove spines present; convex interradial disc; arm highly separated from interradial disc; first podial pore moves to entirely within circumoral ossicle; proximal part of mouth angle plate developed into flat elongate platform; radial spines present in oral area.|