Contributed by Andrew Smith, October 2011
Diagnosis | Euechinoids with:
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Range | Late Triassic to Recent, worldwide |
Species Included | Includes all Euechinoidea with the exception of the Echinothurioida, i.e. Carinacea, and four small orders previously grouped together as the Aulodonta (Diadematoida, Micropygoida, Aspidodiadematoida and Pedinoida). |
Remarks | Regular echinoid members of this clade are distinguished from Cidaroidea by the presence of ambulacral plate compounding and from Echinothurioida by the presence of a single pair of buccal plates and tube-feet to each ambulacral zone on the peristome. The following taxon is currently too poorly known to place with certainty:
Smith, A. B. 1981. Echinoid Palaeobiology. George Allen & Unwin, London. Kroh, A. & Smith, A. B. 2010. The phylogeny and classification of post-Palaeozoic echinoids. Journal of Systematic Palaeontology 8, 147-212. |