The Echinothurioida are an order of sea urchins in the class Echinoidea. Echinothurioids are distinguished from other sea urchins by the combination of a flexible test and hollow spines. The membrane around the mouth contains only simple plates, in contrast to the more complex mouth parts of their close relatives, the Diadematoida. They are nearly all deepsea dwellers.
^Kroh, Andreas (2012). Kroh A, Mooi R (eds.). "Echinothurioida". World Echinoidea Database. World Register of Marine Species. Retrieved 2012-12-07.
The Echinothurioida are an order of sea urchins in the class Echinoidea. Echinothurioids are distinguished from other sea urchins by the combination of...
common clade Carinacea, basal groups Aspidodiadematoida, Diadematoida, Echinothurioida, Micropygoida, and Pedinoida are comprised in a common basal clade...
(Valvatida) Euretaster insignis (Velatida) Order Diadematoida Order Echinothurioida Order Pedinoida Superorder Echinacea Order Arbacioida Order Echinoida...
The Echinothuriidae are a family of sea urchins in the order Echinothurioida. Due to their soft skeletons, most are called "leather urchins", but species...
Echinacea Order Arbacioida Order Camarodonta Order Stomopneustoida Order Echinothurioida Infraclass Irregularia Superorder Atelostomata Order Holasteroida Order...
distinguishing them from the closely related orders Diadematoida and Echinothurioida, which possess only hollow spines. Barnes, Robert D. (1982). Invertebrate...
Phormosoma placenta is a species of sea urchin in the order Echinothurioida. It is a deepwater species, seldom being found at depths less than 500 m (1...
Phormosomatidae is a family of echinoderms belonging to the order Echinothurioida. Genera: Hemiphormosoma Mortensen, 1934 Paraphormosoma Mortensen, 1934...
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