Atelostomata Explained

The Atelostomata are a type of sea urchins. They are distinguished from other sea urchins by their irregular shape and the absence of a feeding lantern. The group includes the well known heart urchins, as well as some less familiar and extinct forms.

List of orders

• Family † Acrolusiidae Mintz, 1968
• Family † Collyritidae d'Orbigny, 1853
• Family † Disasteridae Gras, 1848
• order Holasteroida (Durham & Melville, 1957)
• order Spatangoida (L. Agassiz, 1840)
• Family † Tithoniidae Mintz, 1968

References

• Book: Barnes, Robert D. . 1982 . Invertebrate Zoology . Holt-Saunders International . Philadelphia, PA. 981. 0-03-056747-5.
• 149864 . Echinoidea . Atelostomata.