Contributed by Andreas Kroh, November 2011
Micrasterine spatangoids with:
|Range||Eocene to Recent; Indo-Pacific.|
|Remarks|| Distinguished from Spatangidae and Echinocardiidae by their long, wedge-shaped labral plate and short triangular sternum. Resembling Loveniidae in plastron structure but with more strongly indented episternal plates, a shield-shaped subanal fasciole and usually with occluded plates at the ends of the posterior petals.