Stenomasteridae

Stenomasteridae

[‚sten·ə·mas′ter·ə‚dē]
(paleontology)
An extinct family of Euechinoidea, order Holasteroida, comprising oval and heart-shaped forms with fully developed pore pairs.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.