Fibulariids include the ovate sea peas and similar micro-echinoids. Many are only a few millimeters in length. The Eocene Lenita israelskyi is known from California (Grant and Hertlein 1938), while Echinocyamus parvus is known from Eocene deposits in the southeastern U.S. (Zachos 2005). Today, Echinocyamus is known principally from European waters.
