 In later studies the group was renamed as a radiodont family Tamisiocarididae.Like most radiodonts, cetiocarids have spiny frontal appendages, but in this family the auxiliary spines are fine and densely-arranged, which are modified for use in filter feeding like modern basking sharks and mysticete whales.For example, "Tamisocaris" is estimated to have fed on prey roughly a millimeter in size.