hyolithid

Etymology

From scientific Latin Hyolithida (order name).

noun

  1. A member of the Hyolithida order of extinct lophophorate animals.“A study of over 1500 specimens of Haplophrentis, a mid-Cambrian hyolithid from the celebrated Burgess Shale in the Canadian Rockies and the Spence Shale from Utah, has revealed the details of its soft parts.”