The figure below shows the distribution of samples containing the trilobite Ceraurus.

[ Ceraurus distribution ]

Ceraurus is an uncommon trilobite in the MRV strata.

Ceraurus Green, 1832 [*C. pleurexanthemus]
Glabella expanding forward, with 3 pairs of short lateral furrows; eyes set well away from glabella, opposite 3p; fixigenae with long genal spines. Thoracic segments generally 11. Pygidium with long pair of axially recurved pleural spines from anterior segment. Surface tuberculation coarse.
M. Ord. - U. Ord., Europe, Greenland, North America, Himalayas
Family Cheiruridae Salter, 1864
Pleurae with pointed or bluntly rounded spines, and oblique or transverse pleural furrows, in some genera represented by row of pits, or effaced. Pygidium with 2 to 4 pairs of pleural ribs and spines; axial rings few. Surface commonly tuberculate, pitted, or both. Appendages only of Ceraurus described; antennae uniramous, other appendages biramous, with gill branches bearing filaments only on distal segments.
L. Ord. - M. Dev.
Order Phacopida Salter, 1864

NOTE: The classification of trilobites has undergone several revisions since the 1959 publication of Volume O of the Treatise. The classification presented here only represents a starting point for the search for further information.

Treatise on Invertebrate Paleontology, O433.