Sphaerexochus is a genus of trilobite from the Middle Ordovician to Late Silurian (468.1 to 418.7 Ma) of Asia, Australia, Europe, and North America.
The type species of the genus is Sphaerexochus mirus Beyrich 1845 (syn. of Sphaerexochus calvus Mc Coy 1846) . Similar and related genus is Pseudosphaerexochus.
Species
Sphaerexochus arenosis Chatterton and Ludvigsen 1977
Sphaerexochus arenosus Chatterton and Ludvigsen 1976
Sphaerexochus atacius Ludvigsen 1979
Sphaerexochus brandlyi Chatterton and Perry 1984
Sphaerexochus bridgei Cooper and Kindle 1936
Sphaerexochus britanicus Dean 1971
Sphaerexochus calvus Mc Coy 1846
Sphaerexochus dimorphus Whittington and Evitt 1953
Sphaerexochus eurys Tripp 1962
Sphaerexochus fibrisulcatus Lu 1975
Sphaerexochus glaber Holloway 1980
Sphaerexochus hapsidotus Whittington and Evitt 1953
Sphaerexochus hiratai Kobayashi and Hamada 1964
Sphaerexochus hisingeri Warburg 1925
Sphaerexochus johnstoni Chatterton and Perry 1984
Sphaerexochus laciniatus Lindström 1885
Sphaerexochus latifrons Angelin 1854
Sphaerexochus molongloensis Chatterton and Campbell 1980
Sphaerexochus parvus Billings 1865
Sphaerexochus pulcher Whittington and Evitt 1953
Sphaerexochus romingeri Hall 1868
Sphaerexochus scabridus Angelin 1854
Sphaerexochus tuberculatus Warburg 1925
Sphaerexochus valcourensis Shaw and Bolton 2011
Sources
Fossils (Smithsonian Handbooks) by David Ward (Page 59) Sphaerexochus in the Paleobiology Database