Author	Contenent	Country	Date	Period	Genus
Alekseeva	Europe	Russia	1970	Devonian	Sphaerirhynchia
Alexander	NA	USA TN	1990	Devonian	Sphaerirhynchia
Amsden	NA	USA OK	1958	Devonian	Sphaerirhynchia
Boucot	NA	Canada	1986	Devonian	Sphaerirhynchia
Boucot	NA	Canada	1966	Silurian	Sphaerirhynchia
Calef	Europe	Wales	1974	Silurian	Sphaerirhynchia
Flint	Asia	Australia	1980	Devonian	Sphaerirhynchia
Holland	Europe	Ireland	1965	Silurian	Sphaerirhynchia
Johnson	NA	USA NV	1973	Devonian	Sphaerirhynchia
Johnson	NA	USA NV	1973	Silurian	Sphaerirhynchia
Robertson	Europe	Scotland	1989	Silurian	Sphaerirhynchia
Rubel	Europe	Poland	1978	Devonian	Sphaerirhynchia
Schmidt	Europe	Estonia	1954	Silurian	Sphaerirhynchia
Watkins	NA	USA WI	1993	Silurian	Sphaerirhynchia
Xu	Asia	China	1987	Devonian	Sphaerirhynchia