Author	Contenent	Country	Date	Period	Genus
Bolton	NA	Canada	1957	Silurian	Orthorhynchula
Greger	NA	USA - MO	1936	Ordovician	Orthorhynchula
Howe	NA	USA - KY	1979	Ordovician	Orthorhynchula
Reed	Europe	Norway	1932	Ordovician	Orthorhynchula
Ruedemann	NA	USA - NY	1925	Ordovician	Orthorhynchula
Southerland	NA	USA - VA	1960	Ordovician	Orthorhynchula
Wilson	NA	USA - TN	1948	Ordovician	Orthorhynchula