Hemithecella abrupta (FOSSIL) Stinchcomb & Darrough,1995 †
Chelodes actinis (FOSSIL) Cherns, 1998 †
Conodia acuminata (FOSSIL) Stinchcomb & Darrough,1995 †
Chelodes bergmani (FOSSIL) Davidson & King, 1874 †
Chelodes cooperi (FOSSIL) (J.R.M. Bergenhayn,1960 †)
Spicuchelodes cressmani (FOSSIL) (Pojeta & Runnegar,1976 †)
Hemithecella eminensis (FOSSIL) Stinchcomb & Darrough,1995 †
Matthevia erecta (FOSSIL) Pojeta & al., 2005 †
Hemithecella expansa (FOSSIL) Butts, 1941 †
Conodia levicosta (FOSSIL) Stinchcomb & Darrough,1995 †
Eukteanochiton milleri (FOSSIL) Vendrasco & Runnegar,2004 †
Chelodes mirabilis (FOSSIL) Butts, 1941 †
Robustum nodum (FOSSIL) Stinchcomb & Darrough,1995 †
Robustum phallerium (FOSSIL) Stinchcomb & Darrough,1995 †
Hemithecella quinquelites (FOSSIL) Stinchcomb & Darrough,1995 †
Plectrochiton tegulus (FOSSIL) Cherns, 1998 †
Matthevia variabilis (FOSSIL) Walcott, 1885 †
Matthevia wahwahensis (FOSSIL) Vendrasco & Runnegar,2004 †
Matthevia walcotti (FOSSIL) Runnegar & al., 1979 †
Chelodes whitehousei (FOSSIL) Runnegar & al., 1979 †