Hormotoma funata (FOSSIL) Billings, 1866 †
Murchisonia fusiformis (FOSSIL) (B. Phillips, 1836 †)
Hormotoma gigantea (FOSSIL) (Billings, 1857 †)
Aclisina golconda (FOSSIL) Thein & Nitecki, 1974 †
Cibecuia gouldii (FOSSIL) (Beede, 1907 †)
Murchisonia gourvenneci (FOSSIL) Blodgett & al., 2003 †
Hormotoma gracilens (FOSSIL) R.P. Whitfield, 1889 †
Murchisonia gracilicrista (FOSSIL) E.G. Linsley, 1968 †
Devonocerithioides gracilis (FOSSIL) Heidelberger, 2001 †
Hormotoma gracilis (FOSSIL) (J.W. Hall, 1847 †)
Murchisonia gracilis (FOSSIL) G.A. Goldfuss, 1844 †
Hormotoma gracillima (FOSSIL) Salter, 1859 †
Goniospira gracillima (FOSSIL) J. Perner, 1907 †
Hormotoma grayiana (FOSSIL) J. Donald, 1899 †
Mesocoelia gregaria (FOSSIL) Ruedemann, 1916 †
Morania griffithi (FOSSIL) (J. Donald, 1899 †)
Murchisonia gubleri (FOSSIL) Delpey, 1941 †
Costataenia hayasakai (FOSSIL) A. Nützel & Nakazawa,2012 †
Murchisonia hebe (FOSSIL) Billings, 1874 †
Murchisonia hercynica (FOSSIL) A. Römer, 1843 †
Arribazona hesperita (FOSSIL) B.S. Kues, 1990 †
Wuxuanella hibernia (FOSSIL) (Heidelberger, 2001 †)
Murchisonia holynensis (FOSSIL) Frýda & Manda, 1997 †
Loxisonia hormotoma (FOSSIL) Batten, 1985 †
Hormotoma hyale (FOSSIL) Billings, 1865 †
Hormotoma inceptor (FOSSIL) Longstaff, 1909 †
Mesocoelia iners (FOSSIL) J. Perner, 1907 †
Murchisonia infrequens (FOSSIL) Billings, 1859 †
Diplozone innocens (FOSSIL) J. Perner, 1907 †
Hormotoma insignis (FOSSIL) d''Eichwald, 1860 †
Murchisonia intercedens (FOSSIL) J.W. Hall, 1879 †
Murchisonia intermedia (FOSSIL) Stauffer, 1909 †
Murchisonia jackjelli (FOSSIL) Cook, 1997 †
Mesocoelia janus (FOSSIL) J. Perner, 1907 †
Murchisonia kanekoi (FOSSIL) (T. Kase & Nishida,1986 †)