Bucanopsis imbricatus (FOSSIL) (Weir) † UK, England, Northumberland
Bellerophon imperforatus (FOSSIL) Whidborne, 1892 † UK, England, Torbay
Cymbularia impressa (FOSSIL) Ríha, 1936 †
Bellerophon impressus (FOSSIL) L. Waagen, 1880 † Pakistan, Punjab, Sargodha
Bellerophon incertus (FOSSIL) Loczy, 1898 † China, Guizhou, Anshun
Bellerophon incomptus (FOSSIL) Gurley, 1884 † USA, Illinois, Champaign
Sphaerocyclus iners (FOSSIL) Spitz, 1907 † Austria, Steiermark
Bellerophon insculptus (FOSSIL) de Koninck, 1883 † Belgium, Liége
Bucanopsis interlineatus (FOSSIL) (Portlock, 1843 †) Northern Ireland
Bellerophon interstrialis (FOSSIL) F. McCoy, 1847 † Australia, Dunvegan
Bellerophon irregularis (FOSSIL) Wang, 1980 † China, Guizhou, Bijie
Bellerophon isfarensis (FOSSIL) Licharev & Netschajev,1956 †
Khumerspira ishii (FOSSIL) Murata, 1974 † Cambodia, BC?ntC©ay MC©anchey
Cymbularia janica (FOSSIL) Horný, 1963 †
Bellerophon jeffersonensis (FOSSIL) Weller, 1906 † USA, Missouri, Jefferson
Waagenella jonesianus (FOSSIL) (de Koninck, 1863 †) Cambodia, Sisophon
Joleaudella karki (FOSSIL) Öpik, 1930 †
Sphenosphaera kepinensis (FOSSIL) Yü, 1961 †
Pharkidonotus khairliensis (FOSSIL) Reed, 1944 † Afghanistan, Ghor, Shahrak
Pharkidonotus khaonoiensis (FOSSIL) A. Nützel& Ketwetsuriya, 2016 † Thailand, Nakhonsawan
Bellerophon kingorum (FOSSIL) E.L. Yochelson, 1960 † USA, Texas, Brewster
Cymbularia klouceki (FOSSIL) Horný, 1997 † Czech Republic, Prague
Aglaoglypta koeneni (FOSSIL) (A.H. Clarke, 1904 †) USA, New York, Yates
Teutonophon konincki (FOSSIL) (Weir, 1931 †) Belgium, Liége
Bellerophon kyndalynensis (FOSSIL) E.K. Yoo, 1994 † Australia, Gunnedah
Pharkidonotus labioreflexus (FOSSIL) Sturgeon, 1964 † USA, Ohio, Muskingum
Bellerophon labryrinthoides (FOSSIL) Whidborne, 1896 † UK, Devon
Aglaoglypta labyrinthodes (FOSSIL) (Whidborne, 1896 †) France, Nord-Pas-de-Calais, Pas-de-Calais
Bellerophon lamellosus (FOSSIL) C. Gemmellaro, 1889 † Italy, Sicily, Palermo
Bucanopsis latevittatus (FOSSIL) (Lindström, 1884 †) Sweden, Wialmsudd
Bellerophon laticallis (FOSSIL) Hoare & al., 1997 †
Bellerophon latisulcatus (FOSSIL) Weir, 1931 † Belgium, Liége
Bellerophon latofasciatus (FOSSIL) C.L.F. von Sandberger& C.L.F. von Sandberger, 1853 †
Sphenosphaera laurentinus (FOSSIL) (Twenhofel, 1928 †) Canada, Quebec, Minganie--Basse-Côte-Nord
Bellerophon ledburiensis (FOSSIL) Reed, 1921 † UK, England, Herefordshire