Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Cephalopoda
Subclassis: †Ammonoidea
Ordo: †Ammonitida
SubOrdo: †Ammonitina
Superfamilia: Hoplitaceae
Familia: Engonoceratidae
Genera: Engonoceras
Engonoceras belviderense (Cragin, 1894)
Engonoceras complicatum Hyatt, 1903
Engonoceras duboisi Latil, 1989
Engonoceras elegans Kennedy et al., 1998
Engonoceras emarginatum (Cragin, 1893)
Engonoceras gibbosum Hyatt, 1903
Engonoceras hilli Böhm, 1898
Engonoceras iris Spath, 1924
Engonoceras pierdenale (Von Buch, 1848)
Engonoceras pierdenalis Von Buch, 1848
Engonoceras retardum Hyatt, 1903
Engonoceras serpentinum (Cragin, 1900)
Engonoceras stolleyi Böhm, 1898
Engonoceras subjectum Hyatt, 1903
Engonoceras wilkinsoni Packard, 1956
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