Class Cephalopoda – Virtual Teaching Collection

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This virtual teaching collection was last curated by Jonathan Hendricks on Aug. 27, 2018.  Creative Commons License Each model is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. Unless otherwise indicated, each model was created by Emily Hauf using specimens at the Paleontological Research Institution, Ithaca, New York.

An associated chapter about the Class Cephalopoda is now available on the Digital Encyclopedia of Ancient Life.

Subclass Nautiloidea

Order Actinocerida


Actinoceras beloitense from the Ordovician Platteville Limestone of Ogle County, Illinois (PRI 70326). Length of specimen is approximately 9 cm. 

Order Orthocerida


Treptoceras cf. duseri from the Ordovician Richmondian Stage of Cincinnati, Ohio (PRI 45492). Maximum length of specimen is approximately 17 cm.


Order Pseudorthocerida

Spyroceras sp. from the Devonian of Onondaga County, New York. Length of specimen is approximately 4.5 cm.

Order Oncocerida


Oxygonioceras aequale from the Silurian of Prague, Czech Republic (PRI 70586). Maximum length of specimen is approximately 9 cm.

Order Discosorida


Westonoceras sp. from the Ordovician Galena Formation of Fillmore County, Minnesota (PRI 70364). Maximum length of specimen (not including surrounding rock matrix) is approximately 5.5 cm.


Phragmoceras discrepans from the Silurian of Prague, Czech Republic (PRI 70583). Specimen is from the collections of the Paleontological Research Institution. Maximum length of specimen is approximately 7 cm.

Order Nautilida


Modern specimen of the chambered nautilus cephalopod Nautilus pompilius from the Philippines (PRI 70573). Maximum dimension of specimen is approximately 17.5 cm.


Casteroceras alternatum from the Devonian Marcellus Shale (Cherry Valley Limestone Member) of Madison County, New York (PRI 5363).


Tetranodoceras transversum from the Marcellus Shale (Cherry Valley Limestone Member) of Cayuga County, New York (PRI 5365).


Eutrephoceras dekayi from the Cretaceous Pierre Shale of the Black Hills of South Dakota (PRI 44557). Maximum diameter of specimen is approximately 6 cm.

Subclass Ammonoidea

Order Agoniatitida


Holotype of Agoniatites intermedius (PRI 5370); from the Devonian Cherry Valley Limestone of Cayuga County, New York.

Order Goniatitida


Agathiceras ciscoense from the Pennsylvanian Wayland Shale of Brown County, Texas (PRI 76762). Maximum diameter of specimen is approximately 3.5 cm.

Tornoceras uniangulare from the Devonian Geneseo Shale of Tomkins County, New York (PRI 55004). Maximum diameter of specimen is approximately 6 cm.

Order Prolecanitida


Medlicottia intermedia from the Permian of Kazakhstan (PRI 70568). Maximum diameter of specimen is approximately 4.5 cm.

Order Ceratitida


Gymnotoceras beachi from the Triassic Toad Formation of British Columbia (PRI 43629). Maximum diameter is approximately 4.5 cm.

Order Ammonitida


Tightly-coiled ammonites


Evolute shells

Gunnarites sp. from the Cretaceous Lopez de Bertodano Formation of Snow Hill Island, Antarctica (PRI 61543). Diameter of specimen (not including surrounding rock) is approximately 9 cm. 


Teloceras sp. from the Jurassic of Calvados, France (PRI 76759). Maximum diameter of specimen is approximately 4.5 cm.


Dactylioceras commune from the Jurassic of Dorset, England (PRI 76785). Maximum diameter of specimen is approximately 4.5 cm.


Cadicone shells

Cadoceras sublaeve from the Jurassic (Callovian) of Gloucestershire, England (PRI 70580). Largest dimension is about 5.5 cm.


Involute shells

Engonoceras pierdenale from the Cretaceous Comanche Peak Limestone of Texas (PRI 76761). Maximum diameter of specimen is approximately 16 cm.


Oppelia subradiata from the Jurassic Interior Oolite of de Bayeux, France. Maximum diameter of specimen is approximately 10 cm.


Baculites (Family Baculitidae)


Baculites compressus from the Cretaceous Pierre Shale of South Dakota (PRI 44571). Specimen is approximately 15.5 cm.


Baculites sp. from the Cretaceous Pierre Shale of Wasta, South Dakota (PRI 70605). Maximum length of specimen is approximately 8.5 cm.


Baculites sp. from the Cretaceous Pierre Shale of Wasta, South Dakota (PRI 70605). Maximum length of specimen is approximately 7 cm.


Heteromorph (irregularly coiled) ammonites


Diplomoceras maximum, on display at the Museum of the Earth in Ithaca, New York (PRI 13889). This specimen was discovered by Dr. William Zinsmeister and Dr. Anton Oleinik in Cretaceous-aged rocks on Seymour Island, Antarctica. The complete length of this twisted ammonoid’s shell is approximately 4 meters.


Hypoturrilites gravesianus from the Cretaceous of Kent, England (PRI 76777). Length of specimen is approximately 10.5 cm.


Hoploscaphites nebrascensis from the Cretaceous Fox Hills Formation of South Dakota (PRI 76775). Longest dimension of specimen is approximately 8.5 cm.

Order Belemnitida


Pachytheuthis densus from the Jurassic of Wyoming (PRI 70604). Length of specimen is approximately 11.5 cm.


Cylindroteuthis oweni from the Jurassic Oxford Clay of Peterborough, England (PRI 70603). Length of specimen is approximately 9.5 cm.