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Scaphites

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Scaphites (Genus of Ammonite)

Scaphites is an extinct genus of heteromorph ammonites that lived during the Late Cretaceous period, approximately 100 to 66 million years ago. Belonging to the subclass Ammonoidea, Scaphites are known for their distinctive and unusual shell shape.

Morphology and Shell Structure

The shell of Scaphites begins with a tightly coiled spiral (known as the juvenile or inner whorls) which later becomes partially uncoiled in the adult stage, forming a characteristic U-shaped body chamber. This heteromorph growth pattern distinguishes them from the more regularly coiled ammonites. The outer whorl typically curves back toward the inner whorls, giving the shell a “hooked” or “shepherd’s crook” appearance.

Geological and Geographic Distribution

Fossils of Scaphites are widely distributed and have been found on every continent except Antarctica. They are particularly common in North America and Europe, often used as index fossils for correlating the age of marine strata from the Turonian to Maastrichtian stages of the Cretaceous.

Paleoecology

Scaphites were marine cephalopods, related to modern squids and octopuses, but with an external shell. Their morphology suggests a lifestyle that was probably nektobenthic—they swam close to the seafloor, potentially with limited mobility compared to more streamlined ammonites.

Paleontological Significance

Because of their rapid evolutionary rates and wide geographic range, Scaphites species are valuable biostratigraphic markers in Cretaceous rock layers. They help geologists date and correlate sedimentary formations across large regions.

Scaphites

VERY RARE Fossil Heteromorph Ammonite SCAPHITES NODOSUS – Fox Hills Formation, Maastrichtian, Cretaceous: South Dakota, USA

VERY RARE Fossil Ammonite SPHENODISCUS LOBATUS – Fox Hills Formation, Maastrichtian, Cretaceous: South Dakota, USA – Genuine & Certified

VERY RARE Fossil Heteromorph Ammonite HOPLOSCAPHITES NEBRASCENSIS Multi Block – Fox Hills Formation, Maastrichtian, Cretaceous: USA

VERY RARE Fossil Heteromorph Ammonite DISCOSCAPHITES NEBRASCENSIS with Gastropods – Fox Hills Formation, Maastrichtian, Cretaceous: USA

VERY RARE Fossil Heteromorph Ammonite DISCOSCAPHITES GULOSUS – Fox Hills Formation, Maastrichtian, Cretaceous: South Dakota, USA

VERY RARE Fossil Heteromorph Ammonite HOPLOSCAPHITES NICOLLETII – Fox Hills Formation, Maastrichtian, Cretaceous: South Dakota, USA

RARE Fossil Heteromorph Ammonite Scaphites similis – Lower Cenomanian, Cretaceous – Sarthe, France – Alice Purnell Collection

RARE Fossil Heteromorph Ammonite Scaphites equalis – Lower Cenomanian, Cretaceous – Seine-Maritime, France – Alice Purnell Collection

RARE: Hoploscaphites nicoletti Fossil Ammonite – Maastrichtian, Cretaceous – Pierre Shale – South Dakota, USA – Alice Purnell Collection

Fossil Scaphite Heteromorph Uncoiled Ammonite Scaphites obliquus, Cenomanian, Cretaceous: GLYNDE, United Kingdom – COA

Fossil Scaphite Heteromorph Uncoiled Ammonite Scaphites equalis, Lower Cenomanian, Cretaceous: Sarthe, France – Genuine Specimen with COA

Fossil Scaphite Heteromorph Uncoiled Ammonite Scaphites equalis, Lower Cenomanian, Cretaceous: Sarthe, France – Genuine Specimen with COA

Fossil Scaphite Heteromorph Uncoiled Ammonite Scaphites equalis, Lower Cenomanian, Cretaceous: Sarthe, France – Genuine Specimen with COA

Fossil Scaphite Heteromorph Uncoiled Ammonite Scaphites obliquus, Upper Albian, Cretaceous: Lorraine, France – Genuine Specimen with COA

Fossil Scaphite Heteromorph Uncoiled Ammonite Scaphites obliquus, Upper Albian, Cretaceous: Lorraine, France – Genuine Specimen with COA

Fossil Scaphite Heteromorph Uncoiled Ammonite Scaphites obliquus, Upper Albian, Cretaceous: Lorraine, France – Genuine Specimen with COA

Fossil Scaphite Heteromorph Uncoiled Ammonite Scaphites obliquus, Upper Albian, Cretaceous: Lorraine, France – Genuine Specimen with COA

Fossil Scaphite Heteromorph Uncoiled Ammonite Scaphites obliquus, Upper Albian, Cretaceous: Lorraine, France – Genuine Specimen with COA

Fossil Scaphite Heteromorph Uncoiled Ammonite Scaphites obliquus, Upper Albian, Cretaceous: Lorraine, France – Genuine Specimen with COA

VERY RARE Heteromorph Ammonite Scaphites Discoscaphites (Iridescent), Pierre Shales, Maastrichtian, Late Cretaceous: Egremont, USA – COA

VERY RARE Heteromorph Ammonite Scaphites Discoscaphites, Pierre Shales, Maastrichtian, Late Cretaceous: South Dakota, USA – COA

VERY RARE Heteromorph Ammonite Scaphites Discoscaphites nicolleti, Pierre Shales, Maastrichtian, Late Cretaceous: South Dakota, USA – COA

VERY RARE Heteromorph Ammonite Scaphites Discoscaphites conradi, Pierre Shales, Maastrichtian, Late Cretaceous: South Dakota, USA – COA

VERY RARE Heteromorph Ammonite Scaphites Clioscaphites montanai, Santonian, Cretaceous: Montana, USA – Genuine Fossil with COA

VERY RARE Heteromorph Ammonite Scaphites Desmoscaphites balsleri, Santonian, Cretaceous: Montana, USA – Genuine Fossil with COA

VERY RARE Heteromorph Ammonite Scaphites Acanthoscaphites sp. (cf. tridens), Santonian, Cretaceous: Montana, USA – COA

VERY RARE Heteromorph Ammonite Scaphites Jeletzkytes nodosus, Santonian, Cretaceous: Montana, USA – Genuine Fossil with COA

VERY RARE Heteromorph Ammonite Scaphites – Discoscaphites conradi, Pierre Shales, Maastrichtian, Late Cretaceous: Egremont, USA – COA

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Age