# Eutaw Formation

The Eutaw Formation is a geological formation in North America, within the U.S. states of Alabama, Georgia, and Mississippi. The strata date from the late Coniacian to the early Santonian stage of the Late Cretaceous. It consists of the upper Tombigbee Sand Member and an unnamed lower member. Dinosaur, mosasaur, and pterosaur remains have been recovered from the Eutaw Formation.

## Vertebrate paleofauna
### Cartilaginous fish

Cartilaginous fish of the Eutaw Formation :
| Taxa | Species | State | Notes | Images |
| Archaeolamna | A. kopingensis | Alabama | A lamniform shark | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Borodinopristis | B. schwimmeri | Alabama | A sclerorhynchid | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Brachyrhizodus | B. mcnultyi | Alabama | Myliobatids | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Brachyrhizodus | B. wichitaensis | Alabama | Myliobatids | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Carcharias | C. sp. | Alabama | A lamniform shark | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Cantioscyllium | C. globidens | Alabama | Carpet sharks | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Cantioscyllium | C. decipiens (=C. meyeri or C. saginatus?) | Alabama | Carpet sharks | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Chiloscyllium | C. greeni | Alabama | A hemiscylliid | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Cretodus | C. semiplicatus | Alabama | A lamniform shark | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Cretalamna | C. appendiculata | Alabama | Otodontids | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Cretalamna | C. serrata | Alabama | Otodontids | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Cretoxyrhina | C. mantelli | Alabama | A lamniform shark | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Edaphodon | E. sp. | Alabama | A chimaera | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Heterodontus? | H. sp. | Alabama | A heterodontiform | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Hybodus | H. sp. | Alabama | A hybodontid | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Ischyrhiza | I. mira | Alabama | A rajiform | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Lissodus (=Lonchidion?) | L. sp. | Alabama | A hybodontid | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Paranomotodon | P. angustidens | Alabama | A lamniform shark | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Pseudocorax | P. laevis | Alabama | A lamniform shark | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Pseudohypolophus (=Brachyrhizodus?) | P. mcnultyi | Alabama | A rajiform | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Ptychodus | P. mortoni | Alabama | Ptychodontids | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Ptychodus | P. polygyrus | Alabama | Ptychodontids | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Ptychodus | P. rugosus | Alabama | Ptychodontids | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Ptychotrygon | P. triangularis (=P. vermiculata and/or P. chattahoochiensis?) | Alabama | A ptychotrygonid | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Rajiformes indet. | | Alabama | | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Scapanorhynchus | S. raphiodon | Alabama | Lamniform sharks | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Scapanorhynchus | S. texanus | Alabama | Lamniform sharks | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Sclerorhynchus? | S. sp. | Alabama | A rajiform | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Squalicorax | S. falcatus | Alabama | Lamniform sharks | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Squalicorax | S. kaupi | Alabama | Lamniform sharks | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Squalicorax | S. pristodontus | Alabama | Lamniform sharks | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |
| Squatina | S. hassei | Alabama | A squatinid | Tooth of Cretoxyrhina mantelli Ischyrhiza mira rostral spines Teeth of Scapanorhynchus texanus Squalicorax falcatus |

### Bony fish

Bony fish of the Eutaw Formation :
| Taxa | Species | State | Notes | Images |
| Albula | A. dunklei | Alabama | A bonefish | Enchodus petrosus Protosphyraena Stratodus Xiphactinus audax |
| Anomoeodus | A. phaseolus | Alabama | A pycnodontid | Enchodus petrosus Protosphyraena Stratodus Xiphactinus audax |
| Atractosteus | A. sp.? | Alabama | A gar | Enchodus petrosus Protosphyraena Stratodus Xiphactinus audax |
| Bananogmius | B. sp. | Alabama | A plethodid | Enchodus petrosus Protosphyraena Stratodus Xiphactinus audax |
| Belonostomus | B. sp. | Alabama | An aspidorhynchiform | Enchodus petrosus Protosphyraena Stratodus Xiphactinus audax |
| Enchodus | E. petrosus | Alabama | An enchodontid | Enchodus petrosus Protosphyraena Stratodus Xiphactinus audax |
| Hadrodus | H. priscus | Alabama | A pycnodontid | Enchodus petrosus Protosphyraena Stratodus Xiphactinus audax |
| Lepisosteus | L. sp. | Alabama | A gar | Enchodus petrosus Protosphyraena Stratodus Xiphactinus audax |
| Mawsonia | M. sp. | Alabama | A coelacanthiform fish | Enchodus petrosus Protosphyraena Stratodus Xiphactinus audax |
| Phacodus | P. puncatatus | Alabama | A pycnodontiform | Enchodus petrosus Protosphyraena Stratodus Xiphactinus audax |
| Protosphyraena | P. sp. | Alabama | A pachycormiform | Enchodus petrosus Protosphyraena Stratodus Xiphactinus audax |
| Stratodus | S. apicalis | Alabama | An aulopiform | Enchodus petrosus Protosphyraena Stratodus Xiphactinus audax |
| Xiphactinus | X. audax | Alabama | An ichthyodectid | Enchodus petrosus Protosphyraena Stratodus Xiphactinus audax |

### Turtles

Turtles of the Eutaw Formation :
| Taxa | Species | State | Notes | Images |
| Chedighaii | C. barberi | Alabama | A bothremydid | Protostega gigas |
| Protostega | P. gigas | Alabama | A protostegid | Protostega gigas |
| Thinochelys | T. sp. | Alabama | | Protostega gigas |
| Toxochelys | T. sp. | Alabama | | Protostega gigas |
| Trionychidae indet. | | Alabama | | Protostega gigas |

### Plesiosaurs

Plesiosaurs of the Eutaw Formation :
| Taxa | Species | State | Stratigraphic position | Abundance | Notes | Images |
| Discosaurus | D. vetustus | Alabama | | | An elasmosaurid | Vertebrae of D. vestutus |
| Elasmosauridae indet. | | Alabama | | | | Vertebrae of D. vestutus |

### Mosasaurs

Mosasaurs of the Eutaw Formation :
| Taxa | Species | State | Notes | Images |
| Clidastes | Clidastes sp. | Alabama | A mosasaurine | Eonatator sternbergii Platecarpus tympaniticus Tylosaurus proriger skull |
| Eonatator | E. sternbergii | Alabama | A halisaurine E. sternbergii was formerly classified as Halisaurus sternbergii | Eonatator sternbergii Platecarpus tympaniticus Tylosaurus proriger skull |
| Globidens | G. alabamaensis | Alabama | A mosasaurine | Eonatator sternbergii Platecarpus tympaniticus Tylosaurus proriger skull |
| Platecarpus | P. tympaniticus | Alabama | A plioplatecarpine | Eonatator sternbergii Platecarpus tympaniticus Tylosaurus proriger skull |
| Plioplatecarpus | P. sp. | Alabama | A plioplatecarpine | Eonatator sternbergii Platecarpus tympaniticus Tylosaurus proriger skull |
| Selmasaurus | S. russelli | Alabama | A plioplatecarpine | Eonatator sternbergii Platecarpus tympaniticus Tylosaurus proriger skull |
| Tylosaurus | T. nepaeolicus | Alabama | Tylosaurines | Eonatator sternbergii Platecarpus tympaniticus Tylosaurus proriger skull |
| Tylosaurus | T. proriger | Alabama | Tylosaurines | Eonatator sternbergii Platecarpus tympaniticus Tylosaurus proriger skull |

### Crocodylians

Crocodylians of the Eutaw Formation :
| Genus | Species | State | Notes | Images |
| Borealosuchus | B. sp. | Alabama | An eusuchian | A skull of Deinosuchus |
| Deinosuchus | D. rugosus? | Alabama | An alligatoroid | A skull of Deinosuchus |
| Leidyosuchus | L. sp. | Alabama | An alligatoroid | A skull of Deinosuchus |

### Ornithodires

Dinosaur feathers have been found in the Ingersoll Shale of Georgia, which is a subunit of the Eutaw Formation. Indeterminate hadrosaurid remains have been found in Mississippi. Ornithomimosaurs of medium-size and large-size have also been unearthed in Mississippi.
Ornithodires of the Eutaw Formation :
| Genus | Species | State | Stratigraphic position | Abundance | Notes | Images |
| Lophorhothon | L. atopus | Alabama | | | A hadrosauromorph dinosaur | Illustration of a fossil of Lophorhothon Pteranodon sp. |
| Pteranodon | Indeterminate | Georgia | | | A pteranodontid pterosaur | Illustration of a fossil of Lophorhothon Pteranodon sp. |