# Mooreville Chalk

The Mooreville Chalk is a geological formation in North America, within the U.S. states of Alabama and Mississippi, which were part of the subcontinent of Appalachia. The strata date back to the early Santonian to the early Campanian stage of the Late Cretaceous. The chalk was formed by pelagic sediments deposited along the eastern edge of the Mississippi embayment. It is a unit of the Selma Group and consists of the upper Arcola Limestone Member and an unnamed lower member. Dinosaur, mosasaur, and primitive bird remains are among the fossils that have been recovered from the Mooreville Chalk Formation.

## Fish
### Cartilaginous fish

Cartilaginous fish of the Mooreville Chalk Formation :
| Genus | Species | Notes | Images |
| Cretolamna | C. appendiculata | A lamniform | Cretoxyrhina mantelli Squalicorax sp. |
| Cretoxyrhina | C. mantelli | A lamniform | Cretoxyrhina mantelli Squalicorax sp. |
| Edaphodon | E. barberi | Chimaeriforms | Cretoxyrhina mantelli Squalicorax sp. |
| Edaphodon | E. mirificus | | Cretoxyrhina mantelli Squalicorax sp. |
| Ischyodus | I. williamsae | A chimaeriform | Cretoxyrhina mantelli Squalicorax sp. |
| Odontaspis | O. cuspidata | A lamniform | Cretoxyrhina mantelli Squalicorax sp. |
| Propenser | P. hewletti | Lamniformes | Cretoxyrhina mantelli Squalicorax sp. |
| Ptychodus | P. mammillaris | ?Neoselachian incertae sedis | Cretoxyrhina mantelli Squalicorax sp. |
| Ptychodus | P. mortoni | | Cretoxyrhina mantelli Squalicorax sp. |
| Ptychodus | P. polygyrus | | Cretoxyrhina mantelli Squalicorax sp. |
| Pseudocorax | P. affinis | Lamniformes | Cretoxyrhina mantelli Squalicorax sp. |
| Pseudocorax | P. laevis | | Cretoxyrhina mantelli Squalicorax sp. |
| Serratolamna | S. serrata | A lamniform | Cretoxyrhina mantelli Squalicorax sp. |
| Scapanorhynchus | S. rhaphiodon | Lamniformes | Cretoxyrhina mantelli Squalicorax sp. |
| Scapanorhynchus | S. texanus | | Cretoxyrhina mantelli Squalicorax sp. |
| Squalicorax | S. falcatus | Lamniformes | Cretoxyrhina mantelli Squalicorax sp. |
| Squalicorax | S. kaupi | | Cretoxyrhina mantelli Squalicorax sp. |

### Bony fish

Bony fish of the Mooreville Chalk Formation :
| Genus | Species | Notes | Images |
| Albula | A. dunklei | An albuliform | Enchodus petrosus Saurodon leanus Xiphactinus audax |
| Bananogmius | B. crieleyi | A tselfatiiform | Enchodus petrosus Saurodon leanus Xiphactinus audax |
| Cimolichthys | C. nepaholica | An aulopiform | Enchodus petrosus Saurodon leanus Xiphactinus audax |
| Enchodus | E. petrosus | An aulopiform | Enchodus petrosus Saurodon leanus Xiphactinus audax |
| Enchodus | E. saevus | An aulopiform | Enchodus petrosus Saurodon leanus Xiphactinus audax |
| Hoplopteryx | Hoplopteryx sp. | A trachichthyiform | Enchodus petrosus Saurodon leanus Xiphactinus audax |
| Ichthyodectes | I. ctenodon | An ichthyodectiform | Enchodus petrosus Saurodon leanus Xiphactinus audax |
| Moorevillia | M. hardi | A tselfatiiform | Enchodus petrosus Saurodon leanus Xiphactinus audax |
| Pachyrhizodus | P. caninus | A crossognathiform | Enchodus petrosus Saurodon leanus Xiphactinus audax |
| Protosphyraena | P. gladius | A pachycormid | Enchodus petrosus Saurodon leanus Xiphactinus audax |
| Saurodon | S. leanus | An ichthyodectiform | Enchodus petrosus Saurodon leanus Xiphactinus audax |
| Stratodus | S. apicalis | An aulopiform | Enchodus petrosus Saurodon leanus Xiphactinus audax |
| Xiphactinus | X. audax | An ichthyodectiform | Enchodus petrosus Saurodon leanus Xiphactinus audax |

## Reptiles
### Dinosaurs

Indeterminate hadrosaurid, nodosaurid, dinosaur egg, and ornithomimosaur fossils are known from Mooreville Chalk outcrops in Alabama. The nodosaurid remains most likely belong to a new taxon.
| Color key Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon | Notes Uncertain or tentative taxa are in small text; crossed out taxa are discredited. |
Dinosaurs reported from the Mooreville Chalk Formation :
| Genus | Species | Location | Material | Notes | Images |
| Angelinornis | A. antecessor | | | A. antecessor was originally described as Plegadornis antecessor, but the generic name Plegadornis was preoccupied, so the genus Angelinornis was erected to contain the species. It was later demonstrated that Angelinornis was a junior synonym of Ichthyornis, although the new combination I. antecessor was held to be valid for a while following the sinking of Angelinornis into Ichthyornis. Later the species would later be considered a junior synonym of the Ichthyornis type species, I. dispar. | Eotrachodon Ichthyornis disparSaurornitholestes |
| Eotrachodon | E. orientalis | Alabama. | | A hadrosaurid known from a nearly complete skeleton and nearly complete skull. | Eotrachodon Ichthyornis disparSaurornitholestes |
| Halimornis | H. thompsoni | Alabama. | "Vertebrae and limb elements." | An enantiornithine | Eotrachodon Ichthyornis disparSaurornitholestes |
| Ichthyornis | I. antecessor | | | The species I. antecessor was made the type species of the genus Angelinornis in 1962. Later, I. antecessor and Angelinornis were shown to be junior synonyms of the Ichthyornis type species, I. dispar | Eotrachodon Ichthyornis disparSaurornitholestes |
| Ichthyornis | I. dispar | Alabama. | | An ichthyornithine. | Eotrachodon Ichthyornis disparSaurornitholestes |
| Lophorhothon | L. atopus | Alabama. | | A primitive species of hadrosaurid known from only a few skull fragments. | Eotrachodon Ichthyornis disparSaurornitholestes |
| Saurornitholestes | S. sp. | | | A dromaeosaurid. | Eotrachodon Ichthyornis disparSaurornitholestes |
| Plegadornis | P. antecessor | | | The name Plegadornis antecessor was applied to a fossil believed to represent a new bird species, but the generic name Plegadornis was preoccupied, so the genus Angelinornis was erected to contain the "new" species. It was later demonstrated that Angelinornis was a junior synonym of Ichthyornis, although the new combination I. antecessor was held to be valid for a while following the sinking of Angelinornis into Ichthtyornis. Later the species would later be considered a junior synonym of the Ichthyornis type species, I. dispar. | Eotrachodon Ichthyornis disparSaurornitholestes |

### Mosasaurs

Mosasaurs of the Mooreville Chalk Formation :
| Genus | Species | Notes | Images |
| Clidastes | C. liodontus | Mosasaurines | Clidastes propython Eonatator sternbergii Globidens alabamaensis Platecarpus tympaniticus Selmasaurus russelli Tylosaurus proriger |
| Clidastes | C. "moorevillensis" | | Clidastes propython Eonatator sternbergii Globidens alabamaensis Platecarpus tympaniticus Selmasaurus russelli Tylosaurus proriger |
| Clidastes | C. propython | | Clidastes propython Eonatator sternbergii Globidens alabamaensis Platecarpus tympaniticus Selmasaurus russelli Tylosaurus proriger |
| Ectenosaurus | E. shannoni | A plioplatecarpine | Clidastes propython Eonatator sternbergii Globidens alabamaensis Platecarpus tympaniticus Selmasaurus russelli Tylosaurus proriger |
| Eonatator | E. sternbergi (sic) | A halisaurine E. sternbergii was formerly classified as Halisaurus sternbergii | Clidastes propython Eonatator sternbergii Globidens alabamaensis Platecarpus tympaniticus Selmasaurus russelli Tylosaurus proriger |
| Eonatator | E. zangerli | | Clidastes propython Eonatator sternbergii Globidens alabamaensis Platecarpus tympaniticus Selmasaurus russelli Tylosaurus proriger |
| Globidens | G. alabamaensis | A mosasaurine | Clidastes propython Eonatator sternbergii Globidens alabamaensis Platecarpus tympaniticus Selmasaurus russelli Tylosaurus proriger |
| Mosasaurus | M. missouriensis | A mosasaurine | Clidastes propython Eonatator sternbergii Globidens alabamaensis Platecarpus tympaniticus Selmasaurus russelli Tylosaurus proriger |
| Platecarpus | P. tympaniticus | A plioplatecarpine | Clidastes propython Eonatator sternbergii Globidens alabamaensis Platecarpus tympaniticus Selmasaurus russelli Tylosaurus proriger |
| Prognathodon | P. rapax | A mosasaurine | Clidastes propython Eonatator sternbergii Globidens alabamaensis Platecarpus tympaniticus Selmasaurus russelli Tylosaurus proriger |
| Selmasaurus | S. russelli | A plioplatecarpine | Clidastes propython Eonatator sternbergii Globidens alabamaensis Platecarpus tympaniticus Selmasaurus russelli Tylosaurus proriger |
| Tylosaurus | T. proriger | A tylosaurine | Clidastes propython Eonatator sternbergii Globidens alabamaensis Platecarpus tympaniticus Selmasaurus russelli Tylosaurus proriger |

### Plesiosaurs

Very rare elasmosaurs are present in this formation.
Plesiosaurs of the Mooreville Chalk Formation :
| Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
| Trinacromerum | Trinacromerum sp. | | | | Polycotylids | Trinacromerum sp. |
| Polycotylus | Polycotylus latipinnis | Alabama | | | Polycotylids | Trinacromerum sp. |

### Pterosaurs

Pterosaurs of the Mooreville Chalk Formation :
| Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
| Pteranodon | Pteranodon sp. | | | | Pteranodontids. | Pteranodon sp. |

### Turtles

Turtles of the Mooreville Chalk Formation :
| Genus | Species | Notes | Images |
| Bothremys | B. barberi | A pelomedusid. | Protostega gigas |
| Corsochelys | C. haliniches | A dermochelyid. | Protostega gigas |
| Protostega | P. gigas | A protostegid. | Protostega gigas |
| Toxochelys | T. moorevillensis | A toxochelyid. | Protostega gigas |