Mooreville Chalk

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Mooreville Chalk
Demopolis Chalk Formation
OverliesEutaw Formation
Lithology
PrimaryChalk
Location
RegionAlabama, Mississippi
CountryUnited States

The Mooreville Chalk is a geological

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.[2] Dinosaur, mosasaur, and primitive bird remains are among the fossils that have been recovered from the Mooreville Chalk Formation.[1][2][3]

Fish

Cartilaginous fish

Cartilaginous fish
of the Mooreville Chalk Formation
Genus Species Location Stratigraphic position Abundance Notes Images

Cretolamna

C. appendiculata[3]

A lamniform

Cretoxyrhina mantelli
Squalicorax sp.

Cretoxyrhina

C. mantelli[3]

A lamniform

Edaphodon

E. barberi[4]

Chimaeriforms

E. mirificus[4]

Ischyodus

I. williamsae[4]

A chimaeriform

Odontaspis

O. cuspidata

A lamniform

Propenser

P. hewletti[4]

Lamniformes

Ptychodus

P. mammillaris[4]

?

Neoselachian incertae sedis

P. mortoni[3]

P. polygyrus[4]

Pseudocorax

P. affinis[4]

Lamniformes

P. laevis[3]

Serratolamna

S. serrata[3]

A lamniform

Scapanorhynchus

S. rhaphiodon[4]

Lamniformes

S. texanus[3]

Squalicorax

S. falcatus[4]

Lamniformes

S. kaupi[3]

Bony fish

Bony fish
of the Mooreville Chalk Formation
Genus Species Location Stratigraphic position Abundance Notes Images

Albula

A. dunklei[4]

An

albuliform
Enchodus petrosus
Saurodon leanus
Xiphactinus audax

Bananogmius

B. crieleyi[4]

A tselfatiiform

Cimolichthys

C. nepaholica[4]

An aulopiform

Enchodus

E. petrosus[4]

An aulopiform

E. saevus[4]

Hoplopteryx

Hoplopteryx sp.[4]

A trachichthyiform

Ichthyodectes

I. ctenodon[4]

An ichthyodectiform

Moorevillia

M. hardi[4]

A tselfatiiform

Pachyrhizodus

P. caninus[4]

A crossognathiform

Saurodon

S. leanus[4]

An ichthyodectiform

Stratodus

S. apicalis[4]

An aulopiform

Xiphactinus

X. audax[4]

An ichthyodectiform

Reptiles

Dinosaurs

Indeterminate hadrosaurid, nodosaurid, dinosaur egg, and ornithomimosaur fossils are known from Mooreville Chalk outcrops in Alabama.[1] The nodosaurid remains most likely belong to a new taxon.[5]

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 Stratigraphic position 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.[1]

Eotrachodon
Ichthyornis dispar
Saurornitholestes

Eotrachodon[6]

E. orientalis

A

hadrosaurid
known from a nearly complete skeleton and nearly complete skull.

Halimornis[1][2]

H. thompsoni[1][2]

"Vertebrae and limb elements."[7]

An

enantiornithine

Ichthyornis[1][2]

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[1]

I. dispar[1][2]

An ichthyornithine.

Lophorhothon[1][3]

L. atopus[1][3]

A primitive species of

hadrosaurid known from only a few skull fragments.[1]

Saurornitholestes[5] S. sp. A dromaeosaurid.

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.[1]

Mosasaurs

Mosasaurs
of the Mooreville Chalk Formation
Genus Species Location Stratigraphic position Abundance Notes Images

Clidastes

C. liodontus[4]

Mosasaurines
Clidastes propython
Eonatator sternbergii
Globidens alabamaensis
Platecarpus tympaniticus
Selmasaurus russelli
Tylosaurus proriger

C. "moorevillensis"[3]

C. propython[4]

Ectenosaurus E. shannoni[8] A
plioplatecarpine

Eonatator

E. sternbergii[3][9]

A

halisaurine
E. sternbergii was formerly classified as Halisaurus sternbergii

E. zangerli [10]

Globidens

G. alabamaensis[3]

A

mosasaurine

Mosasaurus

M. missouriensis[3]

A

mosasaurine

Platecarpus

P. tympaniticus[3]

A

plioplatecarpine

Prognathodon

P. rapax[4]

Mosasaurines

P. solvayi[3]

Selmasaurus

S. russelli[3]

A

plioplatecarpine

Tylosaurus

T. proriger[4]

A

tylosaurine

Plesiosaurs

Plesiosaurs of the Mooreville Chalk Formation
Genus Species Location Stratigraphic position Abundance Notes Images

Trinacromerum

Trinacromerum sp.[3]

Polycotylids
Trinacromerum sp.

Pterosaurs

Pterosaurs of the Mooreville Chalk Formation
Genus Species Location Stratigraphic position Abundance Notes Images

Pteranodon

Pteranodon sp.[3]

Pteranodontids.

Pteranodon sp.

Turtles

Turtles of the Mooreville Chalk Formation
Genus Species Location Stratigraphic position Abundance Notes Images

Bothremys

B. barberi[3]

A pelomedusid.

Protostega gigas

Corsochelys

C. haliniches

A dermochelyid.

Protostega

P. gigas[3]

A protostegid.

Toxochelys

T. moorevillensis[3]

A toxochelyid.

See also

References

  1. ^
    ISBN 0-520-24209-2
    .
  2. ^
    doi:10.1671/0272-4634(2002)022[0170:NEBFTM]2.0.CO;2
    .
  3. ^
    doi:10.1671/0272-4634(2002)022[0091:SDAHSO]2.0.CO;2
    .
  4. ^
    OCLC 50419737
    .
  5. ^
    ISSN 1094-8074
    .
  6. ^ Albert Prieto-Márquez, Gregory M. Erickson & Jun A. Ebersole, 2016, "A primitive hadrosaurid from southeastern North America and the origin and early evolution of ‘duck-billed’ dinosaurs", Journal of Vertebrate Paleontology DOI:10.1080/02724634.2015.1054495
  7. ^ "Table 11.1," in Weishampel, et al. (2004). Page 213.
  8. ISSN 0031-0298
    .
  9. doi:10.1111/j.1096-3642.2005.00152.x
    .
  10. ^ "The relationships of Alabama halisaurine mosasaurs". Academia.edu. Retrieved 10 December 2021.
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