Point A Dam Site (Eocene of the United States)

Also known as Point "A" Dam Site, Conecuh River

Where: Covington County, Alabama (31.4° N, 86.5° W: paleocoordinates 32.4° N, 75.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Tallahatta Formation (Claiborne Group), Lutetian (47.8 - 41.3 Ma)

• Original stratigraphy: "The exposure situated below the Point "A" Dam is in the upper unit of the Tallahatta Formation, which in turn underlies the lowermost member of the Lisbon Formation..." Lat long is for the Point A Dam.

•Later placed in the lowermost Lisbon Formation by Clayton et al., 2013.

• formation-level stratigraphic resolution

Environment/lithology: estuary or bay; poorly lithified, sandy sandstone and poorly lithified claystone

• "The formation consists primarily of sand, sandstone, clay, and claystone, ranging in thickness from 20 to 40 m at the outcropping."

• "The formation consists primarily of sand, sandstone, clay, and claystone, ranging in thickness from 20 to 40 m at the outcropping."

Size class: macrofossils

Preservation: charcoalification

Collection methods: Turtles, snakes, croc (and a charred pine knot possibly used as a "stomach stone") are described herein; at least 21 fish taxa are noted and were in the proccess of being described at the time of this publication.

Primary reference: J. A. Holman and G. R. Case. 1988. Reptiles from the Eocene Tallahatta Formation of Alabama. Journal of Vertebrate Paleontology 8(3):328-333 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 13346: authorized by John Alroy, entered by Robin Whatley on 01.03.2002, edited by Mark Uhen and Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Malacostraca
 Decapoda - Retroplumidae
Costacopluma grayi3 Feldmann and Portell 2007 crab
Chondrichthyes
 Odontaspidida - Jaekelotodontidae
Jaekelotodus robustus2 Leriche 1905 elasmobranch
Jaekelotodus trigonalis Jackel 1895 elasmobranch
 Rajiformes - Rhinobatidae
Rhinobatos sp. Link 1790 guitarfish
Rhinobatos cf. bruxelliensis2 Jaekel 1894 guitarfish
 Myliobatiformes -
Coupatezia woutersi2 Cappetta 1982 stingray
 Myliobatiformes - Mobulidae
Burnhamia sp. Cappetta 1976 stingray
 Myliobatiformes - Gymnuridae
Jacquhermania duponti2 Winkler 1874 stingray
Gymnura sp.2 Van Hasselt 1823 stingray
 Myliobatiformes - Dasyatidae
Dasyatis sp. Rafinesque 1810 whiptail stingray
 Myliobatiformes - Rhinopteridae
Rhinoptera sp.2 Cuvier 1829 cownose ray
 Myliobatiformes - Myliobatidae
Myliobatis sp. Cuvier 1816 eagle ray
Myliobatis toliapicus2 Agassiz 1843 eagle ray
Myliobatis dixoni2 Agassiz 1843 eagle ray
 Pristiformes - Pristidae
Pristis sp.2 Linck 1790 sawfish
Pristis lathami Galeotti 1837 sawfish
 Lamniformes - Carchariidae
Physodon sp. Müller and Henle 1839 mackerel shark
 Lamniformes - Otodontidae
Carcharocles sp. Jordan 1923 mackerel shark
 Lamniformes - Lamnidae
"Carcharocles auriculatus" = Carcharodon auriculatus2
"Carcharocles auriculatus" = Carcharodon auriculatus2 Blainville 1818 white shark
 Lamniformes - Odontaspididae
Odontaspis speyeri sand tiger shark
"Hypotodus cf. verticalis" = Lamna (Odontaspis) verticalis2 Agassiz 1843 sand tiger shark
Sylvestrilamia teretidens2 sand tiger shark
Hypotodus robustus sand tiger shark
Striatolamia cf. striata2 sand tiger shark
Striatolamia macrota Agassiz 1843 sand tiger shark
"Lamna lerichei" = Brachycarcharias lerichei Casier 1946 sand tiger shark
"Brachycarcharias lerichei" = Brachycarcharias lerichei2 Casier 1946 sand tiger shark
"Eugomphodus hopei" = Carcharias sand shark
 Carchariniformes - Carcharhinidae
"Carcharinidae indet." = Carcharhinidae1 Jordan and Evermann 1896 requiem shark
Physogaleus secundus2 Agassiz 1843 requiem shark
Abdounia recticona2 requiem shark
Abdounia minutissima2 requiem shark
Abdounia enniskilleni White 1956 requiem shark
"Galeorhinus recticonus" = Abdounia recticonia Winkler 1873 requiem shark
Galeocerdo latidens2 Agassiz 1843 tiger shark
Rhizoprionodon sp.2 Whitley 1929 sharpnose shark
 Carchariniformes - Triakidae
cf. Galeorhinus sp.2 de Blainville and Prévost 1816 school shark
Pachygaleus lefevrei2 Daimeries 1891 hound shark
 Orectolobiformes - Ginglymostomatidae
Nebrius sp. Rüppell 1837 nurse shark
Nebrius cf. thielensis2 Winkler 1874 nurse shark
 Orectolobiformes - Orectolobidae
 Synechodontiformes - Palaeospinacidae
cf. Synechodus sp.2 Woodward 1888 elasmobranch
Actinopteri
 Elopiformes - Phyllodontidae
Egertonia sp.2 Cocchi 1866
Egertonia isodonta Cocchi 1866
 Albuliformes - Albulidae
Albula sp.2 Gronow 1763 bonefish
 Acanthomorphata - Sphyraenidae
? Sphyraena sp. Walbaum 1792 barracuda
"or Cybium ?"
Sphyraena sp.2 Walbaum 1792 barracuda
 Scombriformes - Scombridae
 Scombriformes - Trichiuridae
Trichiurus sp.2 Linnaeus 1758
Trichiurides sp. Winkler 1874
 Acanthomorphata - Sciaenidae
? Aplodinotus sp. Rafinesque 1818
"or Albula ?"
cf. Fisherichthys sp.2 Weems 1999
 Lophiiformes - Lophiidae
"Trichiurides cf. sagittidens" = Lophius sagittidens2
"Trichiurides cf. sagittidens" = Lophius sagittidens2 Winkler 1874 anglerfish
 Tetraodontiformes - Ostraciidae
 Alepisauriformes - Dercetidae
 Lepisosteiformes - Lepisosteidae
Lepisosteus sp.2 Agassiz 1843 gar
Reptilia
 Testudines -
Chelonioidea indet. Baur 1893 sea turtle
previously identified as Emydid in Holman and Case, 1988 [ref: 688]
 Testudines - Trionychidae
Trionychidae indet.4 Gray 1825 softshell turtle
 Crocodylia - Crocodylidae
Crocodylidae indet. Cuvier 1807 crocodile
all teeth
 Squamata - Palaeophiidae
Palaeophis virginianus Lynn 1934 snake
a range of sizes of vertebrae, including some very small ones
 Squamata - Boidae
Tallahattaophis dunni n. gen. n. sp.
Tallahattaophis dunni n. gen. n. sp. Holman and Case 1988 boa
vertebra
Mammalia
  -
Mammalia indet.1 Linnaeus 1758 mammal
marine mammals
Aetobatis
  - Aetobatidae
"Aetobatis sp." = Aetobatus
"Aetobatis sp." = Aetobatus Blainville 1816
Aetobatus
  - Aetobatidae
"cf. Aetobatus sp." = Aetobatus2
"cf. Aetobatus sp." = Aetobatus2 Blainville 1816