PBDB

Hannahatchee Creek ‘‘longwalk’’ outcrop (Cretaceous of the United States)

Where: Stewart County, Georgia (32.2° N, 85.0° W: paleocoordinates 34.1° N, 56.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Blufftown Formation, Campanian (83.6 - 72.1 Ma)

• many layers are fossiliferous, but only one contains vertebrates

• bed-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; argillaceous, silty claystone and fine-grained, concretionary, micaceous, shelly/skeletal, gray, silty, calcareous sandstone

• silty, fine sandy clay, medium sandy clay, silty clay, (several units with varying amounts of silt, sand and clay in each). Unit bearing vertebrates is "Clayey fine sand and silty clay, micaceous, lignitic, very fossiliferous, olive-gray (5 Y 3/2). Calcareous, sandy concretions abundant throughout unit. Zones of molluscan hash locally present. Prominent erosional horizon in lower meter, traceable throughout exposure, features abundant vetebrate bones and teeth, and very-large-oyster bioherm. "

Size class: macrofossils

Preservation: trace, replaced with phosphate

Primary reference: D. R. Schwimmer. 1986. Late Cretaceous fossils from the Blufftown Formation (Campanian) in western Georgia. The Mosasaur 3:109-123 [J. Alroy/E. Leckey/E. Leckey]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 35289: authorized by John Alroy, entered by Erin Leckey on 24.11.2003, edited by Kaitlin Maguire, Mark Uhen and Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

• IHay (1908) reviewed the systematics of the Peritresius ornatus, and included a description that had been reported by Cope (1878). This turtle almost certainly came from this locality. Cope collected other material from the Blufftown for which exact locality information is not available.

Show authors, comments, and common names

unclassified
-	Borodinoptristis schwimmeri⁴ Borodinoptristis schwimmeri⁴
Bivalvia
-	Bivalvia indet. Bivalvia indet. Linnaeus 1758 clam
Ostreida - Gryphaeidae	Exogyra ponderosa Exogyra ponderosa oyster var. erraticostata
Ostreida - Ostreidae	Crassostrea cusseta Crassostrea cusseta oyster
Gastropoda
Naticoidea - Naticidae	"Albula sp." = Polinices "Albula sp." = Polinices Monfort 1810 moon snail
Cephalopoda
Ammonitida - Placenticeratidae	Placenticeras sp. Placenticeras sp. Meek 1876 ammonite
Chondrichthyes
Squatiniformes - Squatinidae	Squatina hassei Squatina hassei Leriche 1929 angel shark
Hybodontiformes - Hybodontidae	Hybodus sp. Hybodus sp. Agassiz 1837 elasmobranch
Hybodontiformes - Lonchidiidae	Lonchidion babulskii Lonchidion babulskii Cappetta and Case 1975 elasmobranch
Sclerorhynchiformes - Sclerorhynchidae	Ischyrhiza mira Ischyrhiza mira Leidy 1856 elasmobranch I. mira mira
Sclerorhynchiformes - Ptychotrygonidae	Ptychotrygon vermiculata Ptychotrygon vermiculata Cappetta 1975 elasmobranch
Myliobatiformes - Rhombodontidae	"Rhombodus levis" = Rhombodus laevis "Rhombodus levis" = Rhombodus laevis Cappetta and Case 1975 stingray
Myliobatiformes - Myliobatidae	Pseudohypolophus sp., Brachyrhizodus wichitaensis Pseudohypolophus sp. Cappetta and Case 1975 eagle ray Brachyrhizodus wichitaensis Romer 1942 eagle ray
Lamniformes - Anacoracidae	Pseudocorax affinis, Squalicorax yangaensis¹, Squalicorax kaupi Pseudocorax affinis Agassiz 1843 mackerel shark Squalicorax yangaensis¹ crow shark Squalicorax kaupi Agassiz 1843 crow shark
Lamniformes - Cretoxyrhinidae	Cretolamna appendiculata, "Plicatolamna borodini" = Cretodus borodini Cretolamna appendiculata Agassiz 1843 mackerel shark C. appendiculata lata "Plicatolamna borodini" = Cretodus borodini Cappetta and Case 1975 mackerel shark
Heterodontiformes - Heterodontidae	Heterodontus sp. Heterodontus sp. de Blainville 1816 bullhead shark
Euselachii - Mitsukurinidae	Scapanorhynchus texanus Scapanorhynchus texanus Roemer 1852 goblin shark
Orectolobiformes - Orectolobidae	Ginglymostoma globidens Ginglymostoma globidens Cappetta and Case 1975 wobbegong
Actinopteri
Elopiformes - Phyllodontidae	Paralbula casei Paralbula casei Estes 1969
Salmoniformes - Enchodontidae	Enchodus cf. petrosus Enchodus cf. petrosus Cope 1874
Ichthyodectiformes - Ichthyodectidae	Xiphactinus audax Xiphactinus audax Leidy 1870
Pycnodontiformes - Pycnodontidae	Anomoeodus phaseolus Anomoeodus phaseolus Hay 1899
Amiiformes - Amiidae	Amiidae indet. Amiidae indet. Huxley 1861 bowfin
Lepisosteiformes - Lepisosteidae	Lepisosteus sp. Lepisosteus sp. Agassiz 1843 gar
Coelacanthimorpha
Coelacanthiformes - Latimeriidae	Megalocoelacanthus dobiei² Megalocoelacanthus dobiei² Schwimmer et al. 1994 coelacanth
Reptilia
Testudines - Cheloniidae	Cheloniidae indet. Cheloniidae indet. Bonaparte 1832 sea turtle
Testudines - Bothremydidae	"Bothremys barberi" = Chedighaii barberi "Bothremys barberi" = Chedighaii barberi Schmidt 1940 sideneck turtle CSU-SSK-81-7-1, neural bone; CSU-BRK-83-1-2, costals 1 and 2; CSU-K-85-7-4, right otic chamber and basisphenoid, identification confirmed in Gaffney et al. (2006)
Avetheropoda - Tyrannosauridae	Albertosaurus sp.³ Albertosaurus sp.³ Osborn 1905 Alberta lizard
Avetheropoda - Ornithomimidae	Ornithomimidae indet.³ Ornithomimidae indet.³ Marsh 1890 ornithomimid
Neornithischia - Hadrosauridae	Hadrosaurinae indet.³ Hadrosaurinae indet.³ Lambe 1918 hadrosaurine
Loricata -	"Crocodilia indet." = Crocodylia "Crocodilia indet." = Crocodylia Owen 1842 crocodilian
Crocodylia -	Deinosuchus rugosus¹, Thoracosaurus neocesariensis Deinosuchus rugosus¹ Emmons 1858 crocodilian Thoracosaurus neocesariensis De Kay 1842 crocodilian
Squamata - Mosasauridae	Mosasauridae indet., Prognathodon sp., Halisaurus sp., Platecarpus sp. Mosasauridae indet. Gervais 1852 mosasaur Prognathodon sp. Dollo 1889 mosasaur Halisaurus sp. Marsh 1869 mosasaur Platecarpus sp. Cope 1869 mosasaur
Stephanodus
- Trigonodontidae	Stephanodus sp. Stephanodus sp. Zittel 1883

¹Harrell and Schwimmer 2010; ²Schwimmer et al. 1994; ³Schwimmer et al. 1993; ⁴Suarez and Cappetta 2004