Saint George's Bridge East (Cretaceous to of the United States)

Where: New Castle County, Delaware (39.6° N, 75.7° W: paleocoordinates 39.0° N, 45.6° W)

• coordinate estimated from map

When: Marshalltown Formation (Matawan Group), Middle Campanian to Middle Campanian (83.5 - 70.6 Ma)

• formation-level stratigraphic resolution

Environment/lithology: terrestrial; fine-grained, glauconitic, gray, green, silty, sandy sandstone

• Da rk gr e eni sh gr ay, highly gl auconi t i c , ve ry f ine s i l ty

•s and. I t ha s yi e lded mos a s aur , tur t l e , and hadros aur

•ma t e r i a l . I t cont a ins the mos t dive r s e f auna of sha rk

•ma t e r i a l . The r e a r e a l so abundant l a rge pe l e cypods .

•The forma t ion wa s depos i t ed in a sha l low, open ma r ine ,

•pos s ibly embayed a r e a .

Size class: macrofossils

Primary reference: E. M. Lauginiger and E. F. Hartstein. 1983. A guide to fossil sharks, skates, and rays from the Chesapeake and Delaware Canal area, Delaware. Open File Report - Delaware Geological Survey 21:1-63 [M. Uhen/M. Shalap/M. Shalap]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 126810: authorized by Mark Uhen, entered by Margaret Shalap on 18.04.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Myliobatiformes - Myliobatidae
Brachyrhizodus wichitaensis Romer 1942 eagle ray
 Myliobatiformes - Rhombodontidae
Rhombodus levis Cappetta and Case 1975 stingray
 Hybodontiformes - Hybodontidae
Hybodus sp. Agassiz 1834 elasmobranch
 Hybodontiformes - Lonchidiidae
Lonchidion babulskii Cappetta and Case 1975 elasmobranch
 Squatiniformes - Squatinidae
Squatina hassei Leriche 1929 angel shark
 Rajiformes -
Pseudohypolophus sp. Cappetta and Case 1975 guitarfish
 Rajiformes - Rhinobatidae
Rhinobatos casieri Herman 1977 guitarfish
 Rajiformes - Ptychotrygonidae
Ptychotrygon vermiculata Cappetta 1975 ray
 Rajiformes - Sclerorhynchidae
Ischyrhiza mira Leidy 1856 ray
 Orectolobiformes - Ginglymostomatidae
"Ginglymostoma globidens" = Plicatoscyllium globidens
"Ginglymostoma globidens" = Plicatoscyllium globidens Cappetta and Case 1975 nurse shark
 Lamniformes - Odontaspididae
"Hypotodus aculeatus" = Odontaspis aculeatus
"Hypotodus aculeatus" = Odontaspis aculeatus Cappetta and Case 1975 sand tiger shark
 Lamniformes - Carchariidae
"Odontaspis samhammeri" = Carcharias samhammeri, "Odontaspis holmdelensis" = Carcharias holmdelensis
"Odontaspis samhammeri" = Carcharias samhammeri Cappetta and Case 1975 sand shark
"Odontaspis holmdelensis" = Carcharias holmdelensis Cappetta and Case 1975 sand shark
 Lamniformes - Anacoracidae
Squalicorax pristodontus Agassiz 1835 crow shark
Squalicorax kaupi Agassiz 1843 crow shark
 Lamniformes - Pseudocoracidae
Pseudocorax granti Cappetta and Case 1975 mackerel shark
 Lamniformes - Mitsukurinidae
Scapanorhynchus texanus Roemer 1852 goblin shark
 Lamniformes - Archaeolamnidae
"Plicatolamna arcuata" = Archaeolamna kopingensis
"Plicatolamna arcuata" = Archaeolamna kopingensis Davis 1890 mackerel shark
 Lamniformes - Alopiidae
 Lamniformes - Otodontidae
"Cretolamna appendiculata" = Cretalamna appendiculata
"Cretolamna appendiculata" = Cretalamna appendiculata Agassiz 1835 mackerel shark
Cretolamna appendiculata lata