Corkscrew Hill (Miocene to of Mexico)

Also known as B.C.S. 2 or Loma del Tirabuzón

Where: Baja, Mexico (27.4° N, 112.3° W: paleocoordinates 27.1° N, 110.7° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Tirabuzon Formation, Messinian to Messinian (7.2 - 3.6 Ma)

• From the text: Reported as Gloria Formation. Based on sharks, middle Pliocene in age

• group of beds-level stratigraphic resolution

Environment/lithology: marine; unlithified, silty siltstone and unlithified siltstone

Size class: macrofossils

Primary reference: S. P. Applegate. 1978. Phyletic studies; part 1, Tiger sharks. Revista Mexicana de Ciencias Geológicas 2(1):55-64 [M. Uhen/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 154117: authorized by Mark Uhen, entered by Mark Uhen on 27.01.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Squaliformes - Squalidae
Squalus sp. Linnaeus 1758 dogfish shark
 Heterodontiformes - Heterodontidae
Heterodontus sp. de Blainville 1816 bullhead shark
 Hexanchiformes - Hexanchidae
Notorhynchus sp. Ayres 1855 sevengill shark
Hexanchus griseus sixgill shark
 Carcharhiniformes - Galeocerdidae
 Carcharhiniformes - Carcharhinidae
Rhizoprionodon longurio Jordan and Gilbert 1882 sharpnose shark
Carcharhinus velox requiem shark
Carcharhinus limbatus requiem shark
Carcharhinus altimus requiem shark
Carcharhinus leucas Valenciennes 1839 requiem shark
Carcharhinus falciformis Bibron 1841 requiem shark
Carcharhinus albimarginatus Rüppell 1837 requiem shark
Carcharhinus obscurus Le Sueur 1818 requiem shark
Prionace glauca blue shark
 Carcharhiniformes - Sphyrnidae
Sphyrna mokarran hammerhead shark
Sphyrna media Springer 1940 hammerhead shark
Sphyrna lewini Griffith and Smith 1834 hammerhead shark
Sphyrna zygaena Linnaeus 1758 hammerhead shark
 Carcharhiniformes - Hemigaleidae
Hemipristis serra Agassiz 1835 ground shark
 Lamniformes - Otodontidae
"Carcharodon megalodon" = Otodus megalodon, "Isurus benedeni" = Parotodus benedeni
"Carcharodon megalodon" = Otodus megalodon Agassiz 1835 megalodon
See Pimiento and Balk
"Isurus benedeni" = Parotodus benedeni Le Hon 1871 mackerel shark
 Lamniformes - Lamnidae
Isurus oxyrinchus, "Carcharodon carcharias" = Carcharodon carcharias, "Carcharodon sulcidens" = Carcharodon carcharias
Isurus oxyrinchus Rafinesque 1810 mackerel shark
"Carcharodon carcharias" = Carcharodon carcharias Linnaeus 1758 great white shark
"Carcharodon sulcidens" = Carcharodon carcharias Linnaeus 1758 great white shark
 Lamniformes - Carchariidae
"Odontaspis acutissima" = Carcharias acutissimus
"Odontaspis acutissima" = Carcharias acutissimus Agassiz 1843 sand shark
 Lamniformes - Cetorhinidae
Cetorhinus sp. de Blainville 1816 basking shark