Rancho Algodones ( of Mexico)

Also known as IGM 92; BCS-46

Where: Baja California Sur, Mexico (23.2° N, 109.6° W: paleocoordinates 23.0° N, 108.6° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Refugio Formation, Blancan (4.9 - 1.8 Ma)

• Formerly Salada Formation.

• group of beds-level stratigraphic resolution

Environment/lithology: marginal marine; calcareous sandstone

• Shallow marine deposits, with a probable depth of 30 meters
• Arenisca arcosica de grano medio a grueso, cementada por carbonato de calcio, de color amarillo claro y de estratificación mediana a gruesa; conglomerado de grano fino, limolita y lutita de estratificación lenti cular o convulsiva

Size class: macrofossils

Primary reference: L. Espinosa-Arrubarrena and S. P. Applegate. 1981. Selacifauna Pliocenica de Baja California Sur, Mexico y sus problemas de correlacion regional. Anais do Congresso Latino-Americano Paleontologia 2(2):667-681 [M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 154118: authorized by Mark Uhen, entered by Mark Uhen on 27.01.2014, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• Rancho Algodones Local Fauna
Show authors, comments, and common names
Mammalia
 Carnivora - Canidae
"Cerdocyon avius n. sp." = Ferrucyon avius
"Cerdocyon avius n. sp." = Ferrucyon avius Torres and Ferrusquia 1981 canine
IGM 2903 - type; 'named' as Cerdocyon ? avius
 Lagomorpha - Leporidae
Notolagus sp.
Notolagus sp. Wilson 1937 rabbit
IGM 2904
 Placentalia -
Rodentia indet.
Rodentia indet. Bowdich 1821 rodent
IGM 2921; "indeterminate myomorph rodent"
Chondrichthyes
 Carcharhiniformes - Galeocerdidae
Galeocerdo rosaliensis
Galeocerdo rosaliensis Applegate 1978 tiger shark
 Carcharhiniformes - Carcharhinidae
Carcharhinus altimus, Carcharhinus velox, Carcharhinus obscurus, Carcharhinus brachyurus, Carcharhinus leucas, Carcharhinus albimarginatus
Carcharhinus altimus requiem shark
Carcharhinus velox requiem shark
Carcharhinus obscurus Le Sueur 1818 requiem shark
Carcharhinus brachyurus Gunther 1870 requiem shark
Carcharhinus leucas Valenciennes 1839 requiem shark
Carcharhinus albimarginatus Rüppell 1837 requiem shark
 Orectolobiformes - Ginglymostomatidae
Ginglymostoma sp.
Ginglymostoma sp. Müller and Henle 1838 nurse shark
 Lamniformes - Otodontidae
"Carcharodon megalodon" = Otodus megalodon
"Carcharodon megalodon" = Otodus megalodon Agassiz 1835 megalodon
 Lamniformes - Lamnidae
"Carcharodon carcharias" = Carcharodon carcharias, "Carcharodon sulcidens" = Carcharodon carcharias, Isurus oxyrinchus
"Carcharodon carcharias" = Carcharodon carcharias Linnaeus 1758 great white shark
"Carcharodon sulcidens" = Carcharodon carcharias Linnaeus 1758 great white shark
Isurus oxyrinchus Rafinesque 1810 mackerel shark
 Squaliformes - Dalatiidae
Dalatiidae indet.
Dalatiidae indet. Gray 1851 shark