Los Altares (Cretaceous of Mexico)

Where: Chihuahua, Mexico (24.4° N, 105.9° W: paleocoordinates 31.4° N, 80.2° W)

• coordinate based on nearby landmark

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

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

• "marine"

Size class: mesofossils

Collection methods: bulk, sieve,

• "bulk-sampled"

Primary reference: D. Cope, B. England, R. B. Brown, J. Westgate, and J. Pittman. 2003. A Late Cretaceous (Campanian) marine vertebrate microfauna from the Aguja Formation of Chihuahua, Mexico. Journal of Vertebrate Paleontology 23(3):42A [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 35353: authorized by John Alroy, entered by John Alroy on 04.12.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Sclerorhynchiformes - Sclerorhynchidae
Ischyrhiza sp. Leidy 1856 cartilaginous fish
 Sclerorhynchiformes - Ptychotrygonidae
Ptychotrygon sp. Jaekel 1894 cartilaginous fish
 Odontaspidida - Scapanorhynchidae
Scapanorhynchus sp. Woodward 1889 elasmobranch
 Hybodontiformes - Hybodontidae
Hybodus sp. Agassiz 1837 elasmobranch
 Rajiformes - Rhinobatidae
Rhinobatos sp. Link 1790 guitarfish
 Rajiformes -
Protoplatyrhina sp. Case 1978 guitarfish
 Lamniformes - Anacoracidae
Squalicorax sp. Whitley 1939 crow shark
 Lamniformes - Cretoxyrhinidae
Cretolamna sp. Glikman 1958 mackerel shark
 Lamniformes - Odontaspididae
Odontaspis sp. Agassiz 1843 sand tiger shark
Carcharias sp. Rafinesque 1810 sand shark
 Orectolobiformes -
Cretorectolobus sp. Case 1978 carpet shark
 Orectolobiformes - Ginglymostomatidae
Ginglymostoma sp. Müller and Henle 1838 nurse shark
 Orectolobiformes - Orectolobidae
Squatirhina sp. Casier 1947 wobbegong
 Orectolobiformes - Hemiscylliidae
Chiloscyllium sp. Müller and Henle 1837 carpet shark
Actinopteri
 Elopiformes - Phyllodontidae
Phyllodontidae indet. Sauvage 1875
 Salmoniformes - Enchodontidae
Enchodus sp. Agassiz 1843
 Tetraodontiformes - Trigonodontoidae
"Stephanodus" sp. Zittel 1883
 Amiiformes - Amiidae
Amiidae indet. Huxley 1861 bowfin