El Jahuay (Miocene of Peru)

Also known as ELJ, Alto Grande

Where: Peru (15.4° S, 74.9° W: paleocoordinates 15.8° S, 72.8° W)

• coordinate estimated from map

When: Pisco Formation, Tortonian (11.6 - 7.2 Ma)

• 9.95-7.5 Ma (Muizon and Bellon 1986: 39394); 9-9.5 Ma (Stucchi & Urbina, 2004); older than 8.8 (Ehret et al 2012)

• bed-level stratigraphic resolution

Environment/lithology: shoreface; diatomaceous siltstone

• EJL horizon. There is a high sedimentation rate, with shallow-to-deep shelf, and upwelling.

Size class: macrofossils

Preservation: original phosphate

Reposited in the MNHN

Primary reference: C. Muizon. 1988. Les vertebres fossiles de la Formation Pisco (Perou). Troisieme partie: Les Odontocetes (Cetacea, Mammalia) du Miocene. Editions Recherche sur les Civilisations (78)1-244 [M. Uhen/N. Pyenson/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 45486: authorized by Mark Uhen, entered by Nick Pyenson on 25.10.2004, edited by Mark Uhen

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Odontaspidida - Carcharodontidae
"Isurus hastalis" = Cosmopolitodus hastalis3
"Isurus hastalis" = Cosmopolitodus hastalis3 Agassiz 1843 elasmobranch
 Plagiostomi - Squalidae
"Procarcharodon megalodon" = Otodus megalodon4
"Procarcharodon megalodon" = Otodus megalodon4 Agassiz 1843 megalodon
 Myliobatiformes - Myliobatidae
Myliobatis sp.4 Cuvier 1816 eagle ray
 Lamniformes - Lamnidae
"Isurus cf. oxyrhynchus" = Isurus oxyrinchus4
"Isurus cf. oxyrhynchus" = Isurus oxyrinchus4 Rafinesque 1810 mako shark
 Carchariniformes - Carcharhinidae
Carcharhinus cf. egertoni4 Agassiz 1843 requiem shark
 Heterodontiformes - Heterodontidae
Heterodontus sp.4 de Blainville 1816 bullhead shark
 Pristiophoriformes - Pristiophoridae
Pristiophorus sp.4 Bleeker 1859 saw shark
Actinopteri
 Teleostei -
"Tetradontiformes indet." = Tetraodontiformes4
"Tetradontiformes indet." = Tetraodontiformes4 Berg 1940
 Clupeiformes - Clupeoidei
 Siluriformes - Ariidae
Ariidae indet.4 Berg 1958 Ariid catfish
Aves
 Ornithurae - Pelagornithidae
Pelagornithidae indet.4 F├╝rbringer 1888 bird
[entered as Pleagornithidae indet.]
Pelagornis sp.1 Lartet 1857 bird
 Sphenisciformes - Spheniscidae
Spheniscidae indet.1 Bonaparte 1831 penguin
 Suliformes - Phalacrocoracidae
cf. Phalacrocorax sp.4 Brisson 1760 cormorant
 Suliformes - Sulidae
cf. Sula sp.4 Brisson 1760 booby
Sula sp.5 Brisson 1760 booby
Reptilia
 Loricata -
Eusuchia indet.4 Huxley 1875 crocodilian
Mammalia
 Carnivora - Phocidae
Monachinae indet.4 Trouessart 1897 seal
form 2, form 3
 Xenarthra - Megatheriidae
Megatheriidae indet.3 Gray 1821 edentate
 Cetacea -
Mysticeti indet.4 Cope 1891 whale
[entered as Mysticet indet.]
 Cetacea - Cetotheriidae
Cetotheriidae indet.3 Brandt 1872 whale
 Cetacea - Phocoenidae
Phocoenidae indet.3 Gray 1825 porpoise
Australithax intermedia n. gen. n. sp. Muizon 1988 porpoise
 Cetacea - Pontoporiidae
Brachydelphis jahuayensis n. sp.2 Lambert and Muizon 2013 toothed whale
Brachydelphis mazeasi n. gen. n. sp. Muizon 1988 toothed whale