Leisure World (LACM 3172) (Miocene of the United States)

Also known as LACM 3172

Where: Orange County, California (33.6° N, 117.7° W: paleocoordinates 33.0° N, 113.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Monterey Formation, Serravallian (13.8 - 11.6 Ma)

• may be roughly equivalent to the later part of the Barstovian or early part of the Clarendonian land mammal ages, and therefore perhaps the Mohnian foraminiferal stage

Environment/lithology: marine; sandstone and phosphatic shale

• oragne sand and phophatic pebble conglomerate

Size class: macrofossils

Preservation: original phosphate

Reposited in the LACM

Collection methods: surface (in situ),

Primary reference: L. G. Barnes. 1978. A review of Lophocetus and Liolithax and their relationships to the delphinoid family Kentriodontidae (Cetacea: Odontoceti). Bulletin of the Natural History Museum of Los Angeles County 28:1-35 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 46069: authorized by Mark Uhen, entered by Mark Uhen on 29.12.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Odontaspidida - Isuridae
"Isurus planus" = Oxyrhina plana1
"Isurus planus" = Oxyrhina plana1 Agassiz 1856 mackerel shark
 Odontaspidida - Carcharodontidae
"Isurus hastalis" = Cosmopolitodus hastalis1
"Isurus hastalis" = Cosmopolitodus hastalis1 Agassiz 1843 elasmobranch
 Myliobatiformes - Myliobatidae
Myliobatis sp.1 Cuvier 1816 eagle ray
 Lamniformes - Otodontidae
"Carcharodon megalodon" = Otodus megalodon1
"Carcharodon megalodon" = Otodus megalodon1 Agassiz 1843 megalodon
Also studied in Pimiento and Balk
 Carchariniformes - Carcharhinidae
Carcharhinus sp.1 de Blainville 1816 requiem shark
Actinopteri
 Teleostei -
 Istiophoriformes - Istiophoridae
Makaira sp.1 Lacépède 1802
Reptilia
 Testudines - Dermochelyidae
Psephophorus indet.1 von Meyer 1847 leatherback
Aves
  -
Aves indet.1 Linnaeus 1758 bird
 Charadriiformes - Panalcidae
Praemancalla lagunensis1 Howard 1966 auk
 Ornithurae - Pelagornithidae
Osteodontornis orri1 Howard 1957 bird
 Procellariiformes - Procellariidae
Puffinus calhouni1 Howard 1968 shearwater
 Suliformes - Sulidae
cf. Morus lompocanus1 Miller 1925 gannet
Mammalia
 Sirenia - Dugongidae
Metaxytherium sp. de Christol 1840 dugong
 Perissodactyla - Desmostylidae
Desmostylus sp. Marsh 1888 desmostylian
 Perissodactyla - Paleoparadoxiidae
Paleoparadoxia sp.2 Reinhart 1959 desmostylian
 Carnivora - Odobenidae
Imagotaria sp. Mitchell 1968 walrus
 Carnivora - Otariidae
cf. Pithanotaria sp.1 Kellogg 1925 eared seal
 Carnivora - Desmatophocidae
Allodesmus sp. Kellogg 1922 pinniped
 Odontoceti -
Liolithax kernensis Kellogg 1931 toothed whale