Lawrence Canyon (Miocene of the United States)

Where: San Diego County, California (33.2° N, 117.4° W)

• coordinate based on political unit

When: upper gravel conglomerate unit Member (San Mateo Formation), Messinian (7.2 - 5.3 Ma)

• Messinian age added later by M. D. Uhen

Environment/lithology: marine; sandstone

Primary reference: D. P. Domning and T. A. Deméré. 1984. New material of Hydrodamalis cuestae (Mammalia: Dugongidae) from the Miocene and Pliocene of San Diego County, California. Transactions of the San Diego Society of Natural History 20(12):169-188 [J. Alroy/J. Alroy/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 19421: authorized by John Alroy, entered by John Alroy on 30.04.1994, edited by Mark Uhen and Catalina Pimiento

Creative Commons license: CC0 (CC0)

Taxonomic list

• member-level composite list; may include LACM 4301 (=UCMP V68106) and UCMP 6880
"Dinohippus (or possibly Pliohippus)" could be from this level)
Show authors, comments, and common names
Aves
 Charadriiformes - Alcoidae
Miomancalla howardi4
Miomancalla howardi4 Smith 2011 auk
locality SDSNH 3177
Mammalia
 Artiodactyla - Tayassuidae
Tayassuidae indet.
Tayassuidae indet. Palmer 1897 peccary
 Cetacea - Monodontidae
Delphinapterinae indet.1
Delphinapterinae indet.1 Gill 1871 toothed whale
closest relative is Denebola brachycephala
 Artiodactyla - Camelidae
cf. Hemiauchenia sp.
cf. Hemiauchenia sp. Gervais and Ameghino 1880 camel
 Carnivora - Mustelidae
Enhydritherium terraenovae2
Enhydritherium terraenovae2 Berta and Morgan 1985 otter
"Lawrence Canyon local fauna," Oceanside, San Mateo Co.
Chondrichthyes
 Lamniformes - Otodontidae
"Carcharocles megalodon" = Otodus megalodon3
"Carcharocles megalodon" = Otodus megalodon3 Agassiz 1835 megalodon
locality LACM 4297 SDNHM 3149
1Barnes and Deméré 1991; 2Berta and Morgan 1985; 3Pimiento and Balk 2015; 4Smith 2011