Arroyo de la Purisimia (Miocene of Mexico)

Also known as UCMP V5733

Where: Baja California, Mexico (26.3° N, 112.0° W: paleocoordinates 25.8° N, 107.5° W)

• coordinate stated in text

When: Ysidro Formation, Middle Miocene (16.0 - 11.6 Ma)

• early middle Miocene, San Raymundo Formation of Mina (1957)

• member-level stratigraphic resolution

Environment/lithology: marine; lithified, brown, blue, calcareous sandstone

• hard, limy bluish-brown sandstones with abundant marine inverts and bone

Size class: macrofossils

Preservation: original phosphate

Primary reference: D. P. Domning. 1978. Sirenian evolution in the North Pacific Ocean. University of California Publications in Geological Sciences 118:1-176 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 52181: authorized by Mark Uhen, entered by Mark Uhen on 29.07.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Maxillopoda
 Sessilia - Balanidae
Bivalvia
 Arcida - Glycymerididae
Glycymeris sp. Da Costa 1778 clam
 Pectinida - Pectinoidae
Spondylus perrini Wiedey 1928 scallop
"Amusium lompocensis" = Amussium lompocensis Arnold 1906 scallop
Lyropecten miguelensis Arnold 1906 scallop
 Pectinida - Anomiidae
Anomia vaquerosensis Loel and Corey 1932 jingle
 Ostreida - Gryphaeidae
"Ostrea loeli" = Pycnodonte (Pycnodonte) loeli Hertlein 1927 oyster
 Cardiida - Ungulinidae
Diplodonta sp. Bronn 1831 clam
 Cardiida - Veneridae
"Chione richthofeni" = Chione (Chionopsis) richthofeni
"Chione richthofeni" = Chione (Chionopsis) richthofeni Hertlein and Jordan 1927 venus clam
Gastropoda
 Ptenoglossa - Epitoniidae
Epitonium (Asperiscala) sp. de Boury 1909 wentletrap
 Neogastropoda - Olividae
Oliva sp. Bruguière 1789 olive snail
 Neogastropoda - Muricidae
Rapana vaquerosensis Arnold 1908 murex snail
 Sorbeoconcha - Turritellidae
Turritella inezana turret shell
subspecies bicarina
Turritella ocoyana Conrad 1855 turret shell
subspecies wittichi
Turritella temblorensis Wiedey 1928 turret shell
Chondrichthyes
 Lamniformes - Lamnidae
Carcharodon sp. Smith 1838 white shark
Mammalia
 Sirenia - Dugongidae
Dioplotherium allisoni Kilmer 1965 dugong