CSUN Loc. 1470 [Bateque Fm] (Eocene of Mexico)

Where: Baja California, Mexico (26.5° N, 112.7° W: paleocoordinates 28.7° N, 96.2° W)

• outcrop-level geographic resolution

When: Bateque Formation, Ypresian (56.0 - 47.8 Ma)

• This collection is from section 2 of the author's four section division of the formation.

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; poorly lithified, bioturbated, shelly/skeletal, yellow sandstone and lithified limestone

• 90 m thick shallow-marine deposits that...consist of bioturbated and parallel-laminated, yellow, very fine-grained sandstone (75%) with many interbedded lenses (25%) filled with abundant macrofossils. lenses are described as poorly sorted coquinas.

Size class: macrofossils

Reposited in the LACM

Primary reference: R. L. Squires and R. A. Demetrion. 1992. Paleontology of the Eocene Bateque Formation, Baja California Sur, Mexico. Contributions in Science (Natural History Museum of Los Angeles County) 434:1-55 [A. Miller/K. Layou]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 5506: authorized by Arnold Miller, entered by Karen Layou on 08.10.1999, edited by Amanda Doyle and Mark Uhen

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Foraminifera
 Nummulitacea - Asterocyclinidae
Pseudophragmina clarki
Pseudophragmina clarki Cushman 1920
? in locality data
Chlorophyceae
 Dasycladales - Dasycladaceae
Dasycladaceae indet.
Dasycladaceae indet. Kutzing 1843
Sedentaria
 Sabellida - Serpulidae
Serpula batequensis n. sp.
Serpula batequensis n. sp. Squires and Demetrion 1992
Gastropoda
 Sorbeoconcha - Naticidae
Gyrodes ? sp.
Gyrodes ? sp. Conrad 1860 moon snail
 Neogastropoda - Fasciolariidae
Clavilithes tabulatus
Clavilithes tabulatus Dickerson 1913 snail
 Neogastropoda - Volutidae
Lyrischapa lajollaensis
Lyrischapa lajollaensis Hanna 1927 volute
 Neogastropoda - Olividae
? Olivella mathewsonii
? Olivella mathewsonii Gabb 1864 olive snail
 Sorbeoconcha - Strombidae
Rimella supraplicata1, "Ectinochilus sp." = Rimella, Platyoptera pacifica
Rimella supraplicata1 Gabb 1864 true conch
"Ectinochilus sp." = Rimella Agassiz 1840 true conch
Ectinochilus sp. cf. E. macilentus
Platyoptera pacifica Squires and Demetrion 1990 true conch
? in locality data
 Sorbeoconcha - Seraphsidae
Paraseraphs erraticus
Paraseraphs erraticus Cooper 1894 snail
 Sorbeoconcha - Cassidae
Galeodea sp.
Galeodea sp. Link 1807 snail
 Sorbeoconcha - Cymatiidae
"Olequahia domenginica" = Ranella domenginica
"Olequahia domenginica" = Ranella domenginica Vokes 1939 snail
 Cerithioidea - Turritellidae
Turritella uvasana
Turritella uvasana Conrad 1855 turret shell
s.s.
 Neritoidea - Neritidae
Velates perversus
Velates perversus Gmelin 1791 snail
 Opisthobranchia - Retusidae
Cylichnina tantilla
Cylichnina tantilla Anderson and Hanna 1925 snail
 Opisthobranchia - Cylichnidae
Scaphander ? sp.
Scaphander ? sp. Monfort 1810 snail
Bivalvia
 Ostreida - Gryphaeidae
Pycnodonte bajaensis, "Pycnodonte pacifica" = Phygraea pacifica
Pycnodonte bajaensis Squires and Demetrion 1990 oyster
"Pycnodonte pacifica" = Phygraea pacifica Squires and Demetrion 1990 oyster
 Ostreida - Pinnidae
Pinna llajasensis
Pinna llajasensis Squires 1983 oyster
collected as float
 Cardiida - Veneridae
Pitar joaquinensis
Pitar joaquinensis Vokes 1939 venus clam
 Solenida - Solenidae
"Solena novacularis" = Solena (Eosolen) novacularis
"Solena novacularis" = Solena (Eosolen) novacularis Anderson and Hanna 1925 clam
Echinoidea
 Clypeasteroida - Oligopygidae
Haimea bajasurensis n. sp.2
Haimea bajasurensis n. sp.2 Squires and Demetrion 1994 sand dollar
 Echinolampadoida - Echinolampadidae
Echinolampas ? sp.
Echinolampas ? sp. Gray 1825 sea urchin
both Echinolampas sp. a and Echinolampas sp. b
 Spatangoida - Schizasteridae
Schizaster sp.
Schizaster sp. Agassiz 1835 heart urchin
schizaster sp. aff. S. lecontei
 Spatangoida - Brissidae
Eupatagus batequensis n. sp.
Eupatagus batequensis n. sp. Squires and Demetrion 1992 heart urchin
1Squires 2013; 2Squires and Demetrion 1994