CSUN Loc. 1220b [Bateque Fm] (Eocene of Mexico)

Where: Baja California Sur, Mexico (26.8° N, 113.0° W: paleocoordinates 29.0° N, 96.4° 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 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 5496: authorized by Arnold Miller, entered by Karen Layou on 06.10.1999, edited by Susan Tremblay, Austin Hendy and Mark Uhen

Creative Commons license: CC BY (attribution)

Taxonomic list

 Nummulitacea - Asterocyclinidae
 Nummulitacea - Discocyclinidae
Actinocyclina aff. aster
Actinocyclina sp. aff. A. aster
 Decapoda - Raninidae
Lophoranina bishopi n. sp., "Ranina berglundi n. sp." = Alcespina berglundi
Lophoranina bishopi n. sp. Squires and Demetrion 1992 crab
"Ranina berglundi n. sp." = Alcespina berglundi Squires and Demetrion 1992 crab
 Arcida - Arcidae
"Barbatia (Acar) sp." = Acar1, Barbatia (Barbatia) sp.
"Barbatia (Acar) sp." = Acar1 Gray 1857 miniature ark
Barbatia (Barbatia) sp. Gray 1842 clam
both are found: Barbatia (Acar?)sp., Barbatia (Barbatia?) sp.
 Arcida - Glycymerididae
Glycymeris sagittata Gabb 1864 clam
 Pectinida - Pectinoidae
Spondylus batequensis Squires and Demetrion 1990 scallop
 Pectinida - Limidae
Lima kennedyi n. sp. Squires and Demetrion 1992 file clam
 Pectinida - Plicatulidae
Plicatula surensis n. sp.4 Squires and Saul 1997 scallop
Plicatula surensis4 Squires and Saul 1997 scallop
Plicatula sp. aff. P. filamentosa
 Pectinida - Anomiidae
Anomia ? sp. Linnaeus 1758 jingle
 Ostreida - Gryphaeidae
"Pycnodonte pacifica" = Phygraea pacifica, Pycnodonte bajaensis
"Pycnodonte pacifica" = Phygraea pacifica Squires and Demetrion 1990 oyster
Pycnodonte bajaensis Squires and Demetrion 1990 oyster
 Ostreida - Malleidae
 Carditida - Crassatellidae
Crassatella sp. Lamarck 1799 clam
 Carditida - Carditidae
"Glyptoactis domenginica" = Glyptoactis (Claibornicardia) domenginica
"Glyptoactis domenginica" = Glyptoactis (Claibornicardia) domenginica Vokes 1939 clam
 Cardiida - Cardiidae
"Acanthocardia aff. sorrentoensis" = Agnocardia sorrentoensis
"Acanthocardia aff. sorrentoensis" = Agnocardia sorrentoensis Hanna 1927 cockle
Acanthocardia sp. aff. A. sorrentoensis
 Lucinida - Lucinidae
Fimbria pacifica n. sp.2 Squires 1990 clam
 Ptenoglossa - Epitoniidae
Epitonium sp. Bolten 1798 wentletrap
Acrilla sp. n. sp. Adams and Adams 1860 wentletrap
? uncertain new species?
 Patellogastropoda - Nacellidae
Cellana sp. Adams 1869 limpet
 Gymnosomata - Clionidae
Clionidae indet. Rafinesque 1815 sea angel
 Opisthobranchia - Retusidae
Cylichnina tantilla Anderson and Hanna 1925 snail
 Architaenioglossa - Ampullinidae
Eocernina hannibali Dickerson 1914 snail
 Neogastropoda - Olividae
? Olivella mathewsonii Gabb 1864 olive snail
 Neogastropoda - Volutidae
Lyrischapa lajollaensis Hanna 1927 volute
 Stromboidea - Strombidae
Platyoptera pacifica, "Ectinochilus sp." = Rimella, "Rimella supraplicata" = Ectinochilus (Cowlitzia) canalifer supraplicata3
Platyoptera pacifica Squires and Demetrion 1990 true conch
"Ectinochilus sp." = Rimella Agasiz 1841 true conch
Ectinochilus sp., cf. E. macilentus
"Rimella supraplicata" = Ectinochilus (Cowlitzia) canalifer supraplicata3 Gabb 1864 true conch
 Stromboidea - Seraphsidae
Paraseraphs erraticus Cooper 1894 snail
 Naticoidea - Naticidae
Amauropsis sp. Mörch 1857 moon snail
Gyrodes ? sp. Conrad 1860 moon snail
 Cypraeoidea - Pediculariidae
Cypraedia cf. girauxi Cossmann and Pissarro 1911 snail
 Cypraeoidea - Eocypraeidae
Eocypraea ? sp. Cossmann 1903 snail
 Cypraeoidea - Cypraeidae
Bernaya grovesi n. sp. Squires and Demetrion 1992 cowry
 Xenophoroidea - Xenophoridae
Xenophora stocki Dickerson 1916 carrier shell
 Tonnoidea - Ranellidae
"Olequahia domenginica" = Ranella domenginica
"Olequahia domenginica" = Ranella domenginica Vokes 1939 triton shell
 Sorbeoconcha - Turritellidae
Turritella uvasana Conrad 1855 turret shell
Turritella buwaldana Dickerson 1916 turret shell
? listed next to locality info
 Neritoidea - Neritidae
Velates batequensis Squires and Demetrion 1990 snail
Velates perversus Gmelin 1791 snail
 Architectonicoidea - Architectonicidae
"Architectonica cognata" = Architectonica (Stellaxis) cognata
"Architectonica cognata" = Architectonica (Stellaxis) cognata Gabb 1864 sundial
 Nautilida - Hercoglossidae
Hercoglossa ? sp. Conrad 1866 nautiloid
 Nautilida - Aturiidae
Aturia myrlae Hanna 1927 nautiloid
 Cyclostomata - Stomatoporidae
Stomatopora sp. Bronn 1825
 Cidaroida -
Cidaroida indet. Claus 1880 pencil urchin
spine A
 Spatangoida - Schizasteridae
Schizaster sp. Agassiz 1835 heart urchin
Schizaster sp. aff. S. lecontei
 Scleractinia - Actinacididae
Actinacis ? sp. d'Orbigny 1849 stony coral
 Scleractinia - Astrocoeniidae
Astrocoenia dilloni Durham 1942 stony coral
 Scleractinia - Pocilloporidae
Stylophora chaneyi Durham 1942 stony coral
 Scleractinia - Caryophylliidae
Stephanocyathus ? sp. Seguenza 1864 stony coral
 Scleractinia - Flabellidae
Placotrochus ? sp. Milne-Edwards and Haime 1848 stony coral
 Scleractinia - Turbinoliidae
Turbinolia dickersoni Nomland 1916 stony coral
 Gorgonacea - Parisididae
Parisis batequensis n. sp. Squires and Demetrion 1992 gorgonian
 Corallinales -
Archaeolithothamnium sp. Rothpletz 1891