CSUN Loc. 1220b, Mesa la Salina: Ypresian, Mexico

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Echinoidea - Cidaroida
Cidaroida indet. (Claus 1880)
spine A
Echinoidea - Spatangoida - Schizasteridae
Schizaster sp. Agassiz 1835
Schizaster sp. aff. S. lecontei
Echinoidea - Cassiduloida - Neolampadidae
Calilampas californiensis Squires and Demetrion 1995
Squires and Demetrion 1995 2 specimens
Stenolaemata - Cyclostomata - Stomatoporidae
Stomatopora sp. Bronn 1825
Cephalopoda - Nautilida - Hercoglossidae
Hercoglossa ? sp. Conrad 1866
Cephalopoda - Nautilida - Aturiidae
Aturia myrlae (Hanna 1927)
Gastropoda - Turritellidae
Turritella uvasana Conrad 1855
Turritella buwaldana Dickerson 1916
? listed next to locality info
Gastropoda - Naticidae
Amauropsis sp. Mörch 1857
Gyrodes ? sp. Conrad 1860
Gastropoda - Pediculariidae
Cypraedia sp. Swainson 1840
Groves and Squires 2023
Cypraedia cf. girauxi (Cossmann and Pissarro 1911)
Gastropoda - Eocypraeidae
Eocypraea ? sp. Cossmann 1903
    = Eocypraea (Eocypraea) batequensis n. sp. Groves 2011
Groves 2011
recombined as Eocypraea batequensis
Gastropoda - Cypraeidae
Bernaya (Protocypraea) grovesi n. sp. Squires and Demetrion 1992
recombined as Bernaya grovesi
Gastropoda - Strombidae
Platyoptera pacifica Squires and Demetrion 1990
Rimella supraplicata (Gabb 1864)
Squires 2013
Ectinochilus sp. Cossmann 1889
synonym of Rimella
Ectinochilus sp., cf. E. macilentus
Gastropoda - Seraphsidae
Paraseraphs erraticus (Cooper 1894)
Gastropoda - Cymatiidae
Olequahia domenginica (Vokes 1939)
original and current combination Ranella domenginica
Gastropoda - Cassidae
Galeodea sp. Link 1807
Gastropoda - Neogastropoda - Volutidae
Lyrischapa lajollaensis (Hanna 1927)
Gastropoda - Neogastropoda - Olividae
? Olivella mathewsonii Gabb 1864
Gastropoda - Xenophoridae
Xenophora stocki Dickerson 1916
Gastropoda - Epitoniidae
Epitonium sp. Bolten 1798
Acrilla sp. n. sp. Adams and Adams 1860
? uncertain new species?
Gastropoda - Ampullinidae
Eocernina hannibali (Dickerson 1914)
Gastropoda - Patellida - Nacellidae
Cellana sp. Adams 1869
Gastropoda - Opisthobranchia - Retusidae
Cylichnina tantilla (Anderson and Hanna 1925)
Gastropoda - Heterostropha - Architectonicidae
Architectonica cognata Gabb 1864
recombined as Architectonica (Stellaxis) cognata
Gastropoda - Heterostropha - Clionidae
Clionidae indet. Rafinesque 1815
Gastropoda - Neritidae
Velates batequensis Squires and Demetrion 1990
Velates perversus (Gmelin 1791)
Bivalvia - Carditida - Crassatellidae
Crassatella sp. Lamarck 1799
Bivalvia - Carditida - Carditidae
Glyptoactis domenginica (Vokes 1939)
recombined as Glyptoactis (Claibornicardia) domenginica
Bivalvia - Cardiida - Cardiidae
Acanthocardia aff. sorrentoensis (Hanna 1927)
recombined as Agnocardia sorrentoensis
Acanthocardia sp. aff. A. sorrentoensis
Bivalvia - Lucinida - Lucinidae
Fimbria pacifica n. sp. Squires 1990
Squires 1990
Bivalvia - Ostreida - Gryphaeidae
Pycnodonte bajaensis Squires and Demetrion 1990
Pycnodonte pacifica Squires and Demetrion 1990
recombined as Phygraea pacifica
Bivalvia - Ostreida - Malleidae
Nayadina (Exputens) batequensis n. sp. Squires 1990
Squires 1990
Bivalvia - Pectinida - Anomiidae
Anomia ? sp. Linnaeus 1758
Bivalvia - Pectinida - Plicatulidae
Plicatula aff. filamentosa (Conrad 1833)
Plicatula sp. aff. P. filamentosa
    = Plicatula surensis Squires and Saul 1997
Squires and Saul 1997
Plicatula surensis n. sp. Squires and Saul 1997
Squires and Saul 1997
Bivalvia - Pectinida - Limidae
Lima kennedyi n. sp. Squires and Demetrion 1992
Bivalvia - Pectinida - Spondylidae
Spondylus batequensis Squires and Demetrion 1990
Bivalvia - Arcida - Arcidae
Barbatia (Barbatia) sp. Gray 1842
both are found: Barbatia (Acar?)sp., Barbatia (Barbatia?) sp.
Bivalvia - Arcida - Glycymerididae
Glycymeris sagittata (Gabb 1864)
recombined as Glycymerita sagittata
Malacostraca - Decapoda - Raninidae
Lophoranina bishopi n. sp. Squires and Demetrion 1992
Ranina berglundi n. sp. Squires and Demetrion 1992
Anthozoa - Scleractinia - Pocilloporidae
Stylophora chaneyi Durham 1942
Anthozoa - Scleractinia - Astrocoeniidae
Astrocoenia dilloni Durham 1942
Anthozoa - Scleractinia - Caryophylliidae
Stephanocyathus ? sp. Seguenza 1864
Anthozoa - Scleractinia - Turbinoliidae
Turbinolia dickersoni Nomland 1916
Anthozoa - Scleractinia - Flabellidae
Placotrochus ? sp. Milne-Edwards and Haime 1848
Anthozoa - Scleractinia - Merulinidae
Antillia batequensis Squires and Demetrion 1992
Anthozoa - Scleractinia - Actinacididae
Actinacis ? sp. d'Orbigny 1849
Anthozoa - Gorgonacea - Parisididae
Parisis batequensis n. sp. Squires and Demetrion 1992
Florideophyceae - Corallinales
Archaeolithothamnium sp. Rothpletz 1891
Chlorophyceae - Dasycladales - Dasycladaceae
Dasycladaceae indet. Kutzing 1843
Discocyclinidae
Actinocyclina aff. aster
Actinocyclina sp. aff. A. aster
Asterocyclinidae
Pseudophragmina clarki (Cushman 1920)
see common names

Geography
Country:Mexico State/province:Baja California Sur
Coordinates: 26.8° North, 113.0° West (view map)
Paleocoordinates:29.0° North, 96.4° West
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Eocene
Stage:Ypresian 10 m.y. bin:Cenozoic 2
*Period:Tertiary *Local age/stage:Capay
Key time interval:Ypresian
Age range of interval:56.00000 - 47.80000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Bateque
Stratigraphic resolution:group of beds
Stratigraphy comments: this collection is from section 2 of the author's four section division of the formation
Lithology and environment
Primary lithology:planar lamination,bioturbation,shelly/skeletal,yellow poorly lithified sandstone
Secondary lithology: lithified "limestone"
Includes fossils?Y
Includes fossils?Y
Lithology description: 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
Environment:transition zone/lower shoreface
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Museum repositories:LACM
Metadata
Also known as:LACMIP loc. 16951; LACMIP loc. 41220b
Database number:5496
Authorizer:A. Miller, A. Hendy, M. Uhen, P. Holroyd, J. Marcot Enterer:K. Layou, A. Hendy, M. Uhen, J. Marcot, S. Tremblay
Modifier:J. Marcot Research group:marine invertebrate
Created:1999-10-06 11:56:55 Last modified:2023-11-19 19:17:22
Access level:the public Released:1999-10-06 11:56:55
Creative Commons license:CC BY
Reference information

Primary reference:
322. 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]

Secondary references:

57825 L. T. Groves. 2011. New species of Paleogene cypraeoideans (Gastropoda) from the Pacific slope of North America. The Nautilus 125(2):45-52 [P. Wagner/P. Wagner/J. Marcot]
86508 L. T. Groves and R. L. Squires. 2023. Revision of northeast Pacific Paleogene cypraeoidean gastropods (Mollusca), including recognition of three new species: Implications for paleobiogeographic distribution and faunal turnover. PaleoBios 40(10):1-52 [J. Marcot/J. Marcot]
19331 E. J. Moore. 1987. Tertiary Marine Pelycypods of California and Baja California: Plicatulidae to Ostreidae. United States Geological Survey Professional Paper 1228(C):1-53 [A. Hendy/A. Hendy]
62128 R. L. Squires. 1990. New Paleogene Fimbria (Mollusca: Bivalvia) from the Pacific coast of southwestern North America. Journal of Paleontology 64:552-556 [M. Clapham/M. Clapham]
80753 R. L. Squires. 1990. First occurrence of the Tethyan bivalve Nayadina (Exputens) in Mexico, and a review of all species of this North American subgenus. The Veliger 33(3):305-316 [J. Marcot/J. Marcot/J. Marcot]
49270 R. L. Squires. 2013. West Coast North America record of the Paleogene marine stromboid gastropod Rimella and paleobiogeography of the genus. Journal of Paleontology 87(5):826-841 [M. Uhen/S. Alam/M. Uhen]
88030 R. L. Squires and R. A. Demetrion. 1995. A New Genus of Cassiduloid Echinoid from the Lower Eocene of the Pacific Coast of Western North America and a New Report of Cassidulus ellipticus Kew, 1920, from the Lower Eocene of Baja California Sur, Mexico. Journal of Paleontology 69(3):509-515 [J. Marcot/J. Marcot]
65883 R. L. Squires and L. R. Saul. 1997. Review of bivalve genus Plicatula from Cretaceous and Lower Cenozoic strata of California and Baja California. 71(2):287-298 [P. Holroyd/S. Tremblay]