List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Chondrichthyes
- Lamniformes
- Lamnidae
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Isurus cf. praecursor
Thurmond and Jones 1981
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Squires 1984 | |||||||||
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Bivalvia
- Carditida
- Carditidae
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Glyptoactis (Glyptoactis) domenginica
(Vokes 1939)
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Squires 1984 | |||||||||
| recombined as Glyptoactis (Claibornicardia) domenginica | ||||||||||
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Bivalvia
- Pholadida
- Corbulidae
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Corbula (Caryocorbula) dickersoni
(Weaver and Palmer 1922)
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Squires 1984 | |||||||||
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Bivalvia
- Cardiida
- Veneridae
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Pitar (Lamelliconcha) joaquinensis
Vokes 1939
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Squires 1984 | |||||||||
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Pitar (Calpitaria) uvasanus
(Conrad 1855)
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Squires 1984 | |||||||||
| recombined as Pitar uvasana | ||||||||||
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Callocardia (Nitidavenus) tejonensis
(Waring 1914)
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Squires 1984 | |||||||||
| recombined as Nitidavenus tejonensis | ||||||||||
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Bivalvia
- Cardiida
- Cardiidae
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Acanthocardia (Schedocardia) brewerii
(Gabb 1864)
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Squires 1984 | |||||||||
| recombined as Schedocardia brewerii | ||||||||||
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Bivalvia
- Mytilida
- Mytilidae
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Brachidontes (Brachidontes) cowlitzensis
(Weaver and Palmer 1922)
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Squires 1984 | |||||||||
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Bivalvia
- Arcida
- Glycymerididae
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Glycymeris (Glycymerita) sagittata
(Gabb 1864)
|
Squires 1984 | |||||||||
| recombined as Glycymerita sagittata | ||||||||||
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Scaphopoda
- Dentaliida
- Dentaliidae
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Dentalium stentor
Anderson and Hanna 1925
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Squires 1984 | |||||||||
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Dentalium (Laevidentalium) calafium
Vokes 1939
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Squires 1984 | |||||||||
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Gastropoda
- Opisthobranchia
- Retusidae
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Cylichnina tantilla
(Anderson and Hanna 1925)
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Squires 1984 | |||||||||
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Gastropoda
- Ampullinidae
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Eocernina hannibali
(Dickerson 1914)
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Squires 1984 | |||||||||
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Pachycrommium clarki
(Stewart 1927)
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Squires 1984 | |||||||||
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Gastropoda
- Neotaenioglossa
- Calyptraeidae
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Calyptraea diegoana
(Conrad 1855)
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Squires 1984 | |||||||||
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Gastropoda
- Turritellidae
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Turritella uvasana
Conrad 1855
|
Squires 1984 | |||||||||
| as Turritella uvasana applinae | ||||||||||
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Turritella buwaldana
Dickerson 1916
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Squires 1984 | |||||||||
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Gastropoda
- Cassidae
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Phalium (Semicassis) tuberculiformis
(Gabb 1864)
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Squires 1984 | |||||||||
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Galeodea (Gomphopages) susanae
(Schenck 1926)
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Squires 1984 | |||||||||
| synonym of Galeodea sutterensis | ||||||||||
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Gastropoda
- Ranellidae
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Cymatium janetae n. sp.
Squires 1983
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Gastropoda
- Bursidae
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Ranellina pilsbryi
Stewart 1927
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Squires 1984 | |||||||||
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Gastropoda
- Ficidae
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Ficopsis remondii
(Gabb 1864)
|
Squires 1984 | |||||||||
| recombined as Ficus remondii | ||||||||||
| as Ficopsis remondii crescentensis | ||||||||||
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Gastropoda
- Strombidae
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Ectinochilus (Macilentos) macilentus
(White 1889)
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Squires 1984 | |||||||||
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Gastropoda
- Seraphsidae
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Paraseraphs erraticus
(Cooper 1894)
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Squires 1984 | |||||||||
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Gastropoda
- Neogastropoda
- Volutidae
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Lyria andersoni
Waring 1917
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Squires 1984 | |||||||||
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Gastropoda
- Neogastropoda
- Muricidae
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Laevityphis (Laevityphis) antiquus
(Gabb 1864)
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Squires 1984 | |||||||||
| original and current combination Typhis antiquus | ||||||||||
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Pterynotus (Pterynotus) washingtonicus
Squires and Goedert 1995
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Squires 2001 | |||||||||
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Gastropoda
- Neogastropoda
- Pseudolividae
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Pseudoliva lineata
Gabb 1864
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Squires 1984 | |||||||||
| recombined as Calorebama dilleri lineata | ||||||||||
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Gastropoda
- Neogastropoda
- Conidae
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Conus caleocius
Vokes 1939
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Squires 1984 | |||||||||
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Conus hornii
Gabb 1864
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Squires 1984 | |||||||||
| as Conus hornii umpquaensis | ||||||||||
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Gastropoda
- Neogastropoda
- Clathurellidae
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Domenginella claytonensis
(Gabb 1864)
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Squires 1984 | |||||||||
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Gastropoda
- Neogastropoda
- Turridae
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? Cochlespiropsis jenkinsi n. sp.
Squires 2001
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Squires 2001 | |||||||||
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Surculites mathewsonii
(Gabb 1864)
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Squires 1984 | |||||||||
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Pleurofusia fresnoensis
(Arnold 1909)
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Squires 1984 | |||||||||
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Gastropoda
- Neogastropoda
- Clavatulidae
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Fusiturricula (Crenaturricula) crenatospira
(Cooper 1894)
|
Squires 1984 | |||||||||
| recombined as Crenaturricula crenatospira | ||||||||||
| as Fusiturricula (Crenaturricula) crenatospira domenginica | ||||||||||
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Gastropoda
- Neogastropoda
- Mitridae
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? Proximitra cretacea
(Gabb 1864)
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Squires 1984 | |||||||||
| original and current combination Mitra cretacea | ||||||||||
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Gastropoda
- Neogastropoda
- Ancillariidae
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Ancilla (Spirancilla) gabbi
(Cossman 1899)
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Squires 1984 | |||||||||
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Gastropoda
- Perissityidae
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Clavilithes sp. n. sp.
Swainson 1840
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Clavilithes tabulatus
(Dickerson 1913)
|
Squires 1984 | |||||||||
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Fusinus aff. ucalius
Vokes 1939
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Squires 1984 | |||||||||
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Gastropoda
- Fasciolariidae
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Cerithiopsis llajasensis n. sp.
Squires 1984
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Squires 1984 | |||||||||
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Amaurellina caleocia
Vokes 1939
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Squires 2001 | |||||||||
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Natica (Naticarius) aff. uvasana
(Gabb 1864)
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Squires 1984 | |||||||||
| original and current combination Natica uvasana | ||||||||||
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Sinum obliquum
(Gabb 1864)
|
Squires 1984 | |||||||||
| original and current combination Naticina obliqua | ||||||||||
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Tejonia moragai
(Stewart 1927)
|
Squires 1984 | |||||||||
| original and current combination Amaurellina moragai | ||||||||||
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Gastropoda
- Heterostropha
- Architectonicidae
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Architectonica (Stellaxis) cognata
(Gabb 1864)
|
Squires 1984 | |||||||||
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Architectonica (Architectonica) llajasensis
(Sutherland 1966)
|
Squires 1984 | |||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | California | County: | Los Angeles |
| Coordinates: | 34.0° North, 118.0° West (view map) | ||||
| Paleocoordinates: | 35.8° North, 102.2° West | ||||
| Geographic resolution: | small collection |
Time
| Period: | Paleogene | Epoch: | Eocene |
| 10 m.y. bin: | Cenozoic 2 | ||
| *Period: | Early/Lower Tertiary - Middle Tertiary | *Epoch: | Early/Lower Eocene - Middle Eocene |
| *International age/stage: | Middle Lutetian - Early/Lower Ypresian | *Local age/stage: | Domengine - Domengine |
| Key time interval: | Ypresian - Lutetian | ||
| Age range of interval: | 56.00000 - 41.20000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Llajas | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: The stewart bed is a 1 m thick sandstone unit in the middle of the LLajas formation. | |||||
Lithology and environment
| Primary lithology: | bioturbation sandstone |
| Includes fossils? | Y |
| Lithology description: sandstone. | |
| Environment: | offshore |
| Geology comments: The stewart bed is located in a section of transition from shallow-marine to outer slope and shelf facies. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | all microfossils,some macrofossils |
| Collection methods: | bulk,field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | LACM |
| Taxonomic list comments:New species only. | |
Metadata
| Also known as: | LACMIP loc. 40371 | ||
| Database number: | 8011 | ||
| Authorizer: | L. Ivany, J. Marcot, A. Hendy | Enterer: | E. Kowalski, J. Marcot, A. Hendy |
| Modifier: | J. Marcot | Research group: | marine invertebrate |
| Created: | 2000-06-12 07:12:01 | Last modified: | 2023-11-28 11:56:49 |
| Access level: | the public | Released: | 2000-06-12 07:12:01 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 519. | R. L. Squires. 1983. New Mollusks from the Lower Middle Eocene Llajas Formation, Southern California. Journal of Paleontology 57(2):354-362 [L. Ivany/E. Kowalski/J. Marcot] |
Secondary references:
| 59877 | R. L. Squires. 1984. Megapaleontology of the Eocene Llajas Formation, Simi Valley, California. Contributions in Science, Natural History Museum of Los Angeles County 350:1-76 [M. Clapham/M. Clapham] | |
| 13852 | R. L. Squires. 2001. Additions to the Eocene megafossil fauna of the Llajas Formation, Simi Valley, southern California. Contributions in Science (Natural History Museum of Los Angeles County) 489:1-40 [A. Miller/A. Hendy/A. Hendy] |