CIT Loc. 274 (Pleistocene of the United States)

Also known as LACMIP loc. 6990

Where: Los Angeles County, California (33.7° N, 118.3° W: paleocoordinates 33.7° N, 118.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Timms Point Silt Formation, Middle Pleistocene (0.8 - 0.1 Ma)

• LITHOSTRATIGRAPHY: From "Timms Point beds", which locally overly Miocene shale. AGE: Pleistocene, following Clark (1931), but edited to middle Pleistocene by enterer on the basis of established modern age control. STRATIGRAPHIC DETAILS: Stratigraphic position uncertain.

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; unlithified siltstone

• ENVIRONMENT: fauna is characteristic of offshore soft-bottom settings.
• LITHOLOGY: shale. LITHIFICATION: not reported in text, but fossils in LACMIP collection from these localities are unlithified.

Size classes: macrofossils, mesofossils

Preservation: original aragonite, original calcite

Collected in 1929; reposited in the CIT, LACM

Collection methods: bulk, surface (float), surface (in situ),

• COLLECTOR: Multiple student collectors, 1929. REPOSITORY: LACMIP, including former CIT collections.

Primary reference: A. Clark. 1931. The cool-water Timms Point Pleistocene horizon at San Pedro, California. Transactions of the San Diego Society of Natural History 7:25-42 [A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 202648: authorized by Austin Hendy, entered by Austin Hendy on 16.07.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for invertebrates. NOMENCLATURE: Antiquated, but mostly with species-resolution identifications.
unclassified
  -
Rhynchonellata
 Terebratulida - Laqueidae
Laqueus californicus Koch 1848
SUBSPECIES: Laqueus californicus vancouverensis
Gymnolaemata
 Cheilostomata - Celleporidae
 Cheilostomata - Cellariidae
 Cheilostomata - Microporellidae
 Cheilostomata - Tubucellariidae
Stenolaemata
 Cyclostomata - Multisparsidae
Idmonea californica Conrad 1855
 Cyclostomata - Entalophoridae
 Cyclostomata - Oncousoeciidae
Gastropoda
 Cerithioidea - Turritellidae
"Turritella cooperi" = Turritella cooperi, "Turritella jewettii" = Turritella cooperi
"Turritella cooperi" = Turritella cooperi Carpenter 1864 turret shell
"Turritella jewettii" = Turritella cooperi Carpenter 1864 turret shell
 Sorbeoconcha - Vermetidae
"Spiroglyphus lituellus" = Dendropoma lituella
"Spiroglyphus lituellus" = Dendropoma lituella Morch 1861 worm shell
 Sorbeoconcha - Naticidae
"Tectonatica clausa" = Cryptonatica affinis
"Tectonatica clausa" = Cryptonatica affinis Gmelin 1791 moon snail
 Sorbeoconcha - Ranellidae
Fusitriton oregonensis Redfield 1846 triton shell
 Neogastropoda - Mitridae
"Mitra idae" = Mitra (Atrimitra) idae
"Mitra idae" = Mitra (Atrimitra) idae Melville 1893 mitre shell
 Neogastropoda - Cancellariidae
Admete gracilior1 Gabb 1869 admete
SUBSPECIES: Admete couthouyi gracilior
 Neogastropoda - Borsoniidae
Borsonella bartschi Arnold 1903 snail
 Neogastropoda - Nassariidae
"Nassarius perpinguis" = Caesia perpinguis, "Nassarius mendicus" = Hima mendica
"Nassarius perpinguis" = Caesia perpinguis Hinds 1844 snail
"Nassarius mendicus" = Hima mendica Gould 1849 snail
 Neogastropoda - Buccinidae
""Exilia" rectirostris" = Exilioidea rectirostris, "Neptunea tabulata" = Neptunea (Sulcosipho) tabulata
""Exilia" rectirostris" = Exilioidea rectirostris Carpenter 1864 true whelk
"Neptunea tabulata" = Neptunea (Sulcosipho) tabulata Baird 1863 true whelk
 Neogastropoda - Fasciolariidae
Barbarofusus barbarensis Trask 1855 snail
 Neogastropoda - Muricidae
Boreotrophon orpheus Gould 1842 murex snail
SUBSPECIES: Boreotrophon orpheus praccursor
 Neogastropoda - Olividae
"Olivella biplicata" = Callianax biplicata
"Olivella biplicata" = Callianax biplicata Sowerby 1825 olive snail
 Sorbeoconcha - Procerithiidae
"Bittium larum" = Lirobittium larum, Lirobittium latifilosum2, "Bittium cf. rugatum" = Lirobittium rugatum
"Bittium larum" = Lirobittium larum Bartsch 1911 snail
Lirobittium latifilosum2 Bartsch 1911 snail
SUBSPECIES: Bittium attenuata boreale
"Bittium cf. rugatum" = Lirobittium rugatum Carpenter 1866 snail
 Pseudomelanoidea - Pseudomelaniidae
"Antiplanes perversa" = Antiplanes catalinae
"Antiplanes perversa" = Antiplanes catalinae Raymond 1904 snail
 Seguenzioidea - Eucyclidae
Turcica caffea Gabb 1865 snail
 Trochoidea - Trochidae
"Margarites optabilis" = Lirularia optabilis, Calliostoma annulatum
"Margarites optabilis" = Lirularia optabilis Carpenter 1864 top snail
Calliostoma annulatum Lightfoot 1786 top snail
 Lepetellida - Fissurellidae
"Puncturella cucullata" = Craniopsis cucullata
"Puncturella cucullata" = Craniopsis cucullata Gould 1846 puncturella
Bivalvia
 Nuculanida - Nuculanidae
Nuculana minuta Müller 1776 pointed nut clam
SUBSPECIES: Nuculana minuta praecursor
 Nuculida - Nuculidae
"Acila castrensis" = Acila (Truncacila) castrensis
"Acila castrensis" = Acila (Truncacila) castrensis Hinds 1843 divaricate nutclam
 Pectinida - Pectinoidae
""Pecten" caurinus" = Patinopecten caurinus, Chlamys jordani, "Chlamys hastatus" = Chlamys hastata
""Pecten" caurinus" = Patinopecten caurinus Gould 1850 scallop
Chlamys jordani Arnold 1903 scallop
"Chlamys hastatus" = Chlamys hastata Sowerby 1842 scallop
SUBSPECIES: Chlamys hastatus hastatus
 Lucinida - Lucinidae
"Lucina annulata" = Lucinoma annulatum, "Lucina tenuisculpta" = Parvilucina tenuisculpta
"Lucina annulata" = Lucinoma annulatum Reeve 1850 clam
"Lucina tenuisculpta" = Parvilucina tenuisculpta Carpenter 1864 clam
 Lucinida - Thyasiridae
"Axinopsis viridis" = Axinopsida serricata
"Axinopsis viridis" = Axinopsida serricata Carpenter 1864 clam
 Cardiida - Cardiidae
""Protocardia" centifilosa" = Nemocardium (Keenaea) centifilosum, "Cerastoderma corbis" = Clinocardium (Clinocardium) nuttallii
""Protocardia" centifilosa" = Nemocardium (Keenaea) centifilosum Carpenter 1864 cockle
"Cerastoderma corbis" = Clinocardium (Clinocardium) nuttallii Conrad 1837 cockle
 Cardiida - Tellinidae
"Macoma calcarea" = Macoma (Macoma) calcarea, "Tellina buttoni" = Ameritella modesta
"Macoma calcarea" = Macoma (Macoma) calcarea Gmelin 1792 tellin clam
"Tellina buttoni" = Ameritella modesta Carpenter 1864 tellin clam
 Cardiida - Chamidae
"Pseudochama exogyra" = Chama exogyra
"Pseudochama exogyra" = Chama exogyra Conrad 1837 jewel box
 Cardiida - Veneridae
"Psephidia cymata" = Nutricola cymata, "Psephidia ovalis" = Nutricola ovalis, "Venerella subdiaphana" = Compsomyax subdiaphana
"Psephidia cymata" = Nutricola cymata Dall 1913 venus clam
"Psephidia ovalis" = Nutricola ovalis Dall 1902 venus clam
"Venerella subdiaphana" = Compsomyax subdiaphana Carpenter 1864 venus clam
 Carditida - Carditidae
"Cardita ventricosa" = Coanicardita ventricosa
"Cardita ventricosa" = Coanicardita ventricosa Gould 1850 clam