Hilltop Quarry of Schenck [Lomita Marl] (Pleistocene of the United States)

Where: California (33.8° N, 118.3° W: paleocoordinates 33.8° N, 118.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Lomita Marl Formation, Middle Pleistocene (0.8 - 0.1 Ma)

• LITHOSTRATIGRAPHY: From the Lomita Marl, which is locally overlain by the Timms Point Silt and San Pedro Sand. AGE: Early Pleistocene in Woodring et al. (1946) and Valentine PhD, but is now regarded as Middle Pleistocene [A. Hendy]. STRATIGRAPHIC POSITION: List is representation of formation at this section.

• formation-level stratigraphic resolution

Environment/lithology: offshore; unlithified, sandy, calcareous marl

• ENVIRONMENT: Typically containing and offshore fauna.
• SPECIFIC LITHOLOGY: Not listed, but generally a calcareous sandy marl. LITHIFICATION: Not stated, but typically unlithified to slightly poorly-lithified.

Size classes: macrofossils, mesofossils

Preservation: original aragonite, original calcite

Collected by S. Berry, E. P. Chace, & R. Cross; reposited in the CAS

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

• COLLECTOR: S. Berry, E. P. Chace, & R. Cross; multiple collecting events. REPOSITORY: Likely to be at CAS; former Stanford collections.

Primary reference: H. G. Schenck. 1945. Geologic Application of Biometrical Analysis of Molluscan Assemblages. Journal of Paleontology 19(5):504-521 [A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 203113: authorized by Austin Hendy, entered by Austin Hendy on 26.07.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Comprehensive for molluscs. NOMENCLATURE: Original identifications by S. Berry.
Gastropoda
 Pseudomelanoidea - Pseudomelaniidae
"Pseudomelatoma semiinflata" = Crassispira seminflata, "Antiplanes perversa" = Antiplanes catalinae
"Pseudomelatoma semiinflata" = Crassispira seminflata Grant and Gale 1931 snail
"Antiplanes perversa" = Antiplanes catalinae Raymond 1904 snail
 Neotaenioglossa - Calyptraeidae
Calyptraea cf. contorta Carpenter 1864 slipper shell
Crepidula adunca Sowerby 1824 slipper shell
Crepidula nummaria Gould 1846 slipper shell
"Crepidula lingulata" = Crepipatella lingulata Gould 1846 slipper shell
 Cerithioidea - Cerithiidae
"Alabina californica" = Elassum californicum
"Alabina californica" = Elassum californicum Dall and Bartsch 1901 cerith snail
 Sorbeoconcha - Procerithiidae
"Bittium catalinense" = Lirobittium catalinensis, "Bittium asperum" = Lirobittium asperum, "Bittium rugatum" = Lirobittium rugatum, "Bittium attenuatum" = Lirobittium attenuatum
"Bittium catalinense" = Lirobittium catalinensis Bartsch 1907 snail
"Bittium asperum" = Lirobittium asperum Gabb 1861 snail
"Bittium rugatum" = Lirobittium rugatum Carpenter 1866 snail
"Bittium attenuatum" = Lirobittium attenuatum Carpenter 1864 snail
 Sorbeoconcha - Bursidae
"Bursa californica" = Crossata ventricosa
"Bursa californica" = Crossata ventricosa Broderip 1833 frog shell
 Neogastropoda - Mitridae
"Mitra catalinae" = Mitra (Atrimitra) catalinae
"Mitra catalinae" = Mitra (Atrimitra) catalinae Dall 1919 mitre shell
 Neogastropoda - Nassariidae
"Nassarius (Schizopyga) cooperi" = Hima cooperi, "Nassarius insculptus" = Hima insculpta, "Nassarius fossatus" = Caesia fossatus, "Nassarius (Schizopyga) perpinguis" = Caesia perpinguis
"Nassarius (Schizopyga) cooperi" = Hima cooperi Forbes 1852 snail
"Nassarius insculptus" = Hima insculpta Carpenter 1864 snail
"Nassarius fossatus" = Caesia fossatus Gould 1849 snail
"Nassarius (Schizopyga) perpinguis" = Caesia perpinguis Hinds 1844 snail
 Neogastropoda - Buccinidae
"Neptunea tabulata" = Neptunea (Sulcosipho) tabulata Baird 1863 true whelk
Kelletia kelletii Forbes 1852 true whelk
 Neogastropoda - Fasciolariidae
"Fusinus barbarensis" = Barbarofusus barbarensis
"Fusinus barbarensis" = Barbarofusus barbarensis Trask 1855 snail
 Neogastropoda - Siphonaliidae
"Cantharus fortis" = Calicantharus fortis
"Cantharus fortis" = Calicantharus fortis Carpenter 1866 snail
 Neogastropoda - Columbellidae
Mitrella tuberosa Carpenter 1864 snail
 Neogastropoda - Pseudolividae
Macron aethiops Reeve 1847 snail
 Neogastropoda - Olividae
"Olivella baetica" = Callianax baetica, "Olivella biplicata" = Callianax biplicata
"Olivella baetica" = Callianax baetica Carpenter 1864 olive snail
"Olivella biplicata" = Callianax biplicata Sowerby 1825 olive snail
 Neogastropoda -
"Fusinus monksae" = Harfordia robusta
"Fusinus monksae" = Harfordia robusta Trask 1855 snail
 Neogastropoda - Strictispiridae
"Clavus (Crassispira) zizyphus" = Strictispira zizyphus
"Clavus (Crassispira) zizyphus" = Strictispira zizyphus Berry 1940 snail
 Neogastropoda - Turridae
"Moniliopsis chacei" = Ophiodermella cancellata, "Taranis strongi" = Decollidrillia strongi
"Moniliopsis chacei" = Ophiodermella cancellata Carpenter 1864 turrid
"Taranis strongi" = Decollidrillia strongi Arnold 1903 turrid
 Neogastropoda - Conidae
"Conus californicus" = Californiconus californicus, Propebela fidicula1, "Oenopota turrispira" = Propebela turrispira
"Conus californicus" = Californiconus californicus Reeve 1844 cone shell
Propebela fidicula1 Gould 1849 cone shell
"Oenopota turrispira" = Propebela turrispira Berry 1941 cone shell
 Neogastropoda - Clathurellidae
Clathurella canfieldi, "Clathurella conradiana" = Crockerella conradiana, "Clathurella tridesmia" = Crockerella tridesmia
Clathurella canfieldi Dall 1871 snail
"Clathurella conradiana" = Crockerella conradiana Gabb 1866 snail
"Clathurella tridesmia" = Crockerella tridesmia Berry 1941 snail
 Neogastropoda - Cystiscidae
Plesiocystiscus politulus1, "Marginella jewettii" = Plesiocystiscus jewetti, "Marginella (Cypraeolina) pyriformis" = Granulina margaritula
Plesiocystiscus politulus1 Dall 1919 snail
"Marginella jewettii" = Plesiocystiscus jewetti Carpenter 1857 snail
"Marginella (Cypraeolina) pyriformis" = Granulina margaritula Carpenter 1857 snail
 Neogastropoda - Muricidae
""Murex" gemma" = Maxwellia gemma, ""Murex" eldridgei" = Maxwellia eldridgei, "Ocinebra subangulata" = Urosalpinx subangulata, Boreotrophon triangulatus, ""Murex" santarosanus" = Murexiella santarosana, "Ocinebra barbarensis" = Paciocinebrina barbarensis, "Ocinebra lurida" = Paciocinebrina lurida
""Murex" gemma" = Maxwellia gemma Sowerby 1879 murex snail
""Murex" eldridgei" = Maxwellia eldridgei Arnold 1907 murex snail
"Ocinebra subangulata" = Urosalpinx subangulata Stearns 1873 murex snail
Boreotrophon triangulatus Carpenter 1864 murex snail
""Murex" santarosanus" = Murexiella santarosana Dall 1905 murex snail
"Ocinebra barbarensis" = Paciocinebrina barbarensis Gabb 1865 murex snail
"Ocinebra lurida" = Paciocinebrina lurida Middendorff 1848 murex snail
 Neogastropoda - Cancellariidae
Admete gracilior Gabb 1869 admete
 Neogastropoda -
"Mitromorpha galeana" = Cymakra galeana, "Mitromorpha barbarensis" = Cymakra gracilior
"Mitromorpha galeana" = Cymakra galeana Berry 1941 snail
"Mitromorpha barbarensis" = Cymakra gracilior Tryon 1884 snail
 Sorbeoconcha - Cypraeidae
"Cypraea fernandoensis" = Neobernaya spadicea
"Cypraea fernandoensis" = Neobernaya spadicea Swainson 1823 cowry
 Sorbeoconcha - Vermetidae
"Aletes squamigerus" = Thylacodes squamigerus
"Aletes squamigerus" = Thylacodes squamigerus Carpenter 1857 worm shell
 Sorbeoconcha - Skeneopsidae
"Skenea cyclostoma" = Skeneopsis smithi
"Skenea cyclostoma" = Skeneopsis smithi Bartsch 1927 periwinkle
 Sorbeoconcha - Caecidae
"Caecum (Micranellum) crebricinctum" = Caecum crebricinctum
"Caecum (Micranellum) crebricinctum" = Caecum crebricinctum Carpenter 1864 snail
 Sorbeoconcha - Rissoidae
Rissoina kelseyi, "Alvania acutilirata" = Actonia compacta
Rissoina kelseyi Dall and Bartsch 1902 snail
"Alvania acutilirata" = Actonia compacta Carpenter 1864 snail
 Sorbeoconcha - Barleeiidae
Barleeia oldroydi, "Barleeia marmorea" = Pseudodiala acuta
Barleeia oldroydi Bartsch 1920 snail
"Barleeia marmorea" = Pseudodiala acuta Carpenter 1864 snail
 Sorbeoconcha - Naticidae
"Natica (Tectonatica) clausa" = Cryptonatica affinis
"Natica (Tectonatica) clausa" = Cryptonatica affinis Gmelin 1791 moon snail
 Epitonioidea - Epitoniidae
"Epitonium (Opalia) chacei" = Opalia borealis, ""Alabina" effiae" = Acirsella effiae
"Epitonium (Opalia) chacei" = Opalia borealis Gould 1852 wentletrap
""Alabina" effiae" = Acirsella effiae Willett 1939 wentletrap
 Vanikoroidea - Eulimidae
"Balcis (Vitreolina) thersites" = Melanella thersites
"Balcis (Vitreolina) thersites" = Melanella thersites Carpenter 1864 snail
 Heterostropha - Ringiculidae
"Actaeon (Microglyphis) schencki" = Microglyphis breviculus
"Actaeon (Microglyphis) schencki" = Microglyphis breviculus Dall 1902 snail
 Heterostropha - Pyramidellidae
"Iselica fenestrata" = Iselica ovoidea
"Iselica fenestrata" = Iselica ovoidea Gould 1853 snail
 Lepetellida - Fissurellidae
"Puncturella cucullata" = Craniopsis cucullata, Diodora arnoldi1
"Puncturella cucullata" = Craniopsis cucullata Gould 1846 puncturella
Diodora arnoldi1 McLean 1966 snail
 Trochoidea - Turbinidae
"Astraea (Pomaulax) petrothauma" = Megastraea turbanica, "Astraea (Pomaulax) undosa" = Megastraea undosa, Pomaulax gibberosa1, "Margarites cf. pupillus" = Pupillaria pupilla, "Homalopoma bacula" = Homalopoma (Homalopoma) baculum, "Homalopoma fenestratum" = Homalopoma (Homalopoma) radiatum, "Homalopoma carpenteri" = Homalopoma (Homalopoma) luridum, Homalopoma paucicostatum
"Astraea (Pomaulax) petrothauma" = Megastraea turbanica Dall 1900 snail
"Astraea (Pomaulax) undosa" = Megastraea undosa Wood 1828 snail
Pomaulax gibberosa1 Dillwyn 1817 red turban
"Margarites cf. pupillus" = Pupillaria pupilla Gould 1849 snail
"Homalopoma bacula" = Homalopoma (Homalopoma) baculum Carpenter 1864 snail
"Homalopoma fenestratum" = Homalopoma (Homalopoma) radiatum Dall 1918 snail
"Homalopoma carpenteri" = Homalopoma (Homalopoma) luridum Dall 1885 snail
Homalopoma paucicostatum Dall 1871 snail
 Trochoidea - Liotiidae
Liotia fenestrata Carpenter 1864 snail
 Trochoidea - Trochidae
Calliostoma grantianum, Calliostoma cf. supragranosum, Calliostoma canaliculatum, "Margarites (Lirularia) arestus" = Lirularia aresta, "Margarites (Lirularia) lirulatus" = Lirularia lirulata, "Margarites (Lirularia) parcipictus" = Lirularia parcipicta, "Tegula (Chlorostoma) aureotincta" = Chlorostoma aureotincta, "Tegula (Chlorostoma) funebralis" = Chlorostoma funebrale, "Halistylus subpupoideus" = Halistylus pupoideus
Calliostoma grantianum Berry 1940 top snail
Calliostoma cf. supragranosum Carpenter 1864 top snail
Calliostoma canaliculatum Lightfoot 1786 top snail
"Margarites (Lirularia) arestus" = Lirularia aresta Berry 1941 top snail
"Margarites (Lirularia) lirulatus" = Lirularia lirulata Carpenter 1864 top snail
"Margarites (Lirularia) parcipictus" = Lirularia parcipicta Carpenter 1864 top snail
"Tegula (Chlorostoma) aureotincta" = Chlorostoma aureotincta Forbes 1852 top snail
"Tegula (Chlorostoma) funebralis" = Chlorostoma funebrale Adams 1855 top snail
"Halistylus subpupoideus" = Halistylus pupoideus Carpenter 1864 top snail
 Trochoidea - Tegulidae
Norrisia norrisii Sowerby I 1838 snail
 Trochoidea - Skeneidae
"Liotia acuticostata" = Parviturbo acuticostatus
"Liotia acuticostata" = Parviturbo acuticostatus Carpenter 1864 snail
 Trochoidea - Phasianellidae
"Phasianella compta" = Eulithidium comptum
"Phasianella compta" = Eulithidium comptum Gould 1855 snail
 Opisthobranchia - Cylichnidae
"Retusa harpa" = Acteocina harpa
"Retusa harpa" = Acteocina harpa Dall 1871 barrel-bubble
 Patellida - Lottiidae
"Acmaea lepisma" = Lottia depicta
"Acmaea lepisma" = Lottia depicta Hinds 1842 limpet
Bivalvia
 Nuculanida - Nuculanidae
"Nuculana praecursor" = Nuculana (Nuculana) minuta
"Nuculana praecursor" = Nuculana (Nuculana) minuta Müller 1776 pointed nut clam
 Lucinida - Lucinidae
"Lucina (Codakia) californica" = Epilucina californica, "Lucina (Parvilucina) tenuisculpta" = Parvilucina tenuisculpta
"Lucina (Codakia) californica" = Epilucina californica Conrad 1837 clam
"Lucina (Parvilucina) tenuisculpta" = Parvilucina tenuisculpta Carpenter 1864 clam
 Hiatellida - Hiatellidae
"Saxicava arctica" = Hiatella arctica
"Saxicava arctica" = Hiatella arctica Linnaeus 1767 clam
 Cardiida - Tellinidae
"Tellina carpenteri" = Ameritella carpenteri
"Tellina carpenteri" = Ameritella carpenteri Dall 1900 tellin clam
 Cardiida - Semelidae
"Semele pulchra" = Semele (Semele) pulchra
"Semele pulchra" = Semele (Semele) pulchra Sowerby I 1832 clam
 Cardiida - Cardiidae
"Nemocardium centifilosum" = Nemocardium (Keenaea) centifilosum, "Trachycardium quadragenarium" = Dallocardia quadragenarium
"Nemocardium centifilosum" = Nemocardium (Keenaea) centifilosum Carpenter 1864 cockle
"Trachycardium quadragenarium" = Dallocardia quadragenarium Conrad 1837 cockle
 Cardiida - Chamidae
"Pseudochama cf. exogyra" = Chama exogyra
"Pseudochama cf. exogyra" = Chama exogyra Conrad 1837 jewel box
 Cardiida - Veneridae
"Ventricola fordii" = Globivenus fordii, "Transennella tantilla" = Nutricola tantilla, "Psephidia ovalis" = Nutricola ovalis, "Psephidia cymata" = Nutricola cymata
"Ventricola fordii" = Globivenus fordii Yates 1890 venus clam
"Transennella tantilla" = Nutricola tantilla Gould 1853 venus clam
"Psephidia ovalis" = Nutricola ovalis Dall 1902 venus clam
"Psephidia cymata" = Nutricola cymata Dall 1913 venus clam
 Carditida - Carditidae
Glans carpenteri, "Cardita (Miodontiscus) prolongata" = Miodontiscus prolongatus, "Cardita cf. ventricosa" = Coanicardita ventricosa
Glans carpenteri Lamy 1922 clam
"Cardita (Miodontiscus) prolongata" = Miodontiscus prolongatus Carpenter 1864 clam
"Cardita cf. ventricosa" = Coanicardita ventricosa Gould 1850 clam
 Carditida - Crassatellidae
"Crassatella lomitensis" = Hybolophus fluctuatus
"Crassatella lomitensis" = Hybolophus fluctuatus Carpenter 1864 clam
 Arcida - Arcidae
Arca (Arca) sisquocensis Reinhart 1937 ark
 Arcida - Glycymerididae
"Glycymeris septentrionalis" = Glycymeris septentrionalis2, "Glycymeris subobsoleta" = Glycymeris septentrionalis
"Glycymeris septentrionalis" = Glycymeris septentrionalis2 Middendorf 1849 clam
"Glycymeris subobsoleta" = Glycymeris septentrionalis Middendorf 1849 clam
 Pectinida - Pectinoidae
Chlamys sp.1 Röding 1798 scallop
 Mytilida - Crenellidae
Crenella decussata1 Montagu 1808 clam
Scaphopoda
 Dentaliida - Dentaliidae
"Dentalium pretiosum" = Antalis pretiosa
"Dentalium pretiosum" = Antalis pretiosa Nuttall in Sowerby 1860 tusk shell