San Nicholas Island (SN-1): Quaternary, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Ateles squamigerus
Cysticus cf. jewettii
Cysticus cf. regularis
Thecostraca - Balanomorpha - Tetraclitidae
Tetraclita squamosa
Subspecies: Tetraclita squamosa rubescens
Scaphopoda - Dentaliida - Dentaliidae
Dentalium semipolitum Broderip and Sowerby 1829
    = Graptacme semistriata Turton 1819
Hendy 2020
Gastropoda - Heterostropha - Pyramidellidae
Odostomia cf. oldroydi
Odostomia terricula
Odostomia cf. eugena
Turbonilla cf. raymondi
Turbonilla cf. valdezi (Dall and Bartsch 1907)
Turbonilla tenuicula (Gould 1853)
recombined as Pyrgiscus tenuiculus
Odostomia cf. io Dall and Bartsch 1909
Gastropoda - Heterostropha - Trimusculidae
Trimusculus reticulatus (Sowerby 1835)
recombined as Trimusculus reticulata
Gastropoda - Epitoniidae
Epitonium cf. indianorum (Carpenter 1864)
Opalia cf. evicta
Opalia wroblewskyi (Mörch 1876)
synonym of Opalia borealis
Gastropoda - Cerithiidae
Bittium eschrichtii (Middendorff 1849)
recombined as Neostylidium eschrichtii
Subspecies: Bittium eschrichtii montereyense
Gastropoda - Eulimidae
Balcis thersites (Carpenter 1864)
recombined as Melanella thersites
Balcis cf. prefalcata Bartsch 1917
synonym of Vitreolina macra
Gastropoda - Neotaenioglossa - Calyptraeidae
Crepidula aculeata (Gmelin 1791)
    = Bostrycapulus decorus Collin 2019
Hendy 2020
Crepidula adunca Sowerby 1824
Crepidula perforans Valenciennes 1846
Gastropoda - Triphoridae
Triphora cf. pedroana (Bartsch 1907)
recombined as Monophorus pedroanus
Gastropoda - Cerithiopsidae
Cerithiopsis sp. Hanley 1849
Gastropoda - Vermetidae
Petaloconchus anellum
Petaloconchus complicatus Dall 1908
Spiroglyphus lituellus (Morch 1861)
recombined as Dendropoma lituella
Gastropoda - Neogastropoda - Muricidae
? Morula cf. lugubris (Sowerby I 1822)
recombined as Mexacanthina lugubris
Acanthina spirata (Blainville 1832)
recombined as Acanthinucella spirata
Subspecies: Acanthina spirata punctulata
Ocenebra circumtexta
Ocenebra cf. beta
Ocenebra lurida (Middendorff 1848)
recombined as Paciocinebrina lurida
Subspecies: Ocenebra lurida munda
Ocenebra interfossa (Carpenter 1864)
recombined as Paciocinebrina interfossa
Ocenebra cf. foveolata (Hinds 1844)
recombined as Paciocinebrina foveolata
Ocenebra subangulata (Stearns 1873)
recombined as Urosalpinx subangulata
Boreotrophon stuarti (Smith 1880)
Gastropoda - Neogastropoda - Cystiscidae
Gibberulina pyriformis (Carpenter 1864)
synonym of Granulina margaritula
Gastropoda - Neogastropoda - Mitridae
Mitra idae Melville 1893
recombined as Mitra (Atrimitra) idae
Gastropoda - Neogastropoda - Olividae
Olivella biplicata (Sowerby 1825)
recombined as Callianax biplicata
Olivella cf. pedroana (Conrad 1855)
recombined as Callianax pedroana
Gastropoda - Neogastropoda - Nassariidae
Nassarius mendicus (Gould 1849)
recombined as Hima mendica
Subspecies: Nassarius mendicus cooperi
Gastropoda - Neogastropoda - Fasciolariidae
Barbarofusus monksae
Barbarofusus cf. kobelti (Dall 1877)
Gastropoda - Neogastropoda - Columbellidae
Mitrella tuberosa (Carpenter 1864)
Amphissa versicolor Dall 1871
Mitrella carinata (Hinds 1844)
recombined as Alia carinata
Gastropoda - Neogastropoda - Mangeliidae
Mangelia cf. variegata Carpenter 1864
recombined as Tenaturris variegata
Mangelia aff. rhyssa
corrected as Cythara (Mangelia)
Mangelia ? interfossa Carpenter 1864
recombined as Perimangelia interfossa
Gastropoda - Neogastropoda - Conidae
Conus californicus Reeve 1844
recombined as Californiconus californicus
Gastropoda - Neogastropoda - Pseudomelatomidae
Pseudomelatoma cf. tororsa
Gastropoda - Neogastropoda
Barbarofusus arnoldi (Cossmann 1903)
recombined as Harfordia arnoldi
Mitromorpha cf. gracilior (Tryon 1884)
recombined as Cymakra gracilior
Mitromorpha cf. aspera (Carpenter 1864)
recombined as Cymakra aspera
Gastropoda - Naticidae
Lunatia cf. lewisii (Gould 1847)
recombined as Euspira lewisii
Gastropoda - Vitrinellidae
Vitrinella stearnsii (Bartsch 1907)
recombined as Docomphala stearnsi
Vitrinella cf. oldroydi Bartsch 1907
Gastropoda - Assimineidae
Assiminea translucens (Carpenter 1864)
Gastropoda - Caecidae
Caecum dalli Bartsch 1920
synonym of Caecum quadratum
Caecum californicum Dall 1885
Fartulum occidentale Bartsch 1920
synonym of Fartulum dextroversum
Fartulum orcutti (Dall in Orcutt 1885)
Gastropoda - Barleeiidae
Barleeia ? subtenuis Carpenter 1864
Barleeia cf. oldroydi Bartsch 1920
"Diala" cf. marmorea Carpenter 1864
synonym of Pseudodiala acuta
Amphithalamus tenuis Bartsch 1911
Amphithalamus inclusus Lozouet 1998
Gastropoda - Rissoidae
"Rissoina" aequisculpta (Keep 1887)
recombined as Alvinia aequisculpta
Alvania purpurea Dall 1871
recombined as Alvinia purpurea
Alvania almo
Alvania cf. oldroydae Bartsch 1911
recombined as Actonia oldroydae
Alvania cf. acutelirata (Carpenter 1864)
synonym of Actonia compacta
Gastropoda - Littorinidae
Lacuna unifasciata Carpenter 1857
recombined as Lacuna (Epheria) unifasciata
Littorina scutulata Gould 1849
recombined as Littorina (Littorina) scutulata
Littorina planaxis Philippi 1847
replaced by Littorina (Neritrema) keenae
Gastropoda - Hipponicidae
Hipponix antiquatus (Linnaeus 1767)
    = Antisabia panamensis Adams 1852
Hendy 2020
Hipponix tumens (Carpenter 1864)
Gastropoda - Procerithiidae
Bittium attenuatum Carpenter 1864
recombined as Lirobittium attenuatum
Bittium armillatum Carpenter 1864
recombined as Lirobittium armillatum
Gastropoda - Siphonariidae
"Siphonaria" brannani
Gastropoda - Turbinidae
Astraea gibberosa (Dillwyn 1817)
recombined as Pomaulax gibberosa
Homalopoma carpenteri (Pilsbry 1889)
synonym of Homalopoma (Homalopoma) luridum
Arene acuticostata
Subspecies: Arene acuticostata radiata
Gastropoda - Trochidae
"Tegula" montereyi (Kiener 1850)
recombined as Chlorostoma montereyi
Tegula funebralis (Adams 1855)
original and current combination Chlorostoma funebrale
Tegula cf. brunnea (Philippi 1849)
recombined as Chlorostoma brunnea
Calliostoma ligatum (Gould 1849)
recombined as Calliostoma ligatus
Halistylus pupoideus (Carpenter 1864)
Pupillaria cf. optabilis (Carpenter 1864)
recombined as Lirularia optabilis
Gastropoda - Phasianellidae
Tricolia cf. rubrilineata
Tricolia cf. pulloides (Carpenter 1865)
recombined as Eulithidium pulloides
Gastropoda - Lepetellida - Fissurellidae
Diodora aspera (Rathke 1833)
Fissurella volcano Reeve 1849
Gastropoda - Lepetellida - Haliotidae
Haliotis cracherodii Leach 1814
Haliotis rufescens Swainson 1822
Gastropoda - Opisthobranchia - Cylichnidae
Acteocina culcitella (Gould 1853)
Gastropoda - Patellida - Lottiidae
Acmaea digitalis Eschscholtz 1833
recombined as Lottia digitalis
Acmaea limatula (Carpenter 1864)
original and current combination Patella limatula
Acmaea insessa (Hinds 1842)
recombined as Lottia insessa
Acmaea instabilis (Gould 1846)
recombined as Lottia instabilis
Acmaea ? pelta Eschscholtz 1833
recombined as Lottia pelta
Acmaea scabra (Gould 1846)
original and current combination Patella (Lottia) scabra
Acmaea mitra Eschscholtz 1833
Polyplacophora - Chitonida - Callistoplacidae
Callistochiton crassicostatus Pilsbry 1893
Polyplacophora - Neoloricata - Mopaliidae
Mopalia muscosa (Gould 1846)
Dendrochiton cf. thamnopora
spelled with current rank as Mopalia (Dendrochiton)
Mopalia cf. ciliata (Sowerby 1840)
Placiphorella cf. velata Carpenter 1879
Polyplacophora - Neoloricata - Acanthochitonidae
"Cryptochiton" stelleri (Middendorf 1847)
Polyplacophora - Neoloricata - Ischnochitonidae
Stenoplax sp. Carpenter 1879
Stenoplax cf. conspicuus (Carpenter 1879)
recombined as Ischnochiton (Stenoplax) conspicua
Lepidozona sp. Pilsbry 1892
Lepidozona cf. californiensis
Tonicella lineata (Wood 1815)
Cyanoplax cf. dentiens (Gould 1846)
Bivalvia - Mytilida - Mytilidae
Septifer cf. bifurcatus (Conrad 1837)
Bivalvia - Ostreida - Ostreidae
Ostrea lurida Carpenter 1864
Bivalvia - Pectinida - Pectinidae
Chlamys cf. hastatus (Sowerby 1842)
recombined as Chlamys hastata
Bivalvia - Arcida - Glycymerididae
Glycymeris subobsoleta (Carpenter 1864)
synonym of Glycymeris septentrionalis
Bivalvia - Lucinida - Lucinidae
Epilucina californica (Conrad 1837)
original and current combination Phacoides californicus
Bivalvia - Pholadida - Pholadidae
Penitella penita (Conrad 1837)
Bivalvia - Cardiida - Veneridae
Petricola carditoides (Conrad 1837)
recombined as Petricola (Petricola) carditoides
Irus lamellifer (Conrad 1837)
recombined as Irusella lamellifera
Protothaca staminea (Conrad 1837)
recombined as Leukoma staminea
Transennella tantilla (Gould 1853)
recombined as Nutricola tantilla
Bivalvia - Cardiida - Semelidae
Cumingia californica Conrad 1837
Bivalvia - Cardiida - Neoleptonidae
Bernardina bakeri Dall 1910
Bivalvia - Cardiida - Lasaeidae
Lasaea cf. cistula Keen 1938
synonym of Lasaea adansoni
Bivalvia - Hiatellida - Hiatellidae
Hiatella cf. arctica (Linnaeus 1767)
Bivalvia - Carditida - Carditidae
Glans subquadrata (Carpenter 1864)
synonym of Glans carpenteri
Rhynchonellata - Terebratulida - Cancellothyrididae
Terebratulina unguicula (Carpenter 1864)
original and current combination Terebratula unguiculus
Echinoidea - Camarodonta - Strongylocentrotidae
Strongylocentrotus ? purpuratus (Stimpson 1857)
original and current combination Echinus purpuratus
Anthozoa - Scleractinia - Dendrophylliidae
Balanophyllia elegans Verrill 1864
see common names

Geography
Country:United States State/province:California County:Ventura
Coordinates: 33.2° North, 119.5° West (view map)
Paleocoordinates:33.2° North, 119.2° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Quaternary
10 m.y. bin:Cenozoic 6
Key time interval:Quaternary
Age range of interval:2.58000 - 0.00000 m.y. ago
Stratigraphy
Formation:Unnamed
Local section:Army Camp Beach
Regional section:San Nicholas Island
Stratigraphic resolution:bed
Stratigraphy comments: Dune sand and fossiliferous marine terrace deposits of Quaternary age. These overlie Eocene strata. Fossils come from seven well-developed wave-cut platforms at altitudes of 25 to 990 feet. Several submerged terraces are present on the shelf adjacent to the island., the lowest being 400 ft below sea-level. Presumably all the terrace platforms on San Nicholas Island were cut later than the middle Pleistocene diastrophism recognized elsewhere in southern California. Terrace platforms are covered with a variety of sediments of marine and non-marine origin and range in thickness from a few inches to many feet.
Lithology and environment
Primary lithology:pebbly,shelly/skeletal conglomeratic,calcareous sandstone
Includes fossils?Y
Lithology description: Generally comprise poorly sorted calcareous sand and gravel composed primarily of mollusc shell fragments, echinoid plates and spines, calcareous algae, and bryozoans.
Environment:coastal indet.
Glacial or sequence phase:transgressive systems tract
Geology comments: Higher emergent terraces may represent wave-abraded platforms that were eroded during eustatic changes in sea level combined with tectonic uplift. The lowest emergent terrace may have been cut during eustatic sea-level changes followed by very slight regional seaward warping. Presumably all the terrace platforms on San Nicholas Island were cut later than the middle Pleistocene diastrophism recognized elsewhere in southern California
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some macrofossils,some microfossils
Collection methods:selective quarrying,field collection
Reason for describing collection:taxonomic analysis
Collection method comments: Collections made by Vedder et al (1955-1956). Earlier collections by Cooper (1894), and Howard (1955)
Taxonomic list comments:Comprehensive for invertebrates
Metadata
Also known as:Vedder & Norris (1963) SN-1
Database number:37933
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2004-03-27 12:15:20 Last modified:2013-11-25 13:37:23
Access level:the public Released:2004-03-27 12:15:20
Creative Commons license:CC BY
Reference information

Primary reference:
10107. J. G. Vedder and R. M. Norris. 1963. Geology of San Nicolas Island, California. United States Geological Survey Professional Paper 369:1-65 [A. Miller/A. Hendy/P. Wagner]

Secondary references:

63217 A. J. W. Hendy. 2020. Unpublished taxonomic backbone for Eastern Pacific Invertebrate Communities of the Cenozoic (EPICC) Thematic Collections Network. [A. Hendy/A. Hendy/A. Hendy]