San Nicholas Island (SN-11): Quaternary, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Ateles squamigerus
Cysticus cf. jewettii
Denatlium semipolitum
Anthozoa - Scleractinia - Dendrophylliidae
Balanophyllia elegans Verrill 1864
Thecostraca - Balanomorpha - Tetraclitidae
Tetraclita ? squamosa
Subspecies: Tetraclita squamosa rubescens
Bivalvia - Mytilida - Mytilidae
Modiolus cf. fornicatus (Carpenter 1864)
replaced by Modiolus carpenteri
Mytilus californianus Conrad 1837
Septifer bifurcatus (Conrad 1837)
Bivalvia - Carditida - Carditidae
Glans subquadrata (Carpenter 1864)
synonym of Glans carpenteri
Bivalvia - Cardiida - Semelidae
Cumingia californica Conrad 1837
Bivalvia - Cardiida - Veneridae
Irus cf. lamellifer (Conrad 1837)
recombined as Irusella lamellifera
Protothaca staminea (Conrad 1837)
recombined as Leukoma staminea
Ventricolaria fordii (Yates 1890)
recombined as Globivenus fordii
Transennella tantilla (Gould 1853)
recombined as Nutricola tantilla
Bivalvia - Cardiida - Lasaeidae
Lasaea cf. cistula Keen 1938
synonym of Lasaea adansoni
Bivalvia - Cardiida - Neoleptonidae
Bernardina bakeri Dall 1910
Bivalvia - Lucinida - Lucinidae
Epilucina californica (Conrad 1837)
original and current combination Phacoides californicus
Gastropoda - Opisthobranchia - Cylichnidae
Coleophysis ? harpa (Dall 1871)
recombined as Acteocina harpa
Gastropoda - Siphonariidae
"Siphonaria" brannani
Gastropoda - Heterostropha - Pyramidellidae
Odostomia aff. americana
Gastropoda - Heterostropha - Trimusculidae
Trimusculus reticulatus (Sowerby 1835)
recombined as Trimusculus reticulata
Gastropoda - Neotaenioglossa - Calyptraeidae
Crepidula adunca Sowerby 1824
Crepidula onyx Sowerby 1824
Crepipatella lingulata (Gould 1846)
Gastropoda - Procerithiidae
Bittium attenuatum Carpenter 1864
recombined as Lirobittium attenuatum
Bittium armillatum Carpenter 1864
recombined as Lirobittium armillatum
Gastropoda - Caecidae
Fartulum cf. orcutti (Dall in Orcutt 1885)
Caecum sp. Fleming 1813
Caecum dalli Bartsch 1920
synonym of Caecum quadratum
Caecum californicum Dall 1885
Gastropoda - Vitrinellidae
Vitrinella cf. oldroydi Bartsch 1907
Gastropoda - Hipponicidae
Hipponix antiquatus (Linnaeus 1767)
    = Antisabia panamensis Adams 1852
Hendy 2020
Gastropoda - Littorinidae
Lacuna unifasciata Carpenter 1857
recombined as Lacuna (Epheria) unifasciata
Littorina cf. scutulata Gould 1849
recombined as Littorina (Littorina) scutulata
Littorina planaxis Philippi 1847
replaced by Littorina (Neritrema) keenae
Gastropoda - Barleeiidae
Barleeia cf. oldroydi Bartsch 1920
Barleeia subtenuis Carpenter 1864
Amphithalamus cf. tenuis Bartsch 1911
Amphithalamus inclusus Lozouet 1998
Gastropoda - Rissoidae
Alvania almo
Alvania cf. oldroydi
"Rissoina" aequisculpta (Keep 1887)
recombined as Alvinia aequisculpta
Alvania purpurea Dall 1871
recombined as Alvinia purpurea
Gastropoda - Neogastropoda - Muricidae
Acanthina cf. lugubris (Sowerby I 1822)
recombined as Mexacanthina lugubris
Acanthina cf. punctulata (Sowerby I 1835)
recombined as Acanthinucella punctulata
Ocenebra cf. foveolata (Hinds 1844)
recombined as Paciocinebrina foveolata
Ocenebra cf. interfossa (Carpenter 1864)
recombined as Paciocinebrina interfossa
Gastropoda - Neogastropoda
Barbarofusus ? arnoldi (Cossmann 1903)
recombined as Harfordia arnoldi
Gastropoda - Neogastropoda - Olividae
Olivella biplicata (Sowerby 1825)
recombined as Callianax biplicata
Gastropoda - Neogastropoda - Conidae
Conus californicus Reeve 1844
recombined as Californiconus californicus
Gastropoda - Neogastropoda - Mangeliidae
Mangelia ? interfossa Carpenter 1864
recombined as Perimangelia interfossa
Mangelia cf. variegata Carpenter 1864
recombined as Tenaturris variegata
? Cytharella sp. Monterosato 1875
Mangelia cf. nitens
corrected as Cythara (Mangelia)
Gastropoda - Neogastropoda - Columbellidae
Amphissa versicolor Dall 1871
Mitrella cf. tuberosa (Carpenter 1864)
Gastropoda - Neogastropoda - Siphonaliidae
Calicantharus fortis (Carpenter 1866)
Gastropoda - Neogastropoda
Mitromorpha cf. gracilior (Tryon 1884)
recombined as Cymakra gracilior
Gastropoda - Neogastropoda - Pseudolividae
Macron cf. lividus (Adams 1855)
Gastropoda - Neogastropoda - Mitridae
Mitra idae Melville 1893
recombined as Mitra (Atrimitra) idae
Gastropoda - Triviidae
Pusula californiana (Gray 1827)
recombined as Pseudopusula californiana
Gastropoda - Vermetidae
Spiroglyphus lituellus (Morch 1861)
recombined as Dendropoma lituella
Petaloconchus complicatus Dall 1908
Gastropoda - Cerithiopsidae
Cerithiopsis sp. Hanley 1849
Gastropoda - Eulimidae
Balcis thersites (Carpenter 1864)
recombined as Melanella thersites
Gastropoda - Trochidae
Pupillaria cf. optabilis (Carpenter 1864)
recombined as Lirularia optabilis
Tegula brunnea (Philippi 1849)
recombined as Chlorostoma brunnea
Tegula funebralis (Adams 1855)
original and current combination Chlorostoma funebrale
Tegula gallina (Forbes 1850)
recombined as Chlorostoma gallina
Subspecies: Tegula gallina multifilosa
Gastropoda - Turbinidae
Homalopoma cf. baculum (Carpenter 1864)
Homalopoma carpenteri (Pilsbry 1889)
synonym of Homalopoma (Homalopoma) luridum
Astraea cf. gibberosa (Dillwyn 1817)
recombined as Pomaulax gibberosa
Gastropoda - Phasianellidae
Tricolia pulloides (Carpenter 1865)
recombined as Eulithidium pulloides
Gastropoda - Lepetellida - Haliotidae
Haliotis cf. cracherodii Leach 1814
Haliotis ? rufescens Swainson 1822
Gastropoda - Lepetellida - Fissurellidae
Diodora aspera (Rathke 1833)
Fissurella volcano Reeve 1849
Megatebennus bimaculatus (Dall 1871)
recombined as Fissurellidea bimaculata
Puncturella cf. cooperi Carpenter 1864
Gastropoda - Patellida - Lottiidae
Acmaea cf. pelta Eschscholtz 1833
recombined as Lottia pelta
Acmaea asmi (Middendorff 1847)
recombined as Lottia asmi
Acmaea scabra (Gould 1846)
original and current combination Patella (Lottia) scabra
Acmaea ? limatula (Carpenter 1864)
original and current combination Patella limatula
Acmaea digitalis Eschscholtz 1833
recombined as Lottia digitalis
Acmaea insessa (Hinds 1842)
recombined as Lottia insessa
Acmaea mitra Eschscholtz 1833
Polyplacophora - Chitonida - Callistoplacidae
Callistochiton crassicostatus Pilsbry 1893
Polyplacophora - Neoloricata - Acanthochitonidae
"Cryptochiton" stelleri (Middendorf 1847)
Polyplacophora - Neoloricata - Mopaliidae
Mopalia cf. muscosa (Gould 1846)
Echinoidea - Camarodonta - Strongylocentrotidae
Strongylocentrotus ? purpuratus (Stimpson 1857)
original and current combination Echinus purpuratus
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
Key time interval:Quaternary
Age range of interval:2.58800 - 0.00000 m.y. ago
Stratigraphy
Formation:Unnamed
Local section:Celery Creek
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:general faunal/floral 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-11
Database number:37939
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2004-03-27 12:59:21 Last modified:2013-11-25 13:37:23
Access level:the public Released:2004-03-27 12:59:21
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]