San Nicholas Island (SN-13): Quaternary, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Ateles squamigerus
Anthozoa - Scleractinia - Dendrophylliidae
Balanophyllia elegans Verrill 1864
Thecostraca - Balanomorpha - Tetraclitidae
Tetraclita squamosa
Subspecies: Tetraclita squamosa rubescens
Thecostraca - Balanomorpha - Balanidae
Balanus cf. tintinnabulum Linnaeus 1758
recombined as Megabalanus tintinnabulum
Subspecies: Balanus cf. tintinnabulum californicus
Bivalvia - Mytilida - Mytilidae
Mytilus californianus Conrad 1837
Septifer bifurcatus (Conrad 1837)
Bivalvia - Pectinida - Pectinidae
Hinnites giganteus (Gray 1825)
recombined as Crassadoma gigantea
Bivalvia - Carditida - Carditidae
Glans subquadrata (Carpenter 1864)
synonym of Glans carpenteri
Bivalvia - Cardiida - Semelidae
Cumingia californica Conrad 1837
Bivalvia - Cardiida - Psammobiidae
Gari californica (Conrad 1849)
recombined as Gari (Gobraeus) californica
Bivalvia - Cardiida - Veneridae
Irus cf. lamellifer (Conrad 1837)
recombined as Irusella lamellifera
Ventricolaria fordii (Yates 1890)
recombined as Globivenus fordii
Petricola carditoides (Conrad 1837)
recombined as Petricola (Petricola) carditoides
Saxidomus nuttalli Conrad 1837
Transennella tantilla (Gould 1853)
recombined as Nutricola tantilla
Bivalvia - Lucinida - Lucinidae
Epilucina californica (Conrad 1837)
original and current combination Phacoides californicus
Gastropoda - Heterostropha - Pyramidellidae
Odostomia cf. oldroydi
Odostomia cf. tenuisculpta
Turbonilla raymondi
Gastropoda - Heterostropha - Trimusculidae
Trimusculus reticulatus (Sowerby 1835)
recombined as Trimusculus reticulata
Gastropoda - Neotaenioglossa - Calyptraeidae
Crepidula adunca Sowerby 1824
Crepidula cf. perforans Valenciennes 1846
Crepidula excavata (Broderip 1834)
Crepipatella lingulata (Gould 1846)
Gastropoda - Procerithiidae
Bittium cf. attenuatum Carpenter 1864
recombined as Lirobittium attenuatum
Bittium cf. armillatum Carpenter 1864
recombined as Lirobittium armillatum
Gastropoda - Caecidae
Fartulum occidentale Bartsch 1920
synonym of Fartulum dextroversum
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 tumens (Carpenter 1864)
Hipponix antiquatus (Linnaeus 1767)
    = Antisabia panamensis Adams 1852
Hendy 2020
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 - Barleeiidae
Barleeia cf. oldroydi Bartsch 1920
Barleeia subtenuis Carpenter 1864
Gastropoda - Rissoidae
"Rissoina" cf. aequisculpta (Keep 1887)
recombined as Alvinia aequisculpta
Alvania purpurea Dall 1871
recombined as Alvinia purpurea
Gastropoda - Neogastropoda - Muricidae
Ocenebra cf. subangulata (Stearns 1873)
recombined as Urosalpinx subangulata
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 - Pseudomelatomidae
Pseudomelatoma ? torosa (Gabb 1864)
Gastropoda - Neogastropoda - Mangeliidae
Mangelia interfossa Carpenter 1864
recombined as Perimangelia interfossa
Mangelia variegata Carpenter 1864
recombined as Tenaturris variegata
Gastropoda - Neogastropoda - Columbellidae
Amphissa versicolor Dall 1871
Mitrella carinata (Hinds 1844)
recombined as Alia carinata
Gastropoda - Neogastropoda
Mitromorpha gracilior (Tryon 1884)
recombined as Cymakra gracilior
Gastropoda - Neogastropoda - Mitridae
Mitra idae Melville 1893
recombined as Mitra (Atrimitra) idae
Gastropoda - Triviidae
Pusula californiana (Gray 1827)
recombined as Pseudopusula californiana
Gastropoda - Cypraeidae
Zonaria spadicea (Swainson 1823)
recombined as Neobernaya spadicea
Gastropoda - Vermetidae
Spiroglyphus lituellus (Morch 1861)
recombined as Dendropoma lituella
Petaloconchus complicatus Dall 1908
Gastropoda - Naticidae
Lunatia cf. lewisii (Gould 1847)
recombined as Euspira lewisii
Gastropoda - Cerithiopsidae
Seila montereyense
Cerithiopsis sp. Hanley 1849
Gastropoda - Triphoridae
Triphora cf. pedroana (Bartsch 1907)
recombined as Monophorus pedroanus
Gastropoda - Trochidae
Pupillaria cf. optabilis (Carpenter 1864)
recombined as Lirularia optabilis
Tegula brunnea (Philippi 1849)
recombined as Chlorostoma brunnea
Tegula cf. aureotincta (Forbes 1852)
recombined as Chlorostoma aureotincta
Tegula funebralis (Adams 1855)
original and current combination Chlorostoma funebrale
Calliostoma ligatum (Gould 1849)
recombined as Calliostoma ligatus
Norrisia norrisii (Sowerby I 1838)
Gastropoda - Turbinidae
Homalopoma ? paucicostatum (Dall 1871)
recombined as Homalopoma (Homalopoma) paucicostatum
Homalopoma carpenteri (Pilsbry 1889)
synonym of Homalopoma (Homalopoma) luridum
Gastropoda - Phasianellidae
Tricolia cf. pulloides (Carpenter 1865)
recombined as Eulithidium pulloides
Gastropoda - Lepetellida - Haliotidae
Haliotis cracherodii Leach 1814
Haliotis rufescens Swainson 1822
Gastropoda - Lepetellida - Fissurellidae
Diodora aspera (Rathke 1833)
Megathura crenulata (Sowerby 1825)
Fissurella volcano Reeve 1849
Gastropoda - Patellida - Lottiidae
Acmaea pelta Eschscholtz 1833
recombined as Lottia pelta
Lottia gigantea Sowerby 1834
Acmaea scabra (Gould 1846)
original and current combination Patella (Lottia) scabra
Acmaea cf. 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
Polyplacophora - Neoloricata - Ischnochitonidae
Tonicella cf. lineata (Wood 1815)
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:Dutch Harbor
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 (1956). Earlier collections by Cooper (1894), and Howard (1955)
Taxonomic list comments:Comprehensive for invertebrates
Metadata
Also known as:Vedder & Norris (1963) SN-13
Database number:37937
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2004-03-27 12:56:03 Last modified:2013-11-25 13:37:23
Access level:the public Released:2004-03-27 12:56:03
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]