San Nicholas Island (SN-7): Quaternary, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa - Scleractinia - Dendrophylliidae
Balanophyllia elegans Verrill 1864
Echinoidea - Camarodonta - Strongylocentrotidae
Strongylocentrotus cf. franciscanus (Agassiz 1863)
original and current combination Toxocidaris franciscana
Polyplacophora - Neoloricata - Acanthochitonidae
"Cryptochiton" stelleri (Middendorf 1847)
Gastropoda - Patellida - Lottiidae
Acmaea mitra Eschscholtz 1833
Acmaea cf. limatula (Carpenter 1864)
original and current combination Patella limatula
Acmaea pelta Eschscholtz 1833
recombined as Lottia pelta
Acmaea digitalis Eschscholtz 1833
recombined as Lottia digitalis
Lottia gigantea Sowerby 1834
Acmaea cf. scabra (Gould 1846)
original and current combination Patella (Lottia) scabra
Acmaea scutum Eschscholtz 1833
recombined as Lottia scutum
Gastropoda - Turbinidae
Homalopoma cf. carpenteri (Pilsbry 1889)
synonym of Homalopoma (Homalopoma) luridum
Gastropoda - Phasianellidae
Tricolia cf. pulloides (Carpenter 1865)
recombined as Eulithidium pulloides
Gastropoda - Trochidae
Tegula funebralis (Adams 1855)
original and current combination Chlorostoma funebrale
Gastropoda - Lepetellida - Fissurellidae
Diodora cf. callomarginata
Diodora aspera (Rathke 1833)
Gastropoda - Lepetellida - Haliotidae
Haliotis cf. cracherodii Leach 1814
Gastropoda - Neotaenioglossa - Calyptraeidae
Crepidula onyx Sowerby 1824
Crepidula adunca Sowerby 1824
Crepidula aculeata (Gmelin 1791)
    = Bostrycapulus decorus Collin 2019
Hendy 2020
Crucibulum spinosum Conrad 1855
Gastropoda - Epitoniidae
Epitonium cf. indianorum (Carpenter 1864)
Opalia cf. evicta
Gastropoda - Rissoidae
Alvania purpurea Dall 1871
recombined as Alvinia purpurea
Gastropoda - Barleeiidae
Amphithalamus tenuis Bartsch 1911
Barleeia cf. oldroydi Bartsch 1920
Barleeia cf. subtenuis Carpenter 1864
Gastropoda - Vermetidae
Petaloconchus anellum
Petaloconchus complicatus Dall 1908
Spiroglyphus lituellus (Morch 1861)
recombined as Dendropoma lituella
Gastropoda - Hipponicidae
Hipponix antiquatus (Linnaeus 1767)
    = Antisabia panamensis Adams 1852
Hendy 2020
Gastropoda - Neogastropoda - Pseudolividae
Macron lividus (Adams 1855)
Gastropoda - Neogastropoda - Buccinidae
"Searlesia" cf. dira Reeve 1846
Gastropoda - Neogastropoda - Siphonaliidae
Calicantharus cf. fortis (Carpenter 1866)
Gastropoda - Neogastropoda - Columbellidae
Amphissa versicolor Dall 1871
Mitrella tuberosa (Carpenter 1864)
Mitrella carinata (Hinds 1844)
recombined as Alia carinata
Gastropoda - Vitrinellidae
Vitrinella cf. oldroydi Bartsch 1907
Gastropoda - Caecidae
Caecum cf. californicum Dall 1885
Caecum dalli Bartsch 1920
synonym of Caecum quadratum
Fartulum occidentale Bartsch 1920
synonym of Fartulum dextroversum
Fartulum cf. orcutti (Dall in Orcutt 1885)
Gastropoda - Littorinidae
Littorina scutulata Gould 1849
recombined as Littorina (Littorina) scutulata
Gastropoda - Procerithiidae
Bittium cf. attenuatum Carpenter 1864
recombined as Lirobittium attenuatum
Bittium armillatum Carpenter 1864
recombined as Lirobittium armillatum
Gastropoda - Heterostropha - Trimusculidae
Trimusculus reticulatus (Sowerby 1835)
recombined as Trimusculus reticulata
Bivalvia - Carditida - Carditidae
Glans subquadrata (Carpenter 1864)
synonym of Glans carpenteri
Bivalvia - Lucinida - Lucinidae
Epilucina californica (Conrad 1837)
original and current combination Phacoides californicus
Bivalvia - Cardiida - Veneridae
Transennella tantilla (Gould 1853)
recombined as Nutricola tantilla
Petricola carditoides (Conrad 1837)
recombined as Petricola (Petricola) carditoides
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 - Mytilida - Mytilidae
Mytilus ? californianus Conrad 1837
Bivalvia - Pectinida - Pectinidae
Hinnites giganteus (Gray 1825)
recombined as Crassadoma gigantea
Thecostraca - Balanomorpha - Tetraclitidae
Tetraclita ? squamosa
Subspecies: Tetraclita squamosa rubescens
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
Altitude:665 feet
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:San Nicholas Island
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-7
Database number:37943
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2004-03-27 13:07:12 Last modified:2013-11-25 13:37:23
Access level:the public Released:2004-03-27 13:07:12
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]