San Nicholas Island (SN-2): Quaternary, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Ateles squamigerus
Anthozoa - Scleractinia - Dendrophylliidae
Balanophyllia elegans Verrill 1864
Echinoidea - Camarodonta - Strongylocentrotidae
Strongylocentrotus cf. franciscanus (Agassiz 1863)
original and current combination Toxocidaris franciscana
Polyplacophora - Neoloricata - Mopaliidae
Mopalia cf. muscosa (Gould 1846)
Bivalvia - Mytilida - Mytilidae
Mytilus californianus Conrad 1837
Bivalvia - Arcida - Glycymerididae
Glycymeris subobsoleta (Carpenter 1864)
synonym of Glycymeris septentrionalis
Bivalvia - Pectinida - Pectinidae
Hinnites giganteus (Gray 1825)
recombined as Crassadoma gigantea
Chlamys hastatus (Sowerby 1842)
recombined as Chlamys hastata
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 - Pholadida - Pholadidae
Penitella ? penita (Conrad 1837)
Bivalvia - Cardiida - Lasaeidae
Kellia laperousii (Deshayes 1839)
original and current combination Chironia laperousii
Lasaea cf. cistula Keen 1938
synonym of Lasaea adansoni
Bivalvia - Cardiida - Cardiidae
Trachycardium ? quadragenarium (Conrad 1837)
recombined as Dallocardia quadragenarium
Bivalvia - Cardiida - Semelidae
Cumingia californica Conrad 1837
Bivalvia - Cardiida - Psammobiidae
Gari cf. californica (Conrad 1849)
recombined as Gari (Gobraeus) californica
Bivalvia - Cardiida - Veneridae
Irus lamellifer (Conrad 1837)
recombined as Irusella lamellifera
Protothaca cf. staminea (Conrad 1837)
recombined as Leukoma staminea
Humilaria cf. perlaminosa (Conrad 1855)
Transennella tantilla (Gould 1853)
recombined as Nutricola tantilla
Saxidomus nuttalli Conrad 1837
Petricola carditoides (Conrad 1837)
recombined as Petricola (Petricola) carditoides
Bivalvia - Cardiida - Chamidae
Chama pellucida Broderip 1835
    = Chama arcana Bernard 1976
Coan et al. 2000
Bivalvia - Thraciida - Thraciidae
Thracia curta Conrad 1837
recombined as Thracia (Ixartia) curta
Gastropoda - Lepetellida - Fissurellidae
Diodora aspera (Rathke 1833)
Gastropoda - Lepetellida - Haliotidae
Haliotis cf. rufescens Swainson 1822
Haliotis cracherodii Leach 1814
Gastropoda - Turbinidae
Astraea gibberosa (Dillwyn 1817)
recombined as Pomaulax gibberosa
Homalopoma cf. carpenteri (Pilsbry 1889)
synonym of Homalopoma (Homalopoma) luridum
Gastropoda - Trochidae
Tegula funebralis (Adams 1855)
original and current combination Chlorostoma funebrale
Tegula brunnea (Philippi 1849)
recombined as Chlorostoma brunnea
Pupillaria cf. optabilis (Carpenter 1864)
recombined as Lirularia optabilis
Pupillaria cf. parcipicta (Carpenter 1864)
recombined as Lirularia parcipicta
Gastropoda - Phasianellidae
Tricolia cf. pulloides (Carpenter 1865)
recombined as Eulithidium pulloides
Gastropoda - Heterostropha - Trimusculidae
Trimusculus reticulatus (Sowerby 1835)
recombined as Trimusculus reticulata
Gastropoda - Patellida - Lottiidae
Acmaea digitalis Eschscholtz 1833
recombined as Lottia digitalis
Acmaea scutum Eschscholtz 1833
recombined as Lottia scutum
Acmaea scabra (Gould 1846)
original and current combination Patella (Lottia) scabra
Acmaea sp. n. sp. Eschscholtz 1830
Acmaea mitra Eschscholtz 1833
Gastropoda
Daphnella cf. fuscoligata Dall 1871
recombined as Clathromangelia fuscoligata
Gastropoda - Eulimidae
Balcis cf. prefalcata Bartsch 1917
synonym of Vitreolina macra
Gastropoda - Cerithiidae
Bittium eschrichtii (Middendorff 1849)
recombined as Neostylidium eschrichtii
Subspecies: Bittium eschrichtii montereyense
Gastropoda - Procerithiidae
Bittium ? armillatum Carpenter 1864
recombined as Lirobittium armillatum
Gastropoda - Littorinidae
Lacuna cf. carinata Gould 1848
recombined as Lacuna (Epheria) carinata
Lacuna ? unifasciata Carpenter 1857
recombined as Lacuna (Epheria) unifasciata
Littorina planaxis Philippi 1847
replaced by Littorina (Neritrema) keenae
Gastropoda - Hipponicidae
Hipponix antiquatus (Linnaeus 1767)
    = Antisabia panamensis Adams 1852
Hendy 2020
Gastropoda - Rissoidae
Rissoina cf. hannai
"Rissoina" aequisculpta (Keep 1887)
recombined as Alvinia aequisculpta
Alvania cf. acutelirata (Carpenter 1864)
synonym of Actonia compacta
Rissoina aff. dalli Bartsch 1915
recombined as Zebina dalli
Gastropoda - Barleeiidae
Barleeia cf. oldroydi Bartsch 1920
Barleeia cf. subtenuis Carpenter 1864
"Diala" marmorea Carpenter 1864
synonym of Pseudodiala acuta
Gastropoda - Elachisinidae
Elachisina grippi
Gastropoda - Vitrinellidae
Vitrinella cf. oldroydi Bartsch 1907
Gastropoda - Caecidae
Caecum dalli Bartsch 1920
synonym of Caecum quadratum
Caecum californicum Dall 1885
Gastropoda - Vermetidae
Spiroglyphus lituellus (Morch 1861)
recombined as Dendropoma lituella
Petaloconchus anellum
Petaloconchus complicatus Dall 1908
Gastropoda - Neogastropoda - Mitridae
Mitra idae Melville 1893
recombined as Mitra (Atrimitra) idae
Gastropoda - Neogastropoda - Columbellidae
Mitrella carinata (Hinds 1844)
recombined as Alia carinata
Amphissa ? versicolor Dall 1871
Gastropoda - Neogastropoda - Buccinidae
"Searlesia" dira Reeve 1846
Gastropoda - Neogastropoda - Siphonaliidae
Calicantharus fortis (Carpenter 1866)
Gastropoda - Neogastropoda - Fasciolariidae
Barbarofusus cf. harfordi
Barbarofusus monksae
Barbarofusus ? kobelti (Dall 1877)
Gastropoda - Neogastropoda - Olividae
Olivella biplicata (Sowerby 1825)
recombined as Callianax biplicata
Gastropoda - Neogastropoda - Turridae
Ophiodermella ophioderma
Gastropoda - Neogastropoda - Mitromorphidae
Mitromorpha cf. filosa (Carpenter 1864)
replaced by Mitromorpha carpenteri
Gastropoda - Neogastropoda - Conidae
Conus cf. californicus Reeve 1844
recombined as Californiconus californicus
Gastropoda - Neogastropoda - Cystiscidae
Gibberulina pyriformis (Carpenter 1864)
synonym of Granulina margaritula
Gastropoda - Neogastropoda - Muricidae
Ocenebra cf. interfossa (Carpenter 1864)
recombined as Paciocinebrina interfossa
Ocenebra cf. lurida (Middendorff 1848)
recombined as Paciocinebrina lurida
Ceratostoma cf. foliatum (Gmelin 1791)
Gastropoda - Neotaenioglossa - Calyptraeidae
Crepidula onyx Sowerby 1824
Crepidula adunca Sowerby 1824
Thecostraca - Balanomorpha - Balanidae
Balanus nubilis
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:730 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:Hill 818
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-2
Database number:37948
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2004-03-27 13:12:55 Last modified:2013-11-25 13:37:23
Access level:the public Released:2004-03-27 13:12:55
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:

18663 E. V. Coan, P. V. Scott, and F. R. Bernard. 2000. Bivalve seashells of western North America. Santa Barbara Museum of Natural history Monographs 2:1-764 [A. Miller/A. Hendy/M. Uhen]
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]