Checklist for Class Arachnida Lamarck, 1801 (Arachnids)
and region Contra Costa County (California, USA)
List of families for Contra Costa County
56 Families width 122 Species and 1 Subspecies #AELPHCDTJMGSOIFZNVR
| Araneidae (Simon, 1895) | Golden orb web spiders | 13 | Species | Taxom | | Eriophyidae Nalepa, 1898 | Blister mites | 2 | Species | Taxom | | Linyphiidae Blackwall, 1859 | Dwarf spiders | 5 | Species | Taxom | | Alloptidae Gaud, 1957 | | 1 | Species | Taxom | | Lycosidae Lehtinen & H..., 1979 | Ground Spiders | 4 | Species | Taxom | | Phytoseiidae Berlese, 1916 | Phytoseiid mites | 3 | Species | Taxom | | Harpirhynchidae Dubinin, 1957 | | 2 | Species | Taxom | | Anyphaenidae Bertkau, 1878 | Anyphaenid sac spiders | 1 | Species | Taxom | | Corinnidae Karsch, 1880 | Ant-like Sac Spiders | 3 | Species | Taxom | | Dictynidae O. P-Cambridge, 1871 | Dictynid spiders | 3 | Species | Taxom | | Ascidae Oudemans, 1905 | | 0 | Species | Taxom | | Tenuipalpidae Berlese, 1913 | False spider mites | 3 | Species | Taxom | | Tetranychidae Donnadieu, 1875 | Spider mites | 9 | Species | Taxom | | Phalangodidae Simon, 1879 | | 1 | Species | Taxom | | Amaurobiidae Thorell, 1870 | Amaurobiids | 1 | Species | Taxom | | Carabodidae Koch, 1837 | | 1 | Species | Taxom | | Johnstonianidae Thor, 1935 | | 1 | Species | Taxom | | Miturgidae Simon, 1885 | Long-legged sac spiders | 1 | Species | Taxom | | Cheyletidae Leach, 1815 | | 0 | Species | Taxom | | Amblyommidae (Banks, 1907) | | 4 | Species | Taxom | | Theridiidae Sundevall, 1833 | Cobweb And Widow Spiders | 6 | Species | Taxom | | Gnaphosidae Pocock, 1898 | Flat-bellied ground spiders | 10 | Species | Taxom | | Dysderidae C. L. Koch, 1837 | Dysderid spiders | 2 | Species | Taxom | | Cheliferidae Risso, 1826 | | 1 | Species | Taxom | | Eremobatidae Kraepelin, 1899 | | 1 | Species | Taxom | | Stigmaeidae Wood, 1967 | | 0 | Species | Taxom | | Ologamasidae Ryke, 1962 | | 1 | Species | Taxom | | Geogarypidae Chamberlin, 1930 | | 1 | Species | Taxom | | Salticidae Blackwall, 1842 | Jumping Spider | 6 | Species | Taxom | | Ixodidae C. L. Koch, 1844 | Hard Tick | 6 | Species | Taxom | | Laelapidae Berlese, 1892 | | 1 | Species | Taxom | | Sparassidae (Bertkau, 1872) | Giant crab spiders | 1 | Species | Taxom | | Ereynetidae Schrank, 1776 | | 1 | Species | Taxom | | Filistatidae Ausserer, 1867 | Crevice weaver | 1 | Species | Taxom | | Sclerosomatidae Simon, 1879 | Sclerosomatid Harvestmen | 1 | Species | Taxom | | Zerconidae Berlese, 1892 | | 0 | Species | Taxom | | Thomisidae Sundevall, 1833 | Crab Spider | 4 | Species | Taxom | | Mecicobothriidae Holmberg, 1882 | Dwarf tarantula | 1 | Species | Taxom | | Neobisiidae Chamberlin, 1930 | | 1 | Species | Taxom | | Camerobiidae Southcott, 1957 | Stilt-legged mites | 0 | Species | Taxom | | Nemastomatidae Simon, 1872 | | 1 | Species | Taxom | | Argasidae C. L. Koch, 1844 | Soft tick | 1 | Species | Taxom | | Oxyopidae Thorell, 1870 | Lynx spiders | 3 | Species | Taxom | | Vaejovidae Thorell, 1876 | | 2 | Species | Taxom | | Parasitidae Oudemans, 1901 | Beetle Mites | 0 | Species | Taxom | | Phalangiidae Latreille, 1802 | Daddy-Long-Legs | 1 | Species | Taxom | | Pholcidae (C. L. Koch, 1851) | Carpenter spider | 2 | Species | Taxom | | Raphignathidae Kramer, 1877 | | 0 | Species | Taxom | | Philodromidae (Thorell, 1870) | False crab spiders | 2 | Species | Taxom | | Halolaelapidae (Karg, 1965) | | 0 | Species | Taxom | | Segestriidae Simon, 1893 | Six-eyed Spiders | 1 | Species | Taxom | | Tengellidae Dahl, 1908 | Tengellid spiders | 1 | Species | Taxom | | Syringophilidae Lavoipierre, 1953 | Quill mites | 1 | Species | Taxom | | Garypidae Simon, 1879 | | 1 | Species | Taxom | | Tarsonemidae Kramer, 1877 | Tarsonemid mites | 1 | Species | Taxom | | Tetragnathidae Menge, 1866 | Elongated Orb Weavers | 2 | Species | Taxom |
Genera for Contra Costa County
112 Genera with 122 Species #ABCDEGHIKLMNOPRSTUXZ
| Aculepeira Chamberlin &..., 1875 | | 1 | Species | Taxom | | Aculops Keifer, 1972 | | 1 | Species | Taxom | | Aculus Keifer, 1938 | | 1 | Species | Taxom | | Agyneta Hull, 1919 | | 1 | Species | Taxom | | Alloptes Canestrini, 1976 | | 1 | Species | Taxom | | Alopecosa Simon, 1758 | Fox spiders | 1 | Species | Taxom | Amblyseius Berlese, 1915 | | 0 | Species | Taxom | | Anharpyrhynchus Fain, 1954 | | 1 | Species | Taxom | | Anyphaena Sundevall, 1896 | | 1 | Species | Taxom | | Apochinomma Pavesi, 1896 | | 1 | Species | Taxom | | Araneus Clerck, 1847 | Angulate & roundshouldered orbweavers | 4 | Species | Taxom | | Archaeodictyna Caporiacco, 1871 | | 1 | Species | Taxom | Arctoseius Thor, 1930 | | 0 | Species | Taxom | | Argiope Audouin, 1833 | Garden orbweavers | 1 | Species | Taxom | | Blabomma Chamberlin &..., 1895 | | 1 | Species | Taxom | | Brevipalpus Donnadieu, 1949 | | 2 | Species | Taxom | | Bryobia Koch, 1835 | | 1 | Species | Taxom | | Calicina Ubick & Briggs, 1966 | | 1 | Species | Taxom | | Callobius Chamberlin, 1884 | Hacklemesh Weaver | 1 | Species | Taxom | | Carabodes Koch, 1914 | | 1 | Species | Taxom | | Castianeira Keyserling, 1847 | Ant-Mimic Sac Spiders | 1 | Species | Taxom | | Centrotrombidium Kramer, 1957 | | 1 | Species | Taxom | | Cheiracanthium C. L. Koch, 1847 | Longlegged sac spiders | 1 | Species | Taxom | Cheletomimus Oudemans, 1904 | | 0 | Species | Taxom | | Cyclosa Menge, 1772 | Three-lobed Spiders | 1 | Species | Taxom | | Dermacentor Koch, 1821 | Dog Ticks | 3 | Species | Taxom | | Dipoena Thorell, 1882 | | 1 | Species | Taxom | | Drassyllus Chamberlin, 1922 | | 2 | Species | Taxom | | Dysdera Latreille, 2001 | | 2 | Species | Taxom | | Ellingsenius J. C. Chambe..., 1903 | | 1 | Species | Taxom | | Eremobates Banks, 1941 | | 1 | Species | Taxom | Eustigmaeus Berlese, 1910 | | 0 | Species | Taxom | | Galendromus Muma, 1951 | | 1 | Species | Taxom | | Gamasiphis Berlese, 1913 | | 1 | Species | Taxom | | Geogarypus J. C. Chambe..., 1981 | | 1 | Species | Taxom | | Gnaphosa Latreille, 1872 | | 2 | Species | Taxom | | Habronattus F. O. P.-Cam..., 1901 | Paradise Spiders | 2 | Species | Taxom | | Haemaphysalis Koch, 1869 | | 1 | Species | Taxom | | Haemogamasus Berlese, 1903 | | 1 | Species | Taxom | | Harpirhynchus Megnin, 1911 | | 1 | Species | Taxom | | Heteropoda Latreille, 1767 | | 1 | Species | Taxom | | Hydranetes Kethley, 1971 | | 1 | Species | Taxom | Hypoaspis Canestrini, 1884 | Predatory mite | 0 | Species | Taxom | | Incestophantes Tanasevitch, 1990 | | 1 | Species | Taxom | | Ixodes Latreille, 1911 | | 5 | Species | Taxom | | Kukulcania Lehtinen, 1935 | | 1 | Species | Taxom | | Larinioides Caporiacco, 1758 | Furrow spiders | 1 | Species | Taxom | | Lathys Simon, 1944 | | 1 | Species | Taxom | | Latrodectus Walckenaer, 1775 | Black widow spider | 2 | Species | Taxom | | Leuronychus Banks, 1894 | | 1 | Species | Taxom | Macrozercon Blaszak, 1975 | | 0 | Species | Taxom | | Mangora O. P.-Cambridge, 1847 | | 1 | Species | Taxom | | Mastophora Holmberg, 1850 | Angling spiders | 1 | Species | Taxom | | Mecaphesa Simon, 1877 | | 2 | Species | Taxom | | Megahexura Kaston, 1919 | | 1 | Species | Taxom | | Melychiopharis Simon, 1895 | | 1 | Species | Taxom | | Microbisium Chamberlin, 1895 | | 1 | Species | Taxom | | Misumena Latreille, 1758 | Flower crab spiders | 1 | Species | Taxom | Mixozercon Halašková, 1963 | | 0 | Species | Taxom | | Monoceronychus McGregor, 1945 | | 1 | Species | Taxom | | Myrmarachne MacLeay, 1980 | Antmimicking spider | 1 | Species | Taxom | Neophyllobius Berlese, 1886 | | 0 | Species | Taxom | | Neoscona Simon, 1864 | Spotted orbweavers | 1 | Species | Taxom | | Neoseiulus Hughes, 1948 | | 1 | Species | Taxom | | Neriene Blackwall, 1886 | | 2 | Species | Taxom | | Nodocion Chamberlin, 1919 | | 1 | Species | Taxom | | Oligonychus Berlese, 1950 | | 3 | Species | Taxom | | Ortholasma Banks, 1894 | | 1 | Species | Taxom | | Otobius Banks, 1884 | | 1 | Species | Taxom | | Oxyopes Latreille, 1845 | Lynx Spiders | 2 | Species | Taxom | | Panonychus Yokoyama, 1916 | | 1 | Species | Taxom | | Pardosa C. L. Koch, 1885 | Thin-legged Wolf Spider | 1 | Species | Taxom | | Paruroctonus Werner, 1982 | | 1 | Species | Taxom | | Pelegrina Franganillo, 1892 | White-Cheeked Jumping Spiders | 1 | Species | Taxom | Pergamasus Berlese, 1903 | | 0 | Species | Taxom | | Peucetia Thorell, 1832 | | 1 | Species | Taxom | | Phalangium Linnaeus, 1761 | | 1 | Species | Taxom | | Phidippus C. L. Koch, 1883 | | 1 | Species | Taxom | | Pholcophora Banks, 1896 | | 1 | Species | Taxom | | Pholcus Walckenaer, 1775 | | 1 | Species | Taxom | | Phytoseius Ribaga, 1962 | | 1 | Species | Taxom | | Pirata Sundevall, 1757 | Pirate wolf spiders | 1 | Species | Taxom | | Pityohyphantes Simon, 1943 | Hammock Spiders | 1 | Species | Taxom | | Platytetranychus Oudemans, 1936 | | 1 | Species | Taxom | | Poecilopachys Simon, 1833 | | 1 | Species | Taxom | Protolophus Banks, 1893 | | 0 | Species | Taxom | Raphignathus Dugès, 1834 | | 0 | Species | Taxom | | Rhipicephalus Ziemanni Neu..., 1806 | | 1 | Species | Taxom | | Rhysodromus Schick, 1819 | | 1 | Species | Taxom | Saprolaelaps Leitner, 1947 | | 0 | Species | Taxom | | Schizocosa Chamberlin, 1904 | | 1 | Species | Taxom | | Scotophaeus Simon, 1871 | | 1 | Species | Taxom | | Segestria Latreille, 1891 | | 1 | Species | Taxom | | Sergiolus Simon, 1890 | | 1 | Species | Taxom | | Socalchemmis Platnick & U..., 1919 | | 1 | Species | Taxom | | Steatoda Sundevall, 1838 | False black widows | 1 | Species | Taxom | | Stibarokris Kethley, 1970 | | 1 | Species | Taxom | | Synsphyronus J. C. Chambe..., 1943 | | 1 | Species | Taxom | | Talavera Peckham & Pe..., 1895 | | 1 | Species | Taxom | | Tarsonemus Canestrini &..., 1939 | | 1 | Species | Taxom | | Tenuipalpus Donnadieu, 1952 | | 1 | Species | Taxom | | Tetragnatha Latreille, 1842 | Four-jawed spider | 2 | Species | Taxom | | Tetranychus Dufour, 1919 | | 2 | Species | Taxom | | Theridion Walckenaer, 1904 | Tangle-Web Spiders | 1 | Species | Taxom | | Tibellus Simon, 1802 | Slender Crab Spider | 1 | Species | Taxom | Tricholathys Chamberlin &..., 1935 | | 0 | Species | Taxom | | Uroctonus Thorell, 1876 | Forest scorpions | 1 | Species | Taxom | | Utivarachna Kishida, 2001 | | 1 | Species | Taxom | | Xysticus Koch, 1880 | Ground Crab Spider | 1 | Species | Taxom | | Zelotes Gistel, 1922 | | 3 | Species | Taxom | Zercon C.L.Koch, 1836 | | 0 | Species | Taxom | | Zygiella F. O. P.-Cam..., 1757 | | 1 | Species | Taxom |
Species list for Contra Costa County
122 Species and 1 Subspecies | Aculepeira packardi Thorell, 1875 | | | Aculops fuchsiae Keifer, 1972 | Fuchsia gall mite | | Aculus ligustri Keifer, 1938 | | | Agyneta fillmorana Chamberlin, 1919 | | | Alloptes (Sternalloptes) cyrtolobus Gaud, 1976 | | | Alopecosa aculeata Clerck, 1758 | | | Anharpyrhynchus monstrosus Fritsch, 1954 | | | Anyphaena pacifica Richard C. B..., 1896 | | | Apochinomma formica Eugène Simon, 1896 | | | Araneus nordmanni Thorell, 1870 | Nordmann'S Orbweaver | | Araneus saevus L. Koch, 1872 | Fierce Orbweaver | | Araneus thaddeus (Hentz, 1847) | ⇒ Araneus meropes Keyserling, 1865 | | Araneus trifolium Hentz, 1847 | Shamrock orbweaver | | Archaeodictyna ammophila Menge, 1871 | | | Argiope aurantia Lucas, 1833 | American garden spider | | Blabomma californicum Eugène Simon, 1895 | | | Brevipalpus obovatus Donnadieu, 1875 | Privet false spider mite | | Brevipalpus pini Baker, 1949 | | | Bryobia (Bryobia) praetiosa (C. L. Koch, 1835) | ⇒ Bryobia macrotibialis Mathys, 1962 | | Calicina serpentinea Briggs & Hom, 1966 | | | Callobius severus Eugène Simon, 1884 | | | Carabodes scymnus Hull, 1914 | | | Castianeira crocata Nicholas Mar..., 1847 | | | Centrotrombidium culicoides Vercammen-Gr..., 1957 | | | Cheiracanthium inclusum Hentz, 1847 | Agrarian sac spider | | Cyclosa conica Pallas, 1772 | Conical Trashline Orbweaver | | Dermacentor (Americentor) albipictus Packard, 1869 | Elk tick | | Dermacentor occidentalis Marx, 1892 | Net tick | | Dermacentor variabilis Say, 1821 | American dog tick | | Dipoena nigra (James Henry ..., 1882) | ⇒ Theridula nigerrima Alexander Pe..., 1911 | | Drassyllus insularis Banks, 1900 | | | Drassyllus orgilus (Chamberlin, 1922) | ⇒ Drassyllus dromeus Chamberlin, 1922 | | Dysdera nomada Eugène Simon, 1910 | Stocky cerith | | Dysdera pristiphora Carlo Pesarini, 2001 | | | Ellingsenius sculpturatus Lewis, 1903 | | | Eremobates palpisetulosus Fichter, 1941 | | | Galendromus (Galendromus) occidentalis Nesbitt, 1951 | Western predatory mite | | Gamasiphis gamasellus Berlese, 1913 | | | Geogarypus rhantus Harvey, 1981 | | | Gnaphosa muscorum (Carl Ludwig ..., 1866) | ⇒ Gnaphosa similis KulczyÅ„ski, 1926 | | Gnaphosa petrobia Carl Ludwig ..., 1872 | | | Habronattus conjunctus Banks, 1898 | | | Habronattus klauseri Peckham & Pe..., 1901 | | | Haemaphysalis leporispalustris Packard, 1869 | Grouse tick | | Haemogamasus pontiger Berlese, 1903 | | | Harpirhynchus brevis Ewing, 1911 | | | Heteropoda venatoria (Linnaeus, 1767) | ⇒ Heteropoda simplex Jäger & Ono, 2000 | | Hydranetes tropisternus Kethley, 1971 | | | Incestophantes amotus Andrei V. Ta..., 1990 | | | Ixodes angustus (Neumann, 1899) | ⇒ Ixodes woodi Bishopp, 1911 | | Ixodes auritulus Neumann, 1904 | | | Ixodes brunneus (Koch, 1844) | ⇒ Ixodes neuquenensis Ringuelet, 1947 | | Ixodes pacificus Cooley & Kohls, 1943 | California black-legged tick | | Ixodes rugosus Bishopp, 1911 | | | Kukulcania arizonica Ralph Vary C..., 1935 | Arizona black hole spider | | Larinioides cornutus Clerck, 1758 | Furrow orb spider | | Lathys immaculata Ralph Vary C..., 1944 | | | Latrodectus geometricus C. L. Koch, 1841 | Brown black widow | | Latrodectus mactans (Fabricius, 1775) | ⇒ Latrodectus tredecimguttatus Rossi, 1790 | | Leuronychus pacificus Banks, 1894 | | | Mangora placida Hentz, 1847 | Tuft-Legged Orb Weaver | | Mastophora cornigera (Nicholas Mar..., 1850) | ⇒ Mastophora hutchinsoni Willis J. Ge..., 1955 | | Mecaphesa californica Richard C. B..., 1896 | | | Mecaphesa lepida Tord Tamerla..., 1877 | | | Megahexura fulva Chamberlin, 1919 | | | Melychiopharis cynips Eugène Simon, 1895 | | | Microbisium parvulum Banks, 1895 | | | Misumena vatia Clerck, 1758 | Crab Spider | | Monoceronychus californicus (McGregor, 1945) | ⇒ Monoceronychus littoralis Tuttle, Bake..., 1976 | | Myrmarachne platypalpus (Bradoo, 1980) | ⇒ Myrmarachne platypalpa Bradoo, 1980 | | Neoscona oaxacensis Keyserling, 1864 | Orb weavers | | Neoseiulus fallacis Garman, 1948 | Predaceous mite | | Neriene clathrata Sundevall, 1830 | | | Neriene digna Eugen von Ke..., 1886 | | | Nodocion voluntarius Chamberlin, 1919 | | | Oligonychus (Oligonychus) milleri McGregor, 1950 | Pine spider mite | | Oligonychus (Oligonychus) ununguis Jacobi, 1905 | Common conifer spider mite | | Oligonychus (Wainsteiniella) subnudus McGregor, 1950 | | | Ortholasma rugosum Banks, 1894 | | | Otobius megnini Dugès, 1884 | Ear tick | | Oxyopes salticus Hentz, 1845 | Lynx spider | | Oxyopes scalaris Nicholas Mar..., 1845 | Western lynx spider | | Panonychus (Panonychus) citri McGregor, 1916 | Citrus red mite | | Pardosa lapidicina (James Henry ..., 1885) | ⇒ Pardosa mercurialis M. E. Montgo..., 1904 | | Paruroctonus variabilis Hjelle, 1982 | | | Pelegrina aeneola Curtis, 1892 | Cottonwood borer | | Peucetia viridans Hentz, 1832 | Green Lynx Spider | | Phalangium opilio Linnaeus, 1761 | Brown daddy-long-legs | | Phidippus johnsoni Peckham & Pe..., 1883 | Johnson jumper | | Pholcophora americana Banks, 1896 | | | Pholcus phalangioides (Fuesslin, 1775) | ⇒ Smeringopus pallidus Blackwall, 1858 | | Phytoseius floridanus Muma, 1962 | | | Pirata piraticus (Clerck, 1757) | ⇒ Trebacosa marxi Witmer Stone, 1890 | | Pityohyphantes subarcticus Ralph Vary C..., 1943 | Maricopa harvester ant | | Platytetranychus libocedri McGregor, 1936 | Shorthorn decorator crab | | Poecilopachys australasia Griffith & P..., 1833 | Two-spined Spider | | Rhipicephalus (Rhipicephalus) sanguineus (Latreille, 1806) | ⇒ Rhipicephalus sanguineus Latreille, 1806 | | Rhysodromus histrio (Latreille, 1819) | ⇒ Philodromus histrio Latreille, 1819 | | Schizocosa mccooki M. E. Montgo..., 1904 | Spoon worms | | Scotophaeus blackwalli (Thorell, 1871) | ⇒ Scotophaeus peninsularis Carl Friedri..., 1928 | | Segestria pacifica Richard C. B..., 1891 | | | Sergiolus montanus Emerton, 1890 | | | Socalchemmis dolichopus Ralph Vary C..., 1919 | | | Steatoda grossa C. L. Koch, 1838 | Brown house spider | | Stibarokris phalacrus Kethley, 1970 | | | Synsphyronus mimetus Chamberlin, 1943 | Costate mountainsnail | | Talavera minuta Richard C. B..., 1895 | | | Tarsonemus (Tarsonemus) cryptocephalus Ewing, 1939 | | | Tenuipalpus pigrus Pritchard & ..., 1952 | | | Tetragnatha trichodes trichodes Thorell, 1878 | | | Tetragnatha versicolor Walckenaer, 1842 | | | Tetranychus (Tetranychus) urticae C. L. Koch, 1836 | Carmine spider mite | | Tetranychus pacificus McGregor, 1919 | Pacific mite | | Theridion californicum Richard C. B..., 1904 | | | Tibellus oblongus (Walckenaer, 1802) | ⇒ Tibellus maritimus Menge, 1875 | | Uroctonus mordax Thorell, 1876 | California Forest Scorpion | | Utivarachna ichneumon Christa L. D..., 2001 | | | Xysticus californicus Eugen von Ke..., 1880 | | | Zelotes discens Chamberlin, 1922 | | | Zelotes fratris Chamberlin, 1920 | | | Zelotes puritanus Chamberlin, 1922 | | | Zygiella x-notata (Clerck, 1757) | ⇒ Guizygiella nadleri Heimer, 1984 |
Subnodes of Arachnida with occurrences in Contra Costa County
 | | Arachnida (Lamarck 1801) |
Links, sources and further information Arachnida at biolcoll.utu.fi
Arachnida at wiki.spinnen-forum.de
Arachnida at spiderling.de
Arachnida at wsc.nmbe.ch
Arachnida at artfakta.se
Arachnida at biodiversity.org.au
Arachnida at dyntaxa.se
Arachnida at gbif.org
Arachnida at irmng.org
Arachnida at itis.gov
Arachnida at marinespecies.org
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