Checklist for Class Arachnida Lamarck, 1801 (Arachnids)
and region Walnut Creek (Contra Costa County, California, USA)
List of families for Walnut Creek (Contra Costa County)
11 Families width 9 Species | Corinnidae Karsch, 1880 | Ant-like Sac Spiders | 1 | Species | Taxom | | Dysderidae C. L. Koch, 1837 | Dysderid spiders | 1 | Species | Taxom | | Ixodidae C. L. Koch, 1844 | Hard Tick | 1 | Species | Taxom | | Theridiidae Sundevall, 1833 | Cobweb And Widow Spiders | 0 | Species | Taxom | | Araneidae (Simon, 1895) | Golden orb web spiders | 2 | Species | Taxom | | Phytoseiidae Berlese, 1916 | Phytoseiid mites | 1 | Species | Taxom | | Oxyopidae Thorell, 1870 | Lynx spiders | 1 | Species | Taxom | | Parasitidae Oudemans, 1901 | Beetle Mites | 0 | Species | Taxom | | Sclerosomatidae Simon, 1879 | Sclerosomatid Harvestmen | 0 | Species | Taxom | | Lycosidae Lehtinen & H..., 1979 | Ground Spiders | 1 | Species | Taxom | | Gnaphosidae (Pocock, 1898) | Flat-bellied ground spiders | 1 | Species | Taxom |
Genera for Walnut Creek (Contra Costa County)
12 Genera with 9 Species | Apochinomma Pavesi, 1896 | | 1 | Species | Taxom | | Dysdera Latreille, 1910 | | 1 | Species | Taxom | | Ixodes Latreille, 1904 | | 1 | Species | Taxom | Latrodectus Walckenaer, 1805 | Black widow spider | 0 | Species | Taxom | | Mastophora Holmberg, 1850 | Angling spiders | 1 | Species | Taxom | | Neoseiulus Hughes, 1948 | | 1 | Species | Taxom | | Oxyopes Latreille, 1845 | Lynx Spiders | 1 | Species | Taxom | Pergamasus Berlese, 1903 | | 0 | Species | Taxom | Protolophus Banks, 1893 | | 0 | Species | Taxom | | Schizocosa Chamberlin, 1904 | | 1 | Species | Taxom | | Scotophaeus Simon, 1871 | | 1 | Species | Taxom | | Zygiella F. O. P.-Cam..., 1757 | | 1 | Species | Taxom |
Species list for Walnut Creek (Contra Costa County)
9 Species | Apochinomma formica Eugène Simon, 1896 | | | Dysdera nomada Eugène Simon, 1910 | Stocky cerith | | Ixodes auritulus Neumann, 1904 | | | Mastophora cornigera (Nicholas Mar..., 1850) | ⇒ Mastophora hutchinsoni Willis J. Ge..., 1955 | | Neoseiulus fallacis Garman, 1948 | Predaceous mite | | Oxyopes scalaris Nicholas Mar..., 1845 | Western lynx spider | | Schizocosa mccooki M. E. Montgo..., 1904 | Spoon worms | | Scotophaeus blackwalli (Thorell, 1871) | ⇒ Scotophaeus peninsularis Carl Friedri..., 1928 | | Zygiella x-notata (Clerck, 1757) | ⇒ Guizygiella nadleri Heimer, 1984 |
Subnodes of Arachnida with occurrences in Walnut Creek (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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