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Checklist for Class Arachnida Lamarck, 1801 (Arachnids)
and region Concord (Contra Costa County, California, USA)


Class
 		Arachnida
Lamarck, 1801
Arachnids		6
7
7		Families
Genera
Species		 
Taxom
 


List of families for Concord (Contra Costa County)
6 Families width 7 Species
Eriophyidae Nalepa, 1898Blister mites1SpeciesTaxom
Dictynidae O. P-Cambridge, 1871Dictynid spiders1SpeciesTaxom
Araneidae Simon, 1895Golden orb web spiders2SpeciesTaxom
Gnaphosidae (Pocock, 1898)Flat-bellied ground spiders1SpeciesTaxom
Garypidae Simon, 18791SpeciesTaxom
Tetranychidae Donnadieu, 1875Spider mites1SpeciesTaxom


Genera for Concord (Contra Costa County)
7 Genera with 7 Species
Aculus Keifer, 19381SpeciesTaxom
Lathys Simon, 19441SpeciesTaxom
Neoscona Simon, 1864Spotted orbweavers1SpeciesTaxom
Poecilopachys Simon, 18331SpeciesTaxom
Scotophaeus Simon, 18711SpeciesTaxom
Synsphyronus J. C. Chambe..., 19431SpeciesTaxom
Tetranychus Dufour, 18361SpeciesTaxom


Species list for Concord (Contra Costa County)
7 Species
Aculus ligustri Keifer, 1938
Lathys immaculata Ralph Vary C..., 1944
Neoscona oaxacensis Keyserling, 1864Orb weavers
Poecilopachys australasia Griffith & P..., 1833Two-spined Spider
Scotophaeus blackwalli (Thorell, 1871)⇒ Scotophaeus peninsularis Carl Friedri..., 1928
Synsphyronus mimetus Chamberlin, 1943Costate mountainsnail
Tetranychus (Tetranychus) urticae C. L. Koch, 1836Carmine spider mite

Subnodes of Arachnida with occurrences in Concord (Contra Costa County)
SubclassDromopoda
Shultz, 1990
1
1
1		Family
Genus
Species
Taxom

SubclassMicrura
Ehrenberg, 1831
5
6
6		Families
Genera
Species
Taxom



Arachnida (Lamarck 1801)
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