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Checklist for Infraorder Araneomorphi Smith, 1902
and region Powder River County (Montana, USA)


Class
 		Arachnida
Lamarck, 1801
Arachnids		8
10
9		Families
Genera
Species		 
Taxom
 

Subclass
 		Micrura
Ehrenberg, 1831
6
8
8		Families
Genera
Species		 
Taxom
 

Infraclass
 		Megoperculata
Börner, 1902
6
8
8		Families
Genera
Species		 
Taxom
 

Order
 		Araneae
Clerck, 1757
Spider, Spiders, True Spiders		6
8
8		Families
Genera
Species		 
Taxom
 

Suborder
 		Araneomorphae
Smith, 1902
True Spiders		6
8
8		Families
Genera
Species		 
Taxom
 

Infraorder
 		Araneomorphi
Smith, 1902
6
8
8		Families
Genera
Species		 
Taxom
 


List of families for Powder River County
6 Families width 8 Species
Thomisidae Sundevall, 1833Crab Spider2SpeciesTaxom
Lycosidae (Lehtinen & H..., 1979)Ground Spiders1SpeciesTaxom
Salticidae Blackwall, 1842Jumping Spider1SpeciesTaxom
Philodromidae (Thorell, 1870)False crab spiders1SpeciesTaxom
Theridiidae Sundevall, 1833Cobweb And Widow Spiders2SpeciesTaxom
Tetragnathidae Menge, 1866Elongated Orb Weavers1SpeciesTaxom


Genera for Powder River County
8 Genera with 8 Species
Mecaphesa Simon, 18471SpeciesTaxom
Pardosa C. L. Koch, 1877Thin-legged Wolf Spider1SpeciesTaxom
Pelegrina Franganillo, 1951White-Cheeked Jumping Spiders1SpeciesTaxom
Philodromus Walckenaer, 1826Running Crab Spider1SpeciesTaxom
Steatoda Sundevall, 1901False black widows1SpeciesTaxom
Tetragnatha Latreille, 1842Four-jawed spider1SpeciesTaxom
Theridion Walckenaer, 1901Tangle-Web Spiders1SpeciesTaxom
Xysticus Koch, 1880Ground Crab Spider1SpeciesTaxom


Species list for Powder River County
8 Species
Mecaphesa asperata Nicholas Mar..., 1847Crab Spiders
Pardosa uncata (Tord Tamerla..., 1877)⇒ Pardosa algoides Ehrenfried S..., 1963
Pelegrina clemata Levi & Herbe..., 1951
Philodromus rufus (Walckenaer, 1826)⇒ Philodromus albidus Wladislaus K..., 1911
Steatoda grandis (Richard C. B..., 1901)⇒ Steatoda mexicana Herbert Walt..., 1957
Tetragnatha versicolor Walckenaer, 1842
Theridion neomexicanum Richard C. B..., 1901
Xysticus triguttatus Keyserling, 1880Three-banded Crab Spider