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Checklist for Suborder Polyphaga Emery, 1886 (Polyphags)
and region Cromwell (Pierce County, Washington, USA)


Class
 		Insecta
Linnaeus, 1758
Insects, True insects		10
16
16		Families
Genera
Species		 
Taxom
 

Subclass
 		Pterygota
Lang, 1888
Winged insects		10
16
16		Families
Genera
Species		 
Taxom
 

Infraclass
 		Neoptera
van der Wulp, 1890
Modern Wing-folding insects		6
10
10		Families
Genera
Species		 
Taxom
 

Superorder
 		Holometabola
Heider, 1889
Holometabolous Insects		5
9
9		Families
Genera
Species		 
Taxom
 

Order
 		Coleoptera
Linnaeus, 1758
Beetles, Coleopterans		4
8
8		Families
Genera
Species		 
Taxom
 

Suborder
 		Polyphaga
Emery, 1886
Polyphags		1
2
2		Family
Genera
Species		 
Taxom
 


List of families for Cromwell (Pierce County Washington)
1 Family width 2 Species
Hydrophilidae Latreille, 1802Silver Water Beetles2SpeciesTaxom


Genera for Cromwell (Pierce County Washington)
2 Genera with 2 Species
Helophorus Fabricius, 18811SpeciesTaxom
Hydrobius Leach, 17581SpeciesTaxom


Species list for Cromwell (Pierce County Washington)
2 Species
Helophorus (Rhopalohelophorus) brevipalpis Bedel, 1881
Hydrobius fuscipes C. Linnaeus, 1758Water Scavenger Beetle

Subnodes of Polyphaga with occurrences in Cromwell (Pierce County Washington)
InfraorderStaphyliniformia
Lameere, 1900
1
2
2		Family
Genera
Species
Taxom



Links, sources and further information
Polyphaga at artfakta.se
Polyphaga at dyntaxa.se
Polyphaga at gbif.org
Polyphaga at irmng.org
Polyphaga at itis.gov
Polyphaga at itis.gov