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Checklist for Infraclass Palaeoptera Crampton, 1915 (Ancient winged insects)
and region Southwest USA (West USA, USA)


Class
 		Insecta
Linnaeus, 1758
Insects, True insects		681
9912
35623		Families
Genera
Species		 
Taxom
 

Subclass
 		Pterygota
Lang, 1888
Winged insects		676
9893
35599		Families
Genera
Species		 
Taxom
 

Infraclass
 		Palaeoptera
Crampton, 1915
Ancient winged insects		27
129
321		Families
Genera
Species		 
Taxom
 


List of families for Southwest USA
7 Families width 321 Species and 4 Subspecies
Baetidae Leach, 1815Mayflies16SpeciesTaxom
Caenidae Newman, 1853Small square-gill mayflies2SpeciesTaxom
Ephemerellidae (Klapálek, 1909)Blue-Winged Olive Ephemerellidae15SpeciesTaxom
Heptageniidae Needham, 1901Flat-Bodied Up-Wings Heptageniidae20SpeciesTaxom
Leptohyphidae Landa & Soldán, 1985Little Stout Crawler Mayflies5SpeciesTaxom
Leptophlebiidae Banks, 1900Leptophlebiids10SpeciesTaxom
Siphlonuridae Banks, 1900Primitive Minnow Mayflies19SpeciesTaxom

Subnodes of Palaeoptera with occurrences in Southwest USA
SuperorderEphemeropteroidea
Rohdendorf, 1968
13
44
97		Families
Genera
Species
Taxom



Links, sources and further information
Palaeoptera at itis.gov