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Checklist for Order Polydesmida Pocock, 1887 (Flat-backed Millipedes)
and region Washington County (Ohio, USA)


Class
 		Diplopoda
De Blainville in Gervais, 1844
Diplopods, Millepedes, Millipede, Millipedes		10
16
14		Families
Genera
Species		 
Taxom
 

Subclass
 		Chilognatha
Latreille, 1802
10
16
14		Families
Genera
Species		 
Taxom
 

Infraclass
 		Helminthomorpha
Pocock, 1887
10
16
14		Families
Genera
Species		 
Taxom
 

Superorder
 		Merocheta
Cook, 1895
4
8
6		Families
Genera
Species		 
Taxom
 

Order
 		Polydesmida
Pocock, 1887
Flat-backed Millipedes		4
8
6		Families
Genera
Species		 
Taxom
 


List of families for Washington County (Ohio)
4 Families width 6 Species
Paradoxosomatidae (Daday, 1889)1SpeciesTaxom
Xystodesmidae Cook, 1895Xystodesmid Millipedes2SpeciesTaxom
Platyrhacidae Pocock, 18951SpeciesTaxom
Polydesmidae Leach, 1815Flat Millipedes2SpeciesTaxom


Genera for Washington County (Ohio)
8 Genera with 6 Species
Desmoxytes Chamberlin, 1923
Dragon millipedes0SpeciesTaxom
Nannaria Chamberlin, 1948Twisted-Claw Millipedes1SpeciesTaxom
Oxidus Cook, 18471SpeciesTaxom
Platyrhacus Koch, 18991SpeciesTaxom
Prionopeltis Hawle, 1847
0SpeciesTaxom
Pseudopolydesmus Attems, 18211SpeciesTaxom
Scytonotus Koch, 18211SpeciesTaxom
Semionellus Chamberlin, 18641SpeciesTaxom


Species list for Washington County (Ohio)
6 Species
Nannaria ohionis Loomis & Hof..., 1948
Oxidus gracilis (C. L. Koch, 1847)⇒ Oxidus gigas Attems, 1953
Platyrhacus helophorus Attems, 1899
Pseudopolydesmus serratus Say, 1821Common Pink Flat-Back Millipede
Scytonotus granulatus Say, 1821Granulated Millipede
Semionellus placidus Wood, 1864Grand Coulee mountainsnail

Subnodes of Polydesmida with occurrences in Washington County (Ohio)
SuborderChelodesmidea
Cook, 1895
2
3
3		Families
Genera
Species
Taxom

SuborderParadoxosomatidea
Daday, 1889
1
3
1		Family
Genera
Species
Taxom

SuborderPolydesmidea
Leach, 1815
1
2
2		Family
Genera
Species
Taxom



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