Species list, Checklist of Order Spirobolida (Round-backed millipedes) for Riverside County (Eastern California, California, USA)

Ants	Arachnids
Bees	Beetles
Booklice	Bugs
Bumblebees	Butterflies
Cicadas	Crane flies
Dragonflies	Earwigs
Flies	Isopods
Locusts	Mantises
Mayflies	Mosquitoes
Myriapods	Net-winged
Plant-parasitic	Scorpion flies
Termites	Wasps

Taxonomy & Distribution
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INSECTOIDGERENGDARK LIGHT

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Checklist for Order Spirobolida Cook, 1895 (Round-backed millipedes)
and region Riverside County (Eastern California, California, USA)

Class	Diplopoda De Blainville in Gervais, 1844 Diplopods, Millepedes, Millipede, Millipedes	9 11 11	Families Genera Species	Taxom
Subclass	Chilognatha Latreille, 1802	9 11 11	Families Genera Species	Taxom
Infraclass	Helminthomorpha Pocock, 1887	9 11 11	Families Genera Species	Taxom
Superorder	Anocheta Cook, 1895	3 4 4	Families Genera Species	Taxom
Order	Spirobolida Cook, 1895 Round-backed millipedes	3 4 4	Families Genera Species	Taxom

List of families for Riverside County
3 Families width 4 Species

Spirobolidae Bollman, 1893	2	Species	Taxom
Atopetholidae Chamberlin, 1918	1	Species	Taxom
Trigoniulidae Attems, 1909	1	Species	Taxom

Genera for Riverside County
4 Genera with 4 Species

Hiltonius Chamberlin, 1953	1	Species	Taxom
Onychelus Cook, 1904	1	Species	Taxom
Trigoniulus Pocock, 1945	1	Species	Taxom
Tylobolus Cook, 1949	1	Species	Taxom

Species list for Riverside County
4 Species

Hiltonius palmaris (Loomis, 1953)	⇒ Hiltonius pulchrus Chamberlin, 1918
Onychelus obustus Cook, 1904	Rocky mountainsnail
Trigoniulus amnestus Chamberlin, 1945
Tylobolus simulatus Chamberlin, 1949

Subnodes of Spirobolida with occurrences in Riverside County

Suborder	Trigoniulidea Brölemann, 1913	1 1 1	Family Genus Species	Taxom
Family	Atopetholidae Chamberlin, 1918	1 1	Genus Species	Taxom
Family	Spirobolidae Bollman, 1893	2 2	Genera Species	Taxom

Links, sources and further information

Spirobolida at artfakta.se
Spirobolida at dyntaxa.se
Spirobolida at gbif.org
Spirobolida at irmng.org
Spirobolida at itis.gov