Oxidus gracilis (Koch, 1847); note blunt, non extended paranota. Asian introduction into North America, abundant in US & Canadian cities; often undergoes population explosions.

Helicorthomorpha holstii (Pocock, 1895), caudal end. North America, USA, Florida, Orange Co. An Asian species introduced into a plant nursery in Florida. Photo by G. B. Edwards.

Helicorthomorpha holstii (Pocock, 1895), anterior end. North America, USA, Florida, Orange Co. An Asian species introduced into a plant nursery in Florida. Photo by G. B. Edwards.

Somethus sp. Australia, Tasmania. Reproduced from Tasmanian multipedes site (http://www.qvmag.tas.gov.au/zoology/multipedes/mulintro.html) with permission of R. Mesibov.

Desmoxytes purpureus, the Shocking Pink Dragon Milliped. Asia, Thailand.

Akamptogonus novarae (Humbert & Saussure, 1869). Oceania, New Zealand, Chatham Islands, Chatham I. Specimen courtesy of H. Heatwole; photo by A. E. Bogan.

Oxidus gracilis (C.L. Koch, 1847); note blunt para-nota. North Amer-ica (introduced), USA, North Caro-lina, Wake Co., Raleigh.

Midbody segments of Asiomorpha coarctata (Saus-sure, 1860). Note sharply pointed, acuminate para-nota. North America, Mexico, Jalisco. Photo courtesy of F. Cupul.

Helicorthomorpha holstii (Pocock, 1895). close-up of right gonopod. North America, USA, Florida, Orange Co. An Asian species introduced into a plant nursery in Florida. Photo by G. B. Edwards.

Pogonosternum sp. Australia, Tasmania. Reproduced from Tasmanian multipedes site with permission of R. Mesibov.

Akamptogonus novarae  Oceania, NZ, Chatham I. Specimen courtesy of H. Heatwole; photo by A. E. Bogan.

Asiomorpha coarctata (Saussure, 1860)Asian species introduced from Florida southward. Photo courtesy of F. Cupul.

Desmoxytes sp. Asia, China. Note sharp segmental spines.

Asiomorpha coarctata (Saussure); note sharply pointed, acute paranota. Lesser Antilles, St. Barthelemy. Photo courtesy of K. Questal.

Asiomorpha coarctata (Saussure); note sharply pointed, acute paranota. Lesser Antilles, St. Barthelemy. Photo courtesy of K. Questal.

Pogonosternum sp. Australia, Tasmania. Reproduced from Tasmanian multipedes site (http://www.qvmag.tas.gov.au/zoology/multipedes/mulintro.html) with permission of R. Mesibov.

Notodesmus scotius Chamberlin, 1920. Australia, Tasmania. Reproduced from Tasmanian multipedes site (http://www.qvmag.tas.gov.au/zoology/multipedes/mulintro.html) with permission of R. Mesibov.

Helicorthomorpha holstii (Pocock, 1895). Oceania, USA, Hawaiian Is., Oahu, Honolulu; introduced. Photo courtesy of F.G. Howarth. Bishop Mus. Occas. Paps., 108:45, 2010.

Chondromorpha xanthotricha (Attems, 1898). Introduced. Lesser Antilles, St. Vincent & the Grenadines. Photo courtesy of M. de Silva.

Asiomorpha coarctata (Saussure, 1860) mating pair. Introduced. Jamaica. Photo courtesy of M. van de Merwe.

Strongylosoma stigmatosum mating pair. Photo courtesy of Z. Korsos.

Orthomorpha sp. Asia, Vietnam, Cat Tien National Park. Photo courtesy of Nguyen Duc Anh.

Desmoxytes draco (Cook & Loomis, 1924) Asia, China, Jiangxi Prov., Guling, S of Jiujiang. Photo by H.F. Loomis.

Dicranogonus sp. Australia, Tasmania. Reproduced from Tasmanian multipedes site (http://www.qvmag.tas.gov.au/zoology/multipedes/mulintro.html) with permission of R. Mesibov.

Aethalosoma solum Jeekel, 2006. Australia, Tasmania. Reproduced from Tasmanian multipedes site (http://www.qvmag.tas.gov.au/zoology/multipedes/mulintro.html) with permission of R. Mesibov.