# Orthomorpha

Orthomorpha is a genus of millipedes in the family Paradoxosomatidae containing approximately 50 species distributed in Southeast Asia.

## Description

Species of Orthomorpha possess 20 body segments and range from 15–50 mm long as adults. They range from 1.1–3.1 mm in body width, with prominent paranota (lateral keels) extending the width to 1.5–6.7 mm. Base coloration varies from brown to black, with brightly colored paranota and markings in various shades of yellow, orange, and brown, which becomes fainter in alcohol-preserved specimens. Some species have prominent bumps or "tubercles" on their dorsal metatergal segments.

## Distribution

Orthomorpha species range from Myanmar in the west, through the entire Indochinese Peninsula, to Lombok, Indonesia. The species O. coarctata, (also known as Asiomorpha coarctata) has been widely introduced by humans in tropics around the world.

## Species

The genus was revised by Likhitrakarn, Golovatch & Panha in 2011, who described several new species and assigned two to the new genus Orthomorphoides, yielding a total of 51 named species of Orthomorpha. Three more species from Laos were described in 2014.
Orthomorpha arboricola (Attems, 1937)
Orthomorpha asticta Likhitrakarn, Golovatch & Panha, 2010 Orthomorpha atypica Likhitrakarn, Golovatch, & Panha, 2011 Orthomorpha baliorum Golovatch, 1995 Orthomorpha banglangensis Golovatch, 1998 Orthomorpha beaumontii (Le Guillou, 1841)
Orthomorpha beroni Golovatch, 1997 Orthomorpha bipunctata (Sinclair, 1901)
Orthomorpha butteli Carl, 1922 Orthomorpha cambodjana (Attems, 1953)
Orthomorpha coarctata (De Saussure, 1860) (Alternately known as Asiomorpha coarctata) Orthomorpha communis Likhitrakarn, Golovatch, & Panha, 2011 Orthomorpha conspicua (Pocock, 1894)
Orthomorpha crucifer (Pocock, 1889)
Orthomorpha elevata Likhitrakarn, Golovatch, & Panha, 2011 Orthomorpha enghoffi Likhitrakarn, Golovatch & Panha, 2010 Orthomorpha flaviventer (Attems, 1898)
Orthomorpha fluminoris Hoffman, 1977 Orthomorpha francisca Attems, 1930 Orthomorpha fuscocollaris Pocock, 1895 Orthomorpha gladiata Likhitrakarn, Golovatch, & Panha, 2014 Orthomorpha glandulosa (Attems, 1937)
Orthomorpha horologiformis Golovatch, 1998 Orthomorpha hydrobiologica Attems, 1930
Orthomorpha insularis Pocock, 1895 Orthomorpha isarankurai Likhitrakarn, Golovatch, & Panha, 2011 Orthomorpha karschi (Pocock, 1889)
Orthomorpha latiterga Likhitrakarn, Golovatch, & Panha, 2011 Orthomorpha lauta Golovatch, 1998 Orthomorpha melischi Golovatch, 1997 Orthomorpha mikrotropis Attems, 1898 Orthomorpha murphyi Hoffman, 1977 Orthomorpha parasericata Likhitrakarn, Golovatch & Panha, 2010 Orthomorpha paviei Brölemann, 1896 Orthomorpha picturata Likhitrakarn, Golovatch, & Panha, 2011 Orthomorpha pterygota Golovatch, 1998 Orthomorpha rotundicollis (Attems, 1937)
Orthomorpha scabra Jeekel, 1964 Orthomorpha sericata Jeekel, 1964 Orthomorpha similanensis Likhitrakarn, Golovatch, & Panha, 2011 Orthomorpha spiniformis Likhitrakarn, Golovatch, & Panha, 2011 Orthomorpha subelevata Likhitrakarn, Golovatch, & Panha, 2011 Orthomorpha suberecta Likhitrakarn, Golovatch, & Panha, 2011 Orthomorpha suberectoides Likhitrakarn, Golovatch, & Panha, 2014 Orthomorpha subkarschi Golovatch, 1998 Orthomorpha subsericata Golovatch, 1998 Orthomorpha subtuberculifera Likhitrakarn, Golovatch, & Panha, 2011 Orthomorpha sutchariti Likhitrakarn, Golovatch, & Panha, 2014 Orthomorpha tenuipes (Attems, 1898)
Orthomorpha thalebanica Golovatch, 1998 Orthomorpha tuberculifera Likhitrakarn, Golovatch, & Panha, 2011 Orthomorpha unicolor Attems, 1930 Orthomorpha weberi (Pocock, 1894)