''Eutrichodesmus'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

millipede Millipedes (originating from the Latin , "thousand", and , "foot") are a group of arthropods that are characterised by having two pairs of jointed legs on most body segments; they are known scientifically as the class Diplopoda, the name derive ...

s in the Family (biology), family Haplodesmidae. Containing 54 species, this genus is among the genera with the greatest number of species not only in the family Haplodesmidae but also in the Order (biology), order Polydesmida. This genus includes the species ''Eutrichodesmus peculiaris, E. peculiaris'', notable for featuring sexual dimorphism in segment number: The adult females have 20 segments (counting the collum as the first segment and the telson as the last), but the adult males have only 19 segments. Millipedes in this genus are found in southern Japan, Taiwan, southern China, mainland Southeast Asia, Indonesia, and Vanuatu.

Description

Millipedes in this genus are small, ranging from 3.5 mm to 14 mm in length. These millipedes can have 19 or 20 segments. Species in this genus are capable of volvation, which is usually complete but sometimes incomplete. The basal element of the gonopod (coxa) in adult males in this genus usually features abundant setae. The distal element of the gonopod (telopodite) is usually slender and long, with dense setae on the basal half. The telopodite often features a conspicuous outgrowth on the lateral side. The distal part of the telopodite is conspicuous and well developed but rarely branches into a separate lobe. The millipedes in this genus resemble those in the genus ''Doratodesmus'', which are also capable of volvation. Like the adult males in ''Eutrichodesmus'', those in ''Doratodesmus'' also usually feature gonopod coxae with abundant setae. The adult males in ''Doratodesmus'', however, feature gonopod telopodites that are usually stout and markedly enlarged toward the sides, unlike those usually observed in ''Eutrichodesmus'', which are slender.

Species

This genus includes the following species: * ''Eutrichodesmus arcicollaris'' Zhang, 1993 * ''Eutrichodesmus armatocaudatus'' Golovatch, Geoffroy, Mauriès & VandenSpiegel, 2009 * ''Eutrichodesmus aster'' Golovatch, Geoffroy, Mauriès & VandenSpiegel, 2009 * ''Eutrichodesmus asteroides'' Golovatch, Geoffroy, Mauriès & VandenSpiegel, 2009 * ''Eutrichodesmus basalis'' Golovatch, Geoffroy, Mauriès & VandenSpiegel, 2009 * ''Eutrichodesmus cavernicola'' Sinclair, 1901 * ''Eutrichodesmus communicans'' Golovatch, Geoffroy, Mauriès & VandenSpiegel, 2009 * ''Eutrichodesmus curticornis'' Golovatch, Geoffroy, Mauriès & VandenSpiegel, 2009 * ''Eutrichodesmus demangei'' Silvestri, 1910 * ''Eutrichodesmus deporatus'' Liu, Golovatch & Wesener, 2017 * ''Eutrichodesmus distinctus'' Golovatch, Geoffroy, Mauriès & VandenSpiegel, 2009 * ''Eutrichodesmus dorsiangulatus'' Zhang, 1993 * ''Eutrichodesmus filisetiger'' Golovatch, Geoffroy, Mauriès & VandenSpiegel, 2009 * ''Eutrichodesmus gremialis'' Hoffman, 1982 * ''Eutrichodesmus griseus'' Golovatch, Geoffroy, Mauriès & VandenSpiegel, 2009 * ''Eutrichodesmus incisus'' Golovatch, Geoffroy, Mauriès & VandenSpiegel, 2009 * ''Eutrichodesmus latus'' Golovatch, Geoffroy, Mauriès & VandenSpiegel, 2009 * ''Eutrichodesmus macclurei'' Hoffman, 1977 * ''Eutrichodesmus monodentus'' Zhang, 1993 * ''Eutrichodesmus multilobatus'' Golovatch, Geoffroy, Mauriès & VandenSpiegel, 2009 * ''Eutrichodesmus paraster'' Liu, Golovatch & Wesener, 2017 * ''Eutrichodesmus parvus'' Liu, Golovatch & Wesener, 2017 * ''Eutrichodesmus peculiaris'' Murakami, 1966 * ''Eutrichodesmus reclinatus'' Hoffman, 1977 * ''Eutrichodesmus reductus'' Golovatch, Geoffroy, Mauriès & VandenSpiegel, 2009 * ''Eutrichodesmus regularis'' Golovatch, Geoffroy, Mauriès & VandenSpiegel, 2009 * ''Eutrichodesmus similis'' Golovatch, Geoffroy, Mauriès & VandenSpiegel, 2009 * ''Eutrichodesmus steineri'' Liu, Golovatch & Wesener, 2017

Gallery

Image:Eutrichodesmus_asteroides_(male).JPG, ''Eutrichodesmus asteroides, E. asteroides'' Image:Eutrichodesmus_curticornis_(female).JPG, ''Eutrichodesmus curticornis, E. curticornis'' Image:Eutrichodesmus_distinctus_(male).JPG, ''Eutrichodesmus distinctus, E. distinctus'' Image:Eutrichodesmus_filisetiger_(male).JPG, ''Eutrichodesmus filisetiger, E. filisetiger'' Image:Eutrichodesmus_griseus_(female).JPG, ''Eutrichodesmus griseus, E. griseus'' Image:Eutrichodesmus_multilobatus_(female).JPG, ''Eutrichodesmus multilobatus, E. multilobatus'' Image:Eutrichodesmus_reductus.JPG, ''Eutrichodesmus reductus, E. reductus'' Image:Eutrichodesmus regularis (male).JPG, ''Eutrichodesmus regularis, E. regularis''

Description

Species

Gallery

References

Further reading