Polyxenidae is a family of millipedes in the order Polyxenida. This family includes 109 species distributed among 23 genera. This family has a worldwide distribution, with species found on all continents except Antarctica.
Description Millipedes in this family range from 1.2 mm to 4.2 mm in length (not including the bundle of bristles at the tail end). All adults in this family feature 10 tergites in front of the telson and 13 pairs of legs. The male in this family features two to six pairs of pores on leg pairs 6 through 11. The male places his spermatophores on fine threads excreted from these pores.
Taxonomy The following subtaxa are recognised in the family Polyxenidae:
Genus Ankistroxenus Attems, 1907 Genus Apoxenus Chamberlin, 1947 Genus †Electroxenus Jacquemin-Nguyen Duy & Azar, 2004 (Lebanese amber, Barremian) Genus †Libanoxenus Jacquemin-Nguyen Duy & Azar, 2004 (Lebanese amber, Barremian) Genus Mesoxenotus Silvestri, 1948 Subfamily Hypogexeninae Schubart, 1947 Genus Hypogexenus Silvestri, 1903 Subfamily Macroxeninae Condé, 2008 Genus Afraustraloxenodes Nguyen Duy-Jacquemin, 2003 Genus Chilexenus Silvestri, 1948 Genus Macroxenodes Silvestri, 1948 Genus Macroxenus Brölemann, 1917 Subfamily Monographinae Condé, 2008 Genus Anopsxenus Condé & Jacquemin, 1963 Genus Eudigraphis Silvestri, 1948 Genus Mauritixenus Verhoeff, 1939 Genus Miopsxenus Condé, 1951 Genus Monographis Attems, 1907 Genus Pauropsxenus Silvestri, 1948 (With fossil species known from Burmese amber, Cenomanian) Genus Saroxenus Cook, 1896 Genus Silvestrus Jones, 1937 Genus Unixenus Jones, 1944 Subfamily Polyxeninae Lucas, 1840 Genus Polyxenus Latzel, 1884 Genus Propolyxenus Silvestri, 1948 Genus Typhloxenus Condé, 1955
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