Taxonomy
''Metaxyonycha'' was first named by Louis Alexandre Auguste Chevrolat in 1836, with the spelling "''Metazyonycha''", in Pierre François Marie Auguste Dejean, Dejean's ''Catalogue of Coleoptera''. According to Bousquet and Bouchard in 2013, ''Metaxyonycha'' is an incorrect subsequent spelling of ''Metazyonycha''. However, because the subsequent spelling is in prevailing usage and is attributed to the original spelling's publication, "''Metaxyonycha''" is considered the correct spelling. In some publications for the Neotropical realm, ''Metaxyonycha'' is also known as "''Colaspis''". This was because the Czech entomologist Jan Bechyné had synonymised ''Metaxyonycha'' with ''Colaspis'', after incorrectly assuming the two had the same type species, while splitting the species of ''Colaspis'' listed in the ''Coleopterorum Catalogus'' (a beetle catalog edited by Wilhelm Junk and Sigmund Schenkling) into a separate genus known as "''Maecolaspis''". As a result, Bechyné was using the name ''Colaspis'' for what was actually ''Metaxyonycha''.Species
The following species belong to the genus ''Metaxyonycha'' (or ''Colaspis'' sensu Bechyné): * ''Metaxyonycha acuminipennis'' (Émile Blanchard, Blanchard, 1843) * ''Metaxyonycha amasia'' Thomas Ansell Marshall, Marshall, 1864 * ''Metaxyonycha apochroma'' (Jan Bechyné, Bechyné & Bechyné, 1976) * ''Metaxyonycha argentiniensis'' Jan Bechyné, Bechyné, 1949 * ''Metaxyonycha augusta'' (Maximilian Perty, Perty, 1832) ** ''Metaxyonycha augusta augusta'' (Maximilian Perty, Perty, 1832) ** ''Metaxyonycha augusta kosñipata'' (Jan Bechyné, Bechyné & Bechyné, 1968) * ''Metaxyonycha auripennis'' (Ernst Friedrich Germar, Germar, 1824) * ''Metaxyonycha boggianii'' (Jan Bechyné, Bechyné, 1957) * ''Metaxyonycha bogotensis'' Martin Jacoby, Jacoby, 1900 ** ''Metaxyonycha bogotensis bogotensis'' Martin Jacoby, Jacoby, 1900 ** ''Metaxyonycha bogotensis splendicans'' (Jan Bechyné, Bechyné & Bechyné, 1968) * ''Metaxyonycha bondari'' (Jan Bechyné, Bechyné & Bechyné, 1968) * ''Metaxyonycha carminea'' (Jan Bechyné, Bechyné, 1955) * ''Metaxyonycha chloroptera'' (Ernst Friedrich Germar, Germar, 1824) * ''Metaxyonycha chlorospila'' Thomas Ansell Marshall, Marshall, 1864 * ''Metaxyonycha chotana'' (Jan Bechyné, Bechyné, 1958) * ''Metaxyonycha comica'' (Jan Bechyné, Bechyné, 1953) * ''Metaxyonycha concinna'' Édouard Lefèvre, Lefèvre, 1883 * ''Metaxyonycha connexa'' Thomas Ansell Marshall, Marshall, 1864 * ''Metaxyonycha corpulenta'' (Jan Bechyné, Bechyné, 1955) * ''Metaxyonycha costata'' Édouard Lefèvre, Lefèvre, 1877 * ''Metaxyonycha crucifera'' Thomas Ansell Marshall, Marshall, 1864 * ''Metaxyonycha defficiens'' (Jan Bechyné, Bechyné, 1953) * ''Metaxyonycha denieri'' (Jan Bechyné, Bechyné, 1953) * ''Metaxyonycha diringshofeni'' (Jan Bechyné, Bechyné & Bechyné, 1968) * ''Metaxyonycha distincta'' Joseph Sugar Baly, Baly, 1881 * ''Metaxyonycha dominga'' (Jan Bechyné, Bechyné, 1958) * ''Metaxyonycha elegans'' Édouard Lefèvre, Lefèvre, 1883 * ''Metaxyonycha elytrospila'' (Jan Bechyné, Bechyné & Bechyné, 1968) * ''Metaxyonycha excentritarsis'' (Jan Bechyné, Bechyné & Bechyné, 1968) * ''Metaxyonycha fasciata'' Édouard Lefèvre, Lefèvre, 1875 ** ''Metaxyonycha fasciata caurensis'' (Jan Bechyné, Bechyné & Bechyné, 1968) ** ''Metaxyonycha fasciata fasciata'' Édouard Lefèvre, Lefèvre, 1875 * ''Metaxyonycha flavofasciata'' (Bowditch, 1921) * ''Metaxyonycha fuscovitatta'' (Jan Bechyné, Bechyné, 1954) (note: pages 196–199 are missing in the PDF) * ''Metaxyonycha godmani'' (Martin Jacoby, Jacoby, 1879) * ''Metaxyonycha gounelli'' Édouard Lefèvre, Lefèvre, 1891 ** ''Metaxyonycha gounelli acrospina'' (Jan Bechyné, Bechyné & Bechyné, 1968) ** ''Metaxyonycha gounelli gounelli'' Édouard Lefèvre, Lefèvre, 1891 * ''Metaxyonycha granulata'' (Ernst Friedrich Germar, Germar, 1821) * ''Metaxyonycha guttifera'' (Jan Bechyné, Bechyné, 1955) ** ''Metaxyonycha guttifera guttifera'' (Jan Bechyné, Bechyné, 1955) ** ''Metaxyonycha guttifera lepidosoma'' (Jan Bechyné, Bechyné & Bechyné, 1968) * ''Metaxyonycha haroldi'' (Édouard Lefèvre, Lefèvre, 1891) * ''Metaxyonycha hirsuta'' Martin Jacoby, Jacoby, 1890 * ''Metaxyonycha hirtipennis'' (Martin Jacoby, Jacoby, 1881) * ''Metaxyonycha humeralis'' Thomas Ansell Marshall, Marshall, 1864 * ''Metaxyonycha humilis'' Thomas Ansell Marshall, Marshall, 1864 * ''Metaxyonycha hybrida'' (Édouard Lefèvre, Lefèvre, 1878) * ''Metaxyonycha jeanneli'' (Jan Bechyné, Bechyné, 1951) * ''Metaxyonycha jusepinensis'' (Jan Bechyné, Bechyné & Bechyné, 1968) * ''Metaxyonycha lacerdae'' Édouard Lefèvre, Lefèvre, 1884 * ''Metaxyonycha lefevrei'' (Edgar von Harold, Harold, 1875) * ''Metaxyonycha lima'' (Jan Bechyné, Bechyné, 1955) * ''Metaxyonycha limbata'' (Martin Jacoby, Jacoby, 1890) * ''Metaxyonycha longicornis'' (Jan Bechyné, Bechyné, 1951) * ''Metaxyonycha martinezi'' (Jan Bechyné, Bechyné, 1951) * ''Metaxyonycha mattogrossoensis'' (Scherer, 1964) * ''Metaxyonycha medeirosi'' (Jan Bechyné, Bechyné & Bechyné, 1961) * ''Metaxyonycha melanocephala'' (Jan Bechyné, Bechyné, 1953) * ''Metaxyonycha melanogastra'' (Édouard Lefèvre, Lefèvre, 1884) * ''Metaxyonycha mendesi'' Jan Bechyné, Bechyné, 1949 ** ''Metaxyonycha mendesi mendesi'' Jan Bechyné, Bechyné, 1949 ** ''Metaxyonycha mendesi zikani'' (Jan Bechyné, Bechyné, 1953) * ''Metaxyonycha minarum'' (Édouard Lefèvre, Lefèvre, 1888) * ''Metaxyonycha montesi'' (Jan Bechyné, Bechyné, 1953) * ''Metaxyonycha nigritarsis'' Édouard Lefèvre, Lefèvre, 1875 ** ''Metaxyonycha nigritarsis minor'' (Jan Bechyné, Bechyné, 1953) ** ''Metaxyonycha nigritarsis nigritarsis'' Édouard Lefèvre, Lefèvre, 1875 * ''Metaxyonycha ocanana'' (Édouard Lefèvre, Lefèvre, 1878) * ''Metaxyonycha octosignata'' Joseph Sugar Baly, Baly, 1881 * ''Metaxyonycha pallidula'' (Carl Henrik Boheman, Boheman, 1858) ** ''Metaxyonycha pallidula interior'' (Jan Bechyné, Bechyné, 1958) ** ''Metaxyonycha pallidula pallidula'' (Carl Henrik Boheman, Boheman, 1858) * ''Metaxyonycha panamensis'' Martin Jacoby, Jacoby, 1890 * ''Metaxyonycha parallela'' (Jan Bechyné, Bechyné, 1951) * ''Metaxyonycha piceola'' (Jan Bechyné, Bechyné & Bechyné, 1968) * ''Metaxyonycha plagiata'' Édouard Lefèvre, Lefèvre, 1891 * ''Metaxyonycha porcata'' (Ernst Friedrich Germar, Germar, 1824) * ''Metaxyonycha problematica'' (Jan Bechyné, Bechyné, 1951) * ''Metaxyonycha pulchra'' (Scherer, 1964) * ''Metaxyonycha quadrimaculata'' (Guillaume-Antoine Olivier, Olivier, 1808) * ''Metaxyonycha quadrinotata'' Thomas Ansell Marshall, Marshall, 1864 * ''Metaxyonycha radioni'' (Jan Bechyné, Bechyné, 1952) * ''Metaxyonycha richteri'' (Jan Bechyné, Bechyné, 1953) * ''Metaxyonycha rosiovittata'' Jan Bechyné, Bechyné, 1949 ** ''Metaxyonycha rosiovittata obsoleta'' (Jan Bechyné, Bechyné & Bechyné, 1968) ** ''Metaxyonycha rosiovittata rosiovittata'' Jan Bechyné, Bechyné, 1949 * ''Metaxyonycha rugosa'' Martin Jacoby, Jacoby, 1900 * ''Metaxyonycha salvini'' Martin Jacoby, Jacoby, 1881 * ''Metaxyonycha sanguinea'' Édouard Lefèvre, Lefèvre, 1878 * ''Metaxyonycha schinicola'' (Jan Bechyné, Bechyné, 1958) * ''Metaxyonycha seabrai'' (Jan Bechyné, Bechyné & Bechyné, 1968) * ''Metaxyonycha semiocclusa'' (Jan Bechyné, Bechyné, 1951) * ''Metaxyonycha sergipensis'' (Jan Bechyné, Bechyné & Bechyné, 1968) * ''Metaxyonycha signata'' Édouard Lefèvre, Lefèvre, 1885 * ''Metaxyonycha spinifera'' (Jan Bechyné, Bechyné, 1957) * ''Metaxyonycha tarsata'' Joseph Sugar Baly, Baly, 1881 * ''Metaxyonycha tejucana'' Thomas Ansell Marshall, Marshall, 1864 * ''Metaxyonycha tenuenotata'' (Jan Bechyné, Bechyné, 1950) * ''Metaxyonycha testacea'' (Johan Christian Fabricius, Fabricius, 1801) * ''Metaxyonycha tetrasticta'' Thomas Ansell Marshall, Marshall, 1864 * ''Metaxyonycha tricolor'' (Maximilian Perty, Perty, 1832) * ''Metaxyonycha tridentata'' Martin Jacoby, Jacoby, 1877 * ''Metaxyonycha trigonomera'' (Jan Bechyné, Bechyné & Bechyné, 1968) * ''Metaxyonycha validicornis'' Édouard Lefèvre, Lefèvre, 1885 * ''Metaxyonycha variolosa'' Martin Jacoby, Jacoby, 1890 * ''Metaxyonycha vianai'' Jan Bechyné, Bechyné, 1949 * ''Metaxyonycha vigia'' (Jan Bechyné, Bechyné & Bechyné, 1961) * ''Metaxyonycha violena'' (Jan Bechyné, Bechyné, 1954) * ''Metaxyonycha viridilimbata'' Édouard Lefèvre, Lefèvre, 1877 * ''Metaxyonycha vittulosa'' (Jan Bechyné, Bechyné, 1951) * ''Metaxyonycha weyrauchi'' (Jan Bechyné, Bechyné, 1950) ** ''Metaxyonycha weyrauchi chaparensis'' (Jan Bechyné, Bechyné, 1951) ** ''Metaxyonycha weyrauchi weyrauchi'' (Jan Bechyné, Bechyné, 1950) The following species are synonyms: * ''Metaxyonycha batesi'' Joseph Sugar Baly, Baly, 1881: Synonym of ''Metaxyonycha augusta'' (Maximilian Perty, Perty, 1832) * ''Metaxyonycha formosa'' Édouard Lefèvre, Lefèvre, 1883: Synonym of ''Metaxyonycha augusta'' (Maximilian Perty, Perty, 1832) * ''Metaxyonycha pretiosa'' Joseph Sugar Baly, Baly, 1881: Synonym of ''Metaxyonycha augusta'' (Maximilian Perty, Perty, 1832)References
{{taxonbar, from=Q60495162 Chrysomelidae genera Eumolpinae Beetles of North America Beetles of South America Taxa named by Louis Alexandre Auguste Chevrolat