Metaxyonycha is a genus of leaf beetles in the subfamily Eumolpinae.
Taxonomy Metaxyonycha was first named by Louis Alexandre Auguste Chevrolat in 1836, with the spelling "Metazyonycha", in 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 (Blanchard, 1843) Metaxyonycha amasia Marshall, 1864 Metaxyonycha apochroma (Bechyné & Bechyné, 1976) Metaxyonycha argentiniensis Bechyné, 1949 Metaxyonycha augusta (Perty, 1832) Metaxyonycha augusta augusta (Perty, 1832) Metaxyonycha augusta kosñipata (Bechyné & Bechyné, 1968) Metaxyonycha auripennis (Germar, 1824) Metaxyonycha boggianii (Bechyné, 1957) Metaxyonycha bogotensis Jacoby, 1900 Metaxyonycha bogotensis bogotensis Jacoby, 1900 Metaxyonycha bogotensis splendicans (Bechyné & Bechyné, 1968) Metaxyonycha bondari (Bechyné & Bechyné, 1968) Metaxyonycha carminea (Bechyné, 1955) Metaxyonycha chloroptera (Germar, 1824) Metaxyonycha chlorospila Marshall, 1864 Metaxyonycha chotana (Bechyné, 1958) Metaxyonycha comica (Bechyné, 1953) Metaxyonycha concinna Lefèvre, 1883 Metaxyonycha connexa Marshall, 1864 Metaxyonycha corpulenta (Bechyné, 1955) Metaxyonycha costata Lefèvre, 1877 Metaxyonycha crucifera Marshall, 1864 Metaxyonycha defficiens (Bechyné, 1953) Metaxyonycha denieri (Bechyné, 1953) Metaxyonycha diringshofeni (Bechyné & Bechyné, 1968) Metaxyonycha distincta Baly, 1881 Metaxyonycha dominga (Bechyné, 1958) Metaxyonycha elegans Lefèvre, 1883 Metaxyonycha elytrospila (Bechyné & Bechyné, 1968) Metaxyonycha excentritarsis (Bechyné & Bechyné, 1968) Metaxyonycha fasciata Lefèvre, 1875 Metaxyonycha fasciata caurensis (Bechyné & Bechyné, 1968) Metaxyonycha fasciata fasciata Lefèvre, 1875 Metaxyonycha flavofasciata (Bowditch, 1921) Metaxyonycha fuscovitatta (Bechyné, 1954) (note: pages 196–199, 202–203, 206–207 are missing in the PDF) Metaxyonycha godmani (Jacoby, 1879) Metaxyonycha gounelli Lefèvre, 1891 Metaxyonycha gounelli acrospina (Bechyné & Bechyné, 1968) Metaxyonycha gounelli gounelli Lefèvre, 1891 Metaxyonycha granulata (Germar, 1821) Metaxyonycha guttifera (Bechyné, 1955) Metaxyonycha guttifera guttifera (Bechyné, 1955) Metaxyonycha guttifera lepidosoma (Bechyné & Bechyné, 1968) Metaxyonycha haroldi (Lefèvre, 1891) Metaxyonycha hirsuta Jacoby, 1890 Metaxyonycha hirtipennis (Jacoby, 1881) Metaxyonycha humeralis Marshall, 1864 Metaxyonycha humilis Marshall, 1864 Metaxyonycha hybrida (Lefèvre, 1878) Metaxyonycha jeanneli (Bechyné, 1951) Metaxyonycha jusepinensis (Bechyné & Bechyné, 1968) Metaxyonycha lacerdae Lefèvre, 1884 Metaxyonycha lefevrei (Harold, 1875) Metaxyonycha lima (Bechyné, 1955) Metaxyonycha limbata (Jacoby, 1890) Metaxyonycha longicornis (Bechyné, 1951) Metaxyonycha martinezi (Bechyné, 1951) Metaxyonycha mattogrossoensis (Scherer, 1964) Metaxyonycha medeirosi (Bechyné & Bechyné, 1961) Metaxyonycha melanocephala (Bechyné, 1953) Metaxyonycha melanogastra (Lefèvre, 1884) Metaxyonycha mendesi Bechyné, 1949 Metaxyonycha mendesi mendesi Bechyné, 1949 Metaxyonycha mendesi zikani (Bechyné, 1953) Metaxyonycha minarum (Lefèvre, 1888) Metaxyonycha montesi (Bechyné, 1953) Metaxyonycha nigritarsis Lefèvre, 1875 Metaxyonycha nigritarsis minor (Bechyné, 1953) Metaxyonycha nigritarsis nigritarsis Lefèvre, 1875 Metaxyonycha ocanana (Lefèvre, 1878) Metaxyonycha octosignata Baly, 1881 Metaxyonycha pallidula (Boheman, 1858) Metaxyonycha pallidula interior (Bechyné, 1958) Metaxyonycha pallidula pallidula (Boheman, 1858) Metaxyonycha panamensis Jacoby, 1890 Metaxyonycha parallela (Bechyné, 1951) Metaxyonycha piceola (Bechyné & Bechyné, 1968) Metaxyonycha plagiata Lefèvre, 1891 Metaxyonycha porcata (Germar, 1824) Metaxyonycha problematica (Bechyné, 1951) Metaxyonycha pulchra (Scherer, 1964) Metaxyonycha quadrimaculata (Olivier, 1808) Metaxyonycha quadrinotata Marshall, 1864 Metaxyonycha radioni (Bechyné, 1952) Metaxyonycha richteri (Bechyné, 1953) Metaxyonycha rosiovittata Bechyné, 1949 Metaxyonycha rosiovittata obsoleta (Bechyné & Bechyné, 1968) Metaxyonycha rosiovittata rosiovittata Bechyné, 1949 Metaxyonycha rugosa Jacoby, 1900 Metaxyonycha salvini (Jacoby, 1881) Metaxyonycha sanguinea Lefèvre, 1878 Metaxyonycha schinicola (Bechyné, 1958) Metaxyonycha seabrai (Bechyné & Bechyné, 1968) Metaxyonycha semiocclusa (Bechyné, 1951) Metaxyonycha sergipensis (Bechyné & Bechyné, 1968) Metaxyonycha signata Lefèvre, 1885 Metaxyonycha spinifera (Bechyné, 1957) Metaxyonycha tarsata Baly, 1881 Metaxyonycha tejucana Marshall, 1864 Metaxyonycha tenuenotata (Bechyné, 1950) Metaxyonycha testacea (Fabricius, 1801) Metaxyonycha tetrasticta Marshall, 1864 Metaxyonycha tricolor (Perty, 1832) Metaxyonycha tridentata Jacoby, 1877 Metaxyonycha trigonomera (Bechyné & Bechyné, 1968) Metaxyonycha validicornis Lefèvre, 1885 Metaxyonycha variolosa Jacoby, 1890 Metaxyonycha vianai Bechyné, 1949 Metaxyonycha vigia (Bechyné & Bechyné, 1961) Metaxyonycha violena (Bechyné, 1954) Metaxyonycha viridilimbata Lefèvre, 1877 Metaxyonycha vittulosa (Bechyné, 1951) Metaxyonycha weyrauchi (Bechyné, 1950) Metaxyonycha weyrauchi chaparensis (Bechyné, 1951) Metaxyonycha weyrauchi weyrauchi (Bechyné, 1950)
The following species are synonyms: Metaxyonycha batesi Baly, 1881: Synonym of Metaxyonycha augusta (Perty, 1832) Metaxyonycha formosa Lefèvre, 1883: Synonym of Metaxyonycha augusta (Perty, 1832) Metaxyonycha pretiosa Baly, 1881: Synonym of Metaxyonycha augusta (Perty, 1832)
References