Mecynogea is a genus of orb-weaver spiders first described by Eugène Simon in 1903. The name is derived from the Greek mekyno (μηυνω), meaning "to lengthen", and "gea" (γεα), meaning "earth".

Species it contains nine species in the Americas: Mecynogea apatzingan Levi, 1997 – Mexico Mecynogea bigibba Simon, 1903 – Brazil, Uruguay Mecynogea buique Levi, 1997 – Brazil Mecynogea erythromela (Holmberg, 1876) – Brazil, Paraguay, Argentina, Chile Mecynogea infelix (Soares & Camargo, 1948) – Colombia, Brazil Mecynogea lemniscata (Walckenaer, 1841) – USA to Argentina Mecynogea martiana (Archer, 1958) – Cuba, Hispaniola Mecynogea ocosingo Levi, 1997 – Mexico Mecynogea sucre Levi, 1997 – Venezuela, Brazil

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