;"Sibling 1";"Sibling 2";;"M. occidentale";"M. heterochirus";"M. americanum";"M. carcinus"
"American slope";Pacific;Atlantic;Pacific;Atlantic
Distribution;"Mexico to Panama";"USA (Florida) to Brazil (Rio Grande do Sul)";"Mexico (Baja California) to Peru";"USA (Florida) to Brazil (Rio Grande do Sul)"
Habitat;"wide range of altitudes  (more common in higher elevations of the rivers)";"wide range of altitudes (more common in medium and higher courses of the rivers"
Reproduction;"require brackish water for reproduction (extended larval development with numerous and small eggs)";"require brackish water for reproduction (extended larval development with numerous and small eggs)"
Morphology;"very similar and just a few morphological details better seen in adult males are useful characters to separate both species";"very similar and present few distinct morphological characters"
References;"Holthuis 1952, Mejía-Ortiz et al. 2001, Rocha and Bueno 2004, Almeida et al. 2008, Lara 2009, Villalobos-Hiriart et al. 2010, Lara and Wehrtmann 2011, García-Guerrero et al. 2013, Pileggi et al. 2013";"Holthuis 1952, Choudhury 1971, Monaco 1975, Bowles et al. 2000, Mejía-Ortíz et al. 2001, Hernández et al. 2007, Valencia and Campos 2007, Almeida et al. 2008, Lara 2009, Pileggi and Mantelatto 2010, Lara and Wehrtmann 2011, García-Guerrero et al. 2013"