" Rio Grande (Bravo) and Soto la Marina drainage systems in northeastern México wihthold two different but closely related cichlid species, namely Herichthys cyanoguttatus and Herichthys carpintis. The distance between northern and southern affluents of these rivers is no more than 5 km. away, although a small geographical accident lays between them. This article explores how is the change in appearence between the two species, is there an abrupt or gradual change between them? How far how they radiated in evolutive terms? "
Classification: Distribution and conservation.
Document with the content of the reference
Reference in bibliography for species (1)
de la Maza Benignos, Mauricio. 2005. "Abrupt Change vs Moderate Graduality in a Transition Zone: From Herichthys cyanoguttatus to H. carpintis (The Search for the Missing Link)". The Cichlid Room Companion (crc02253) (abstract)