Convergent Evolution

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duanes

duanes

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Isla Taboga Panama via Milwaukee
https://hosting.photobucket.com/1f4...a20bef120.jpg?width=320&height=320&fit=bounds,
https://hosting.photobucket.com/1f4...9d17b3471.jpg?width=320&height=320&fit=bounds, https://hosting.photobucket.com/1f4...47209ee44.jpg?width=320&height=320&fit=bounds
Above the rheophillic Malagasy cichlid Paretroplus nourissati
Below the Paramanian rheophillic cichlid species Darienheros calobrensis.
IMG_4578.jpeg,
IMG_4583.jpeg,
IMG_3885.jpeg
Another similar species from far south, in S America, Gymnogeophagus sp Paso Pache
https://hosting.photobucket.com/1f4...d82224fb8.jpg?width=320&height=320&fit=bounds, https://hosting.photobucket.com/1f4...ee356e281.jpg?width=320&height=320&fit=bounds,
Another I find fascinating are Etroplus suratensis, spittin images , and also primarily vegetarian, Hero severus.
 
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Another interesting pathway (at least for me) is transitional evolutionary convergence that may be indicated in how the Darienheros (the only species in its genus, with a very restricted and limited range in the Darien) of the isthmus seems to have evolved from the earth eating, shoaling, and rheophillic Geophagines (and their close relatives) in South America into the Cribroheros and Thorichthys earth eating, and shoalong species in Central and North America.
Geophagine above. Darienherios, below
IMG_4666.jpeg
Below represatives of the Cribroheros genus below,
https://hosting.photobucket.com/1f4...70e6c0113.jpg?width=320&height=320&fit=bounds,
 
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