Evolutionary Novelty and Atavism in the Semionotus Complex: Relaxed Selection during Colonization of an Expanding Lake.

  • Amy Reed McCune
  • Published 1990 in
    Evolution; international journal of organic…


Fishes of the genus Semionotus diversified in the rift lakes of eastern North America during the Mesozoic (Newark Supergroup). Like the well-known cichlid fishes of the African great lakes, diverse complexes of semionotids were apparently endemic to a number of different lakes. Semionotid fishes show considerable morphological diversity in body shape and in… (More)
DOI: 10.1111/j.1558-5646.1990.tb04280.x


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