Zoogeography of the Aquatic Fauna of the St. Johns River System with Comments on Adjacent Peninsular Faunas

@article{Burgess1978ZoogeographyOT,
  title={Zoogeography of the Aquatic Fauna of the St. Johns River System with Comments on Adjacent Peninsular Faunas},
  author={George H. Burgess and Richard Franz},
  journal={American Midland Naturalist},
  year={1978},
  volume={100},
  pages={160}
}
The Florida peninsula has been subjected to ~e r iod ic marine inundations and regressions since the Oligocene. Freshwater organisms presently found in the St. Johns River system were derived from stocks that remained on offshore islands during the "Wicomico" ( +100 f t ) high stand, or from immigrants that subsequently entered the Oklawaha River from a Santa Fe River region refugium as sea levels dropped. Elements of the latter fauna have relict distribution in some of the streams in the… 

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