Evidence of a rudimentary colon in the elasmobranch, Leucoraja erinacea

@article{Theodosiou2012EvidenceOA,
  title={Evidence of a rudimentary colon in the elasmobranch, Leucoraja erinacea},
  author={Nicole Alexandra Theodosiou and Alyssa Simeone},
  journal={Development Genes and Evolution},
  year={2012},
  volume={222},
  pages={237-243}
}
The transition from aquatic to terrestrial life presented tetrapodamorphs with the challenge of maintaining water homeostasis and preventing desiccation on land. The colon evolved in terrestrial vertebrates to help maintain fluid balance. Although marine elasmobranchs lack a colon, their spiral intestine contains a subregion that histologically appears to… CONTINUE READING