The Origin of Vertebrate Gills
Elsevier (Cell Press)
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Gillis, J., & Tidswell, O. (2017). The Origin of Vertebrate Gills. Current Biology, 27 (5), 729-732. https://doi.org/10.1016/j.cub.2017.01.022
Pharyngeal gills are a fundamental feature of the vertebrate body plan . However, the evolutionary history of vertebrate gills has been the subject of a long-standing controversy [2-8]. It is thought that gills evolved independently in cyclostomes (jawless vertebrates-lampreys and hagfish) and gnathostomes (jawed vertebrates-cartilaginous and bony fishes), based on their distinct embryonic origins: the gills of cyclostomes derive from endoderm [9-12], while gnathostome gills were classically thought to derive from ectoderm [10, 13]. Here, we demonstrate by cell lineage tracing that the gills of a cartilaginous fish, the little skate (Leucoraja erinacea), are in fact endodermally derived. This finding supports the homology of gills in cyclostomes and gnathostomes, and a single origin of pharyngeal gills prior to the divergence of these two ancient vertebrate lineages.
chondrichthyan, development, endoderm, evolution, gills, homology, pharyngeal arch, skate, vertebrate
This research was supported by a Royal Society University Research Fellowship ( UF130182 ) and a grant from the University of Cambridge Isaac Newton Trust ( 14.23z ) to J.A.G. O.R.A.T. was supported by the Wellcome Trust (PhD studentship 109147/Z/15/Z ) and the Cambridge Commonwealth Trust.
WELLCOME TRUST (109147/Z/15/Z)
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External DOI: https://doi.org/10.1016/j.cub.2017.01.022
This record's URL: https://www.repository.cam.ac.uk/handle/1810/263307
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