Abstract
The “canals” in the outer layer of Falconiformes egg-shells, vertically orientated to the shell surface, are remains of the “cleft pattern”, runned through in all birds during the shell-formation, but generally closed in the later developmental stadies.
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Literatur
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Schmidt, W.J. Das wesen der “Kanäle” in den falconiformes-eischalen. Z. Morph. Tiere 62, 1–8 (1968). https://doi.org/10.1007/BF00401487
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DOI: https://doi.org/10.1007/BF00401487