anamniote


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anamniote

a vertebrate whose embryo lacks an AMNION.
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canicula (and other cat shark species) brain was the distinct brain vesicles including an enlarged telencephalon, making its brain structure more similar to that of the amniotes rather than the anamniotes. A possible reason for this could be that when the cat shark hatches they are more developed as they have a longer developmental period compared with anamniotes such as zebrafish or Xenopus and do not have a larval stage.
Development of the early axon scaffold in the rostral brain of the small spotted cat shark (Scyliorhinus canicula) embryo
The vertebrates, for example, are subdivided into amniotes (reptiles, birds, and mammals) and anamniotes (fishes and amphibians) based on whether they possess an amnion--a protective embryonic coveting.
The animal(s) within us: life on Earth took many forms before the emergence of mammals and mankind
Although amphibians are among the most sensitive anamniotes to changes in the external medium, they were able to colonise a wide range of habitats in different environments (Duellman and Trueb, 1994).
Water-balance response of Rhinella arenarum (Hensel, 1867) tadpoles to graduated increase in environmental osmolarity/Resposta de Rhinella arenarum larvae a meio electrolitico e nao electrolitico com aumento escalonado da osmolaridade

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