What is Pharyngula?
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"Pharyngula" is a term coined by William Ballard to describe a particular stage in the development of the vertebrate embryo.
You may have heard that embryos go through a blastula stage, then a gastrula stage, then a neurula…pharyngula is next in the series. At the pharyngula stage, the vertebrate embryo is at the phylotypic stage, an evolutionarily conserved period when vertebrate embryos of all species are most similar to one another.
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