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Fig. 3 | BMC Evolutionary Biology

Fig. 3

From: A comparative view of early development in the corals Favia lizardensis, Ctenactis echinata, and Acropora millepora - morphology, transcriptome, and developmental gene expression

Fig. 3

F.lizardensis embryonic development. (a-f) illustrate successive stages of development with micrographs of wholemounts. (g, g*)-(l, l*) are paired images of single embryos, with the oral wholemount view above and the vertical section or side view (k*) below. (a) Egg. (b-e) The developing embryo undergoes successive stages of cell division while maintaining a basically spherical structure. (f) Cell division has continued as the embryo begins to flatten. (g, g*) At this stage the embryo consists of a spheroidal blastula containing a large blastocoel (bl). (h, h*) Gastrulation has begun, with presumptive endoderm moving into the blastocoel (bl). (i, i*) A wide blastopore (asterisk in this and succeeding panels) is now apparent in the wholemount and yolk-laden endoderm (en, in this and succeeding panels) fills the shallow bowl formed by the ectoderm (ec, in this and succeeding panels). (j, j*) The embryo begins to assume a more rounded shape. (k, k*) Wholemount blastoporal and side views. (l, l*) In this planula the blastopore (now the oral pore) is much less apparent, and the section reveals that the planula has elongated and the oral ectoderm is bending axially to form the pharynx (p). Scale = 100uM

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BMC Ecology and Evolution

ISSN: 2730-7182

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