Pleomere

Concerning digestive system development in embryos and marsupial mancae, the following morphological features of ectodermal digestive tract formation have been reported: (i) the invaginated stomodeum is discernible and hindgut invagination is evident between pleomere 6 and telson in mid-stage embryos (stage 6), (ii) the foregut and hindgut are fused in late embryos (stage 16), (iii) the cuticular masticatory apparatus, primary and secondary filters are present in the stomach of late embryos (stage 18), (iv) the hindgut is clearly partitioned into the anterior chamber and papillate region in late embryos (stage 18) and (v) the alimentary canal with a pronounced typhlosole is fully developed in marsupial mancae […]