An ontology for the development and anatomy of Amphioxus (Branchiostoma lanceolatum).
Amphioxus Development and Anatomy Ontology (AMPHX)
fertilized egg: time since fertilization is 0min, corresponding to 0.00% of development
initiation of asynchronous cell division
invaginated vegetal pole, mesendoderm does not touch ectoderm
cap shaped, mesendoderm touches ectoderm
vase shaped, due to body elongation during blastopore closure
neural plate, just before blastopore closure
8-9 somite pairs, prior to schizocoelic somite formation
12 somite pairs, tailbud shape, enlarged pharyngeal region
13 somite pairs, mouth and pre-oral pit anlagen, first pigment spot
gill slit row starts to duplicate, hepatic caecum starts to develop
adult-like morphology, length of less than 3cm
adult-like morphology, length of more than 3cm
diploid cell produced by fusion of sperm cell nucleus and egg cell
cell of the embryo, before the formation of germ layers is complete
cell located at the animal pole of the embryo, of small size
cell located at the vegetal pole of the embryo, of big size
cell located at the animal pole of the embryo, before gastrulation starts
cell located at the vegetal pole of the embryo, before gastrulation starts
external cell layer of schizocoelic somite pair