Amphibian Research Group, Univ of Newcastle
21 hr 30 min: gastrula 22 hr: gastrula 22 hr 15 min: dorsal lip
(arrow) of late gastrula
23 hr: neural fold 23 hr 15 min: neural fold      23 hr 30 min: neural fold 23 hr 45 min: neural fold 24 hr: closing neural fold 24 hr 15 min: closing neural fold
 
Lim. tasmaniensis embryonic development at 23°C Time=21 hr 30 min-24 hr 15 min PI).
Sequence of developmental stages in Lim. tasmaniensis embryos maintained at 23°C between 21 hr and 25 hr Post Insemination (PI).  The smaller cells of the gastrula (Stage 11-12) become layers of tissue i.e. endoderm, ectoderm and mesoderm.  A neural plate forms, closes over and fuses.  All times are post-insemination.
Scale bar: 1 mm