Sample name | Developmental stage | Main morphological characteristics |
---|---|---|
T1 | Big yolk plug | The formation of large yolk plug: |
About 32Â h after fertilization, the embryo develops into yolk plug period: blastopore endodermal cells are still externally exposed at the vegetal pole, formation of a large yolk plug inserted in the germ ring, at this time the animal is very bright yellow and the plant polar pigmentation is very deep. | ||
T2 | Wide neural plate | Obvious wide neural plate divided into both internal and external parts: about 45Â h after fertilization, there is apparition of an obvious wide neural plate; around the neural plate in the head region, there is a clear shaped horseshoe formation; the neural plate grows longitudinally and is divided into inner and outer parts; in the center of the neural plate grows a longitudinal neural groove. |
T22 | 64-day-old fish with electrical receptors ganglion | Fully developed bone plate, 14–16 dorsal spines, 45–47 lateral bone plates, 7–9 abdominal bone plates. Presence of ampullary organs on the ventral face |