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Figure Caption/Comments:

Image description by: Paula Mabee and Nathan Bird

Anatomical structures shown: parhypural, hypurals 1-5, hemal arches and hemal spines of preural centra 1 and 2, neural arches of preural centra 1 and 2, notochord, lepidotrichia, actinotrichia

Stage: larval, 5.8mm SL* (~13 d) *SL (Standard Length) refers to the distance from the tip of the snout (upper or lower jaw, whichever is most anterior) to the posterior edge of the hypurals

Genetic (background) strain: unknown

Genotype: unknown

Animal state: fixed

Labeling: Alcian blue for cartilage, Alizarin red for bone

Description: Image showing skeletal development within the caudal fin of a larval zebrafish, 5.8mm SL. The parhypural and hypural 1, which form initially as independent condensations (see hypural1.jpeg), fuse proximally. Preural centra 1 and 2 and the urostyle are not ossified at this point. Scale bar = 0.1mm, arrows = hypurals 1-5, * = parhypural, arrowheads = hemal spines (ventral to notochord) or neural arch (dorsal to notochord)

Figure Data:
Anatomy Terms: hemal spine , hypural , parhypural
Developmental Stage:
Days 7-13
Preparation Image Form View Direction
whole-mount still parasagittal anterior to left