|
Image description by: Charles Kimmel
Anatomical structures shown: posterior lateral line primordium and underlying tissues
Stage: prim-12 (28h)
Genetic (background) strain: none given
Genotype: none given
Animal state: live
Labeling: none; DIC optics
Description: The posterior lateral line primordium, and underlying structures along the flank of the pharyngula. Left side Nomarski views, dorsal to the top, anterior to the left. The lateral line primordium (p), outlined by arrows, is in focus most superficially. The right-most arrow shows its posterior, leading, boundary that we use to obtain the prim stage. Out-of-focus transverse myosepta are visible. They mark off myotomes 10 and 11, that fill most of the field, and the anterior-most part of myotome 12, present to the far right. Myotome 12 underlies the leading edge of the lateral line primordium, hence the embryo is at the prim-12 stage (28h). The embryo is slightly tipped so that the focus at the top of the field is more superficial, and the focal plane to the bottom is deeper. At the top, periderm cells are present. These flattened cells, developing from the EVL, have a characteristic cobblestone appearance, with their most superficial face uplifted into fine folds or rugae. The star shows one of two mesenchymal cells present in the ventral part of the field. They lie deep to the periderm, as does the primordium itself.
| Preparation | Image Form | View | Direction |
| whole-mount | still | parasagittal | anterior to left |