|1 | Contraction | View Movie
Contraction in Cheiracanthium mildei, side view. Elapsed time 6 hr. Movie courtesy of Bryce Cragg ’08.
|2 | Animation | View Animation
Top of germ disc has been removed and cells are visible along cut edge. Top of yolk is dark blue. Cells ingress through the blastopore onto the yolk mass. Internalized cells become mesendoderm (yellow) or cumulus (red). Animation courtesy of Tony Moreno.
|3 | Canonical | View Movie
Normal development of Cheiracanthium mildei from nuclear division through hatching. Cumulus migrates to the left. Elapsed time 6.6 days. Movie courtesy of Christine Bates ’10 and Marion Burrill ’09.
|4 | Cumulus in Zygiella | View Movie
Cumulus formation and migration (gastrulation I) in Zygiella. Cumulus cells are colored red; some cells that will ingress during gastrulation II are in different colors. Cells were traced frame-by-frame, but movie shows one-hr intervals only. Posterior down. Elapsed time 20 hr. Movie courtesy of Emily Vance ’05.
|5 | Primitive Plate in Zygiella | View Movie
Primitive plate formation (gastrulation II) in Zygiella. Some ingressing cells are colored. Movie starts at cumulus formation and runs through gastrulation II. Cells were traced frame-by-frame, but movie shows one-hr intervals only. Posterior down. Elapsed time 24 hr. Movie courtesy of Emily Vance ’05.
|6 | Gast I, II, III | View Movie
Gastrulation I, II, and III (Stages C–H) in Zygiella. Note movement of internalized cells from center to periphery during gastrulation II. Cumulus migrates toward lower left. Elapsed time 45 hr. Movie courtesy of Emily Vance ’05.
|7 | Inversion in Zygiella | View Movie
Inversion in Zygiella. Note that the rows of leg sockets move away from each other. Elapsed time 54 hr. Movie courtesy of Crystal Chaw ’02.
|Steatoda, very early development | View movie.
A, Only yolk globules are visible early. B, some nuclei (red arrowheads) become visible.
Video stills and movie courtesy of Christine Bates ’10.
|( Visit the spider development research page. )|
|Ensatina pharyngula | View movie.
Still from a realtime movie of an Ensatina pharyngula, about a month old. Note enormous yolk sac with vitelline vessels. The embryos regularly rock back and forth at this stage. Development to hatching is said to take about 6 months.
|( Visit the salamander development research page. )|
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