File:Rugh 171.jpg



Stages in the metamorphosis of Rana pipiens

(Stage XI) The margin of the fifth toe is directed toward the tip of the second toe. The third toe usually has a melanophore streak.

(Stage XII) The margin of the fifth toe is directed toward the tip of the first toe. Melanophores often appear on the second toe.

(Stage XIII) The margin of the fifth toe is directed toward the tip of the prehallus.

(Stage XIV) Pigment-free patches appear on the metatarsophalangeal joints, where the proximal toe pads will develop later. About this time the brow-spot appears as a light spot on the mid-line slightly anterior to the level of the eyes. The nasolacrimal duct, developing as a cord of cells between the nostril and eye, is visible through the skin as a light line.

(Stage XV) The proximal toe pads appear.

Historic Disclaimer - information about historic embryology pages

Pages where the terms "Historic" (textbooks, papers, people, recommendations) appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms, interpretations and recommendations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)

Reference

Rugh R. Book - The Frog Its Reproduction and Development. (1951) The Blakiston Company.

Cite this page: Hill, M.A. (2024, April 27) Embryology Rugh 171.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Rugh_171.jpg

What Links Here?

© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G