A study of the Northwestern tiger salamander, Ambystoma tigrinum melanostictum (Baird), has confirmed a study of the Pacific tree frog, Hyla regilla, that a melanophore-stimulating substance is produced in the infundibulum of the embryo and young larva. In addition, this study has confirmed the observation that this melanophore-stimulating substance can be detected at an earlier stage in the developing embryo than can the melanophore stimulating substance, intermedin, from the adenohypophysis. Project Number 122.
"Melanophore-Stimulating Substances in Amphibia,"
Jackson Hole Research Station Annual Report: Vol. 1963
, Article 12.
Available at: http://repository.uwyo.edu/jhrs_reports/vol1963/iss1/12