Über die Beeinflussung frühester Entwicklungsstufen von Amphibien durch Organsubstanzen

Deutsch, Josef

doi:10.1007/bf02079097

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Chapter XIII the Endocrine Glands1

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1927

1957

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Cited by 8 publications

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“…Thyroid extracts have no effect upon the segmentation of the egg (Deutsch, 1924) or upon the very early larva. A certain amount of differentiation must have taken place before the thyroid hormone is able to act in the dramatic manner first described by Babak (1913) and Gudernatsch (1913).…”

Section: Chapter XIII the Endocrine Glandsmentioning

confidence: 86%

The biology of the amphibia /

Noble¹

1931

851

320

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of the centrum, although the basidorsal and usually the basiventral are represented by cartilages. The pleurocentrum (interdorsal and interventral) may remain unossified, forming the cartilaginous joint between the successive vertebrae, or the greater part may ossify as the "ball" of the centrum. If this ball attaches itself to the vertebra anterior to it, the vertebra is procoelous; if to the one behind, it is opisthocoelous.Phyllospondyli.-Contemporaneous with the Embolomeri there occurred in both Europe and America a group of small Amphibia which were apparently destined to give rise to the frogs and salamanders at a later period.These were the Phyllospondyli (Fig. 4) as represented by Eugy-rinus in Lancashire, England, and Pelion in the Pennsylvanian of Linton, Ohio (Romer, 1930). Pelion retained such

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Section: Chapter XIII the Endocrine Glandsmentioning

confidence: 86%