Amniota
National Institutes of Health
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The evolutionary history of the human heart is fascinating and highly relevant to an understanding of congenital heart disease…
A BSTRACT — We document dorsal vertebrae and neural spine fragments of a small specimen of Dimetrodon , NMMNH P-57872, from the…
— A general rationale for the formulation and placement of taxonomic denitions in phylogenetic taxonomy is proposed, and…
The conditions of sex differentiation observed inTorpedo ocellata and inScillyorhinus canicula are more similar to those of…
THERE comes a time in the life of every normal child when a realization of its individuality forces certain problems upon its…
Considerable literature has accumulated dealing with observed cases of malformations resulting from arrest of development of the…
Einleitung (S. 293). Amphioxus (S. 294). Petromyzon (S. 296). Selachier (S. 302). Ceratodus (S. 308). Urodelen (S. 310). Anuren…