Reptile Evolution. Origin of derivatives. Ancestral reptile = anapsid , small, legs out to sides. A brief look at Classification. “Old view” = Amphibians give rise to reptiles, reptiles give rise to birds and mammals phyletic patterns.
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Origin of derivatives
“Old view” = Amphibians give rise to reptiles, reptiles give rise to birds and mammals
Shoulder girdle inside shell, which is ribs and vertebrae!!
But has a notch at back which serves the same purpose, accommodate the jaw muscles.
In snakes, one opening, and extra hinges in jaw.
Plus crocodiles, and bird ancestry.
Means young often considered different species from adults.