BIOL 1030 Lecture Notes - Lecture 12: Amniote, Tetrapod, Salamander

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 1030
• Professor: Steven Whyard, Steven Harris

Document Summary

Concept 34. 4: tetrapods are gnathostomes that have limbs. One of most signi cant events in vertebrate evolutionary history was when ns of some lobe- ns evolved into the limbs and feet of tetrapods. Tetrapods have some speci c adaptations: four limbs, and feet with digits, a neck, which allows separate movement of the head, fusion of the pelvic girdle to the backbone. The absence of gills (except some aquatic species: ears for detecting airborne sounds. Tiktaalik, nicknamed a shapod, shows both sh and tetrapod characteristics. It had: fins, gills, lungs, and scales, ribs to help it breathe air and support its body, a neck and shoulders, fins with the bone pattern of a tetrapod limb. Amphibians (class amphibia) are represented by about 6,150 species, divided into 3 clades. Salamanders (order urodela) are amphibians with tails some are aquatic, while others live on land as adults or.