PPT-Origin of Tetrapods, Amphibians and Reptiles

Chapter 34 Never grow a wishbone where your backbone ought to be Clementine Paddleford Origin of Tetrapods First tetrapods diverged 365 million years ago and shallow inland lakes with muddy bottoms likely selected for early . Ron Chakrabarty. Mark . Juhn. Daniel Montgomery. Andrew Tung. Amphibians. Family . Amphibia. Amphibians – General/Unique Characteristics. Moist, glandular skin with no scales. Feet lack claws and are often webbed. Amphibian diversity. Anura. (. frogs, ~4000 sp.); . Caudata. (salamanders, ~450 sp.); . Gymnophiona. (caecilians, ~175 sp.). Skin. permeable. respiration. mucous glands. poison glands. biphasic . lifestyle. Biology 342. Phylogeny . of . Basal . Tetrapoda. The group of bony fishes that gave rise to land-dwelling vertebrates and their descendants (. Tetrapoda. , or colloquially, “. tetrapods. ”) was the lobe-finned fishes, or . Vocabulary. Scaly. : . covered in scales.. Extinct. : . (of a species, family, or other larger group) having no living members.. Flee. : . Run away from a place or situation of danger.. Elongated. : . Phylum: . Chordata. . Subphylum:Vertebrata. Order. Testudines. Rhynchocephailia. Squamata. Crocodilia. Common . example. Turtles and tortoises. Tuataras-found only in New Zealand. Lizards, snakes, and worm lizards. Chapter 34. “Never grow . a wishbone . where your backbone ought to be” . -Clementine . Paddleford. Origin of . Tetrapods. First . tetrapods. diverged 365 million years ago . (________). ________________________and shallow inland lakes with muddy bottoms likely selected for early . Fully adapted for life on land. All Amniotes – produce Amniotic Eggs. Dry, Scaly Skin. Ectothermic . More Efficient Circulatory and Respiratory Systems. Cloaca . Except for snakes, Reptiles have Paired limbs, most ending in 5 clawed toes . Fully adapted for life on land. All Amniotes – produce Amniotic Eggs. Dry, Scaly Skin. Ectothermic . More Efficient Circulatory and Respiratory Systems. Cloaca . Except for snakes, Reptiles have Paired limbs, most ending in 5 clawed toes . Test 2: Amphibians and Reptiles:. Objective 1: Describe the characteristics of Modern Amphibians. Objective 2: Describe characteristics of the following orders: (. Apoda. , . Urodela. , . Anura. ). Give examples of each.. 9-25-17. 1. How does a vertebrate differ from an invertebrate?. A. A vertebrate eats only vegetables. B. All vertebrates are warm blooded. C. All vertebrates can fly. D. All vertebrates have a backbone. Fully adapted for life on land. All Amniotes – produce Amniotic Eggs. Dry, Scaly Skin. Ectothermic . More Efficient Circulatory and Respiratory Systems. Cloaca . Except for snakes, Reptiles have Paired limbs, most ending in 5 clawed toes . Amphibians and Reptiles Class Amphibia Amphibia =Double Life Frogs, toads, salamanders, and caecilians ~6000 species Skin with mucoid secretions, lack epidermal scales, feathers or hair Larvae are usually aquatic and Characteristics of Class Amphibia. Most amphibians. are . tetrapods. , meaning they have . four limbs. , but . some are limbless. .. Amphibians have . smooth, moist skin. .. Amphibians . respire by lungs, skin, and gills;. chiridium. = muscular limb with digits. Derived . from Crossopterygian ancestors; . Tetrapods. . first appear in the fossil record toward the end of the Devonian (. ~. 360 mya. ).. First . Tetrapods.