LECTURE9 Vertebrates2.1 - Vertebrates 2 Tetrapods...

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Slide 1 Vertebrates 2 Vertebrates 2: Tetrapods
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Slide 2 Vertebrates 2 Tilman et al. 2006 Growing fuel -- the wrong way, the right way
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Slide 3 Vertebrates 2 Midterm Exam #3 Friday, 7 December Everything through human evolution (26 Nov. lecture) Invertebrate and vertebrate phylogenetic trees are fair game Lecture material / textbook
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Slide 4 Vertebrates 2 Where are we? 1 more online quiz after this week
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Slide 5 Vertebrates 2 I can’t drive to the museum?
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Slide 6 Vertebrates 2 Chordata (subphylum) Craniata Vertebrata Gnathostoma Osteichthyes --- Tetrapoda Classification:
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Slide 7 Vertebrates 2 Chordata (subphylum) Craniata Vertebrata Gnathostoma Osteichthyes --- Tetrapoda Classification: domain kingdom phylum (phyla, pl.) class order family genus species
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Slide 8 Vertebrates 2 Chordate features (review) notochord dorsal hollow nerve cord pharyngeal slits muscular post-anal tail
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Slide 9 Vertebrates 2 Homologous structures in tetrapod limbs 0 QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture.
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Slide 10 Vertebrates 2 Figure 34.20 0 Tetrapod Phylogeny
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Slide 11 Vertebrates 2 Aquatic-Terrestrial Transition During Devonian, plants begin providing organic material at water’s edge Lobe-fins abundant Fossil record shows the transition to land occurred over a 50-million-year period from 400–350 MYA 0
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Slide 12 Vertebrates 2 Acanthostega 0
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Slide 13 Vertebrates 2 Tiktaalik 0 What has the head of a croodile and the gills of a fish? Live  375 m illio n ye ars  ag o Dis c o ve re d in 2006 Is  te c hnic ally a fis h,  c o m ple te  with s c ale  and g ills ,  but has  flatte ne d he ad and  unus ual fins
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Slide 14 Vertebrates 2 Tiktaalik 0
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Slide 15 Vertebrates 2 Rise & Fall of Amphibia Carboniferous: “The Age of Amphibians” Earliest terrestrial tetrapods, amphibians benefit from moist climate, abundant food & relatively little competition Amphibians begin to decline in numbers & diversity during late Carboniferous By Mesozoic (~245 MYA) surviving lineages resemble modern species 0 QuickTime ' and a TIFF (Uncompressed) decompressor are needed to see this picture.
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Slide 16 Vertebrates 2 Class Amphibia 0
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Slide 17 Vertebrates 2 Extinct Amphibians QuickTime ' and a TIFF (Uncompressed) decompressor are needed to see this picture. QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture. Ne c tride a Ais to po da
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Slide 18 Vertebrates 2 Extant amphibians Represented by ~4,800 species Salamanders, order Urodela, “tailed” Frogs and toads, order Anura, “tail-less” Caecilians, order Apoda, “legless” 0
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Slide 19 Vertebrates 2 Urodeles ~500 species, most entirely aquatic, but some terrestrial Salamanders walk with a side-to-side bending of the body that may resemble the swagger of the early terrestrial tetrapods 0
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Slide 20 Vertebrates 2 Anurans ~4,200 spp., more specialized than urodeles for moving on land Use powerful legs to hop along terrain Feed on insects by flicking out sticky tongues
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