Evoluci n de las Aves - PowerPoint PPT Presentation

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    1. Evolucin de las Aves

    2. Quiz (1) Identifique los nombres de al menos dos fsiles descubiertos en China relacionados con la evolucin de las aves (1) Identify the names of at least two fossils discovered in China related with bird evolution

    3. (2) Seale la opcin que incluye las dos teoras principales del origen de las aves: (2) Pick the option that includes the two main theories about the origin of birds: Origen Thecodonto o Crocodiliano Thecodont or Crocodilian origin Origen Thecodonto o Theropodo Thecodont or Theropod origin Origen Theropodo u Ornithomimido Theropod or Ornithomimid origin Origen Theropodo u Ornithischio Theropod or Ornithischid origin

    4. (3) Verdadero o Falso / True or False: (a) Las aves son dinosaurios. Birds are dinosaurs. (b) Los Enantiornithes dieron origen a las aves modernas. The Enantiornithes gave origin to modern birds. (c) Archaeopteryx careca de plumas. Archaeopteryx lacked feathers. (d) Existieron dinosaurios con plumas. There were feathered dinosaurs. (e) Todos los Archosauria con plumas podan volar All Archosauria with feathers were able to fly.

    5. (4) Explique, que es la Paradoja Temporal en relacin al origen de las aves? (4) Explain, what is the Temporal Paradox in relation to the origin of birds?

    6. Evolucin de las Aves

    7. Similitud con Reptiles Thomas Huxley mediados 1800s Un cndilo occipital Forma del tarso Huevo polarizado Escamas queratinizadas Hembras heterogamticas Globulos rojos nucleados

    8. Archaeopteryx Descrito en 1861 Origen de las especies de Darwin (1859) 145 ma Perodo Jursico Antes de las plantas con flor Antes que el T. rex

    9. Plumas asimtricas Garras curvas en las patas Sin msculos cupracoracoides (hombro) Mandbulas con dientes Garra retractil en el segundo dedo Cola larga con huesos

    19. Thecodontes dieron origen a los cocodrilos, dinosaurios, & pterosaurios

    32. Teora Clsica (Heilmann) del Origen de las Aves Thecodonto Basal Arbreo Plumas 1o. Vuelo 2o. Aislamiento Trmico Ms antiguo que Archaeopteryx

    33. Teora de Ostrom del Origen de las Aves Ancestro Coelurosaurio Theropodo Corredor Plumas 1o. Aislamiento Trmico 2o. Volar Tiempo similar a Archaeopteryx

    47. Late Jurassic Birds Liaoningornis Sympatric with Confuciusornis Skull / Bill Pygostyle Synsacrum Furcula Air sacs & Ribs Keel Pectoral girdle Fused hands / arms

    50. Two Major Bird Lineages Enantiornithes Fusion of tarsometatarsus in opposite order Most Diverse avian group in Cretaceous Worldwide distribution Ornithurae

    53. Non-Passerine Radiation Fossils vs. Extant Phylogenies Presbyornis Shorebirds (gulls, sandpipers)

    55. Large Carnivorous Birds Gastornis / Diatryma Europe / NA Australian Dromonithids Giant Demon Duck of Doom Terror Birds South America Far from sympatric Chicken sized terror birds in same german shale as gastornis. Terror birds were top predators . . . South america only place with top birds, mammals elsewhere. Saber-tooth cats may have outcompeted after connection with north america. Stayed on as scavengers in south america until just before the arrival of humans. Really fast.Chicken sized terror birds in same german shale as gastornis. Terror birds were top predators . . . South america only place with top birds, mammals elsewhere. Saber-tooth cats may have outcompeted after connection with north america. Stayed on as scavengers in south america until just before the arrival of humans. Really fast.

    56. Pseudodontorns 17 wingspans, false teeth17 wingspans, false teeth

    57. Teratorns 25 foot wingspan, 170 lbs.25 foot wingspan, 170 lbs.