1 / 21

iv) Bird-Dinosaur

By: Carolina Rodrigo Briones 9A. iv) Bird-Dinosaur. Dinosaur : " terrible lizard “. They are another group classified in the reptiles, but aren’t lizards. (not necessary) Bird-Dinosaur : ___________

shade
Download Presentation

iv) Bird-Dinosaur

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. By: Carolina Rodrigo Briones 9A iv) Bird-Dinosaur

  2. Dinosaur : "terrible lizard“. They are another group classified in the reptiles, but aren’t lizards. (not necessary) Bird-Dinosaur : ___________ *FACT: In the fist half of the 20th century, Scientifics believed dinosaur birds were cold-blooded. Definition of Name

  3. Types: • Pterodactyl ("wingedfinger") • Archaeopteryx("original bird" or "first bird") • Confuciusornis (?) • Dimorphodon(“teeth in two ways") • Pterosauria ("wingedlizard") • Bird species existing: 10-20,000. Species

  4. Confuciusornis Pterodactyl Dimorphodon Pterosaur Archaeopteryx

  5. Confuciusornis: • Lived in the EarlyCretaceousperiod (135 millionyearsago) • Could be found in Asia (specially China) • Had some characteristics with dinosaurs (clawed hands) • No tail (long feathers) • One of the first known birds to have wishbone • Hard beak • Toothless Characteristics

  6. Pterodactyl: • Jurassic Era (155-150 million years ago) • Lived in Europe and Africa • Pterodactyl -> Ptero-Dactyle (Georges Cuvier in 1809) -> Latinized to Pterodactylus (Rafinesque in 1815) • Its name refers to the long finger holding his wing. • Relatively small • Wings (50-75 cm long) • Pointed beak and teeth • Three short claws and a long finer that extended to the wingtip. • Habited in the shores of large lakes (fish) • Long beak and with small teeth helped to catch their prey. CHARACTERISTICS (2)

  7. Dimorphodon: • Lived Mid-Jurassic Era (180-154 million years ago) • Could be found in CentraMexico and England. • Because it ate fish, scientists believe its hair was waterproof. • Its height was usually between 3-4 feet. • Length was 8 feet. (including tail) • Long tail (helped lead the flight) • Large head • Two different types of teeth • Strong but flexible beak • Diet: fish • First fossils found in England, 1828 (Mary Anning) • Named “Dimporphon” by Richard Owen in 1859 (palentologist) CHARACTERISTICS (3)

  8. Pterosaur: • First fossil found by Cosimo Collini in 1784 (Italian naturalist) • Lived during the Mesozoic Era (228-65 million years ago) • Could be found in Africa, Asia, Australia, Europe, North and South America. • Body: • Wings formed by membrane that supported fourth finger. • Whole body covered in hair. • Its jaw was long; rounded tip/end. CHARACTERISTICS(4)

  9. Archaeopteryx: • Lived during early Tithonian Stage of Jurassic Period (150.5-148.5 million years ago) • Roughly size of a Raven. • Broad wings; round at the end • Long tail (compared to body size) • 20 in. length maximum. • Small teeth • Its feathers are similar to modern day bird feathers. • Similar in structure and design • Had also characteristics from theropod dinosaur. CHARACTERISTICS(5)

  10. First fossil of feathered found was in Liaoning, China during the 1990’s. • Had been many discoveries but feathered dinosaurs have been more common. • fossil feathers have roughly the same appearance as the birds fossilized in the area. • In 2012 -> samples of amber • Feathers from 75-80 million years ago (Cretaceous Era) • Some feathers were used for insulation, and not flight. • Complex feathers have variations in coloration, similar to modern birds. Fossil Record

  11. Pterosauruslayed eggs • Leathery egg shell • Eggs were small (like reptiles, unlike birds) • They buried eggs (like turtles or crocodiles) • Helped adaptations: weight reduced • But it limited possible living environments • Dependent on parents for short period of time • (until wings grew) • Could fly as soon as egg hatched reproduction

  12. Warm-blooded; physiology helped stay in the air. • 1st vertebrate to fly • Diet: fish • Plunged in water for fish (e.g. pelicans) • Also ate insects • Soared hundreds of miles on hunting expeditions • Physical: • Very elongated forearms and legs • Long neck; big flat feet • Longer head than body • Bizarre jaw -> long, curved tip Lifecycle(Pterosaur)

  13. Keratinous papillae system (like flamengo’s) • In their mouth -> used for selecting some food types. • Food was rasped against upper teeth until organic pulp was created. • Then, filtered to teeth of lower jaw. • When had enough food to swallow, would tilt its head up and a sphincter at top of throat would open • Food was sent to the esophagus to its stomach. DigestiveSystem(Pterosaur)

  14. Respiratory: • Had similar respiratory system as modern birds. • Required huge amount of oxygen in order to power their large wings. • *could have breathing problems due to long neck. • Abdominal Muscles: • Tightly packed in several internal organs. • When the animal flexed muscles lungs expanded. (e.g.. Catch prey) • Air Sacs: • Relied to provide enough oxygen. • It extended into the interior of the bones • form of tiny tubes pumping additional oxygen • Geochemical and data indicate -> • dinosaurs appeared atmospheric oxygen concentration was half of today’s • Development of avian-type resp. system may been the “key” dinosaur’s evolution success. Respiratory and Circular Systems(Pterosaur)

  15. Circulatory: • Vertical column above heart would require blood pressure • Implications for cardiac size and function led to alternative cardiopulmonary designs. • When young, metabolism went fast but as they reached the adult size metabolism slowed down. • Diminished the load on circulatory system. • Had four chambered hearts. Respiratory and Circular Systems(Pterosaur) (2)

  16. Animals had a massive focculus. (brain region that integrates signals from joints, muscles and skin) • Flocculus send signals so that the eye muscles produce automatic movements. • Pterosaurs' flocculi occupied 7.5% of the animals' total brain mass. • Birds usually do not have large flocculicompared with any other animal (1%-2% total brain mass) • Have so large flocculus due to large wings. (more sensory informartion to process) SensorySystem(Pterosaur)

  17. Diapsid: ("twoarches") • Reptiles (cold-blooded) • Twoholesbehindeacheye • Synapsids: ('fusedarch') • Mammal-like (warm-blooded) – vertebrates/backbone • Single Opening, (“temperal fenestra”) ”skull roof” behind each eye • Synapsid developed from amnoites. • Primitive synapsids– Pelycosaurs • Advanced mammal-like – Therapsids. Skull

  18. Hallow bones only found on dinosaurs and birds. Number of bones and structure of a chicken is very similar to predatory dinosaurs. Feathers are highly evolved scales Evidence of feathery dinosaurs came from China Fun Facts

  19. http://axxon.com.ar/not/152/c-1520148.htm http://elcajondesastre.blogcindario.com/2005/09/00126-terodactilos-gigantes-los-mas-grandes-voladores.html http://en.wikipedia.org/wiki/Archaeopteryx http://www.time.com/time/specials/packages/article/0,28804,2029779_2029777_2029766,00.html http://axxon.com.ar/not/152/c-1520148.htm http://es.wikipedia.org/wiki/Pterodactylus http://dinosaurs.about.com/od/aviandinosaurs3/p/dimorphodon.htm http://www.educar.org/prehistoria/fosiles/Dimorphodon.asp http://www.dinoguia.com/carnivoros/dimorphodon http://es.wikipedia.org/wiki/Dimorphodon http://infodinos.blogspot.com/search/label/volador http://es.wikipedia.org/wiki/Pterosauria http://www.cambridge.org/gb/knowledge/isbn/item5634817/?site_locale=en_GB http://www.ucmp.berkeley.edu/diapsids/pterosauria.html Bibliography

More Related