PPT-Phylogeny of Birds – Class Aves

Birds first appear unambiguously in the fossil record in the Jurassic 150 mya First bird is Archaeopteryx Transitional form between reptiles and modern birds Possessed reptilian skull with teeth long bony tail and claws on digits but had feathers just like modern birds. . About 9,000 species of . birds. are in the . class Aves. ..   Bird classification is based on beak and foot types, and some habitats and behaviors. . Birds of prey have notched beaks and sharp talons. . Phylogenies. The process of evolution produces a pattern of relationships between species. . As . lineages evolve and split and modifications are inherited, their evolutionary paths diverge. . This . - based on whole genome data. Johanne Ahrenfeldt . Research Assistant. Overview. What is Phylogeny and what can it be used for. S. ingle . N. ucleotide . P. olymorphism (SNP) methods. - . snpTree. . Systematics. Phylogeny. Phylon. = tribe, . geny. . = genesis or origin. The evolutionary history of a species or a group of related species.. Investigating the Tree of Life. Phylogeny: the evolutionary history of a species or group of species. Investigating the Tree of Life. Legless lizards have evolved independently in several different groups. Figure 26.1. Phylogeny. is the evolutionary history of a species or group of related species. For example, a phylogeny shows that legless lizards and snakes evolved from different lineages of legged lizards. Birds are reptile like animals that maintain a constant. internal body temperature. . They have an outer covering of feathers, 2 legs that . are covered with scales and front limbs modified. into wings.. Tandy Warnow. The University of Illinois at Urbana-Champaign. Brief history. We met in 1992, when I was working in the Discrete Algorithms Group at Sandia National Labs.. I moved to the University of Pennsylvania in 1993, then to the University of Texas at Austin in 1999. No papers yet. Feathers – insulation and flight. 1. . Modified scales that help regulate body temperature.. 2. . Structure . and variety varies from bird to bird.. Structure Types. . Contour – Covers the body, wings and tail. Section 1.3. Learning Goals. We are exploring modern classification of species using phylogeny.. We are learning to use phylogenetic trees to identify common ancestors.. Modern Taxonomy. traditional classification grouped species according to morphology (body, shape, size and other structural features) . Objective. SWBAT explain and demonstrate that organisms share many conserved core processes and features that evolved and are widely distributed among organisms today.. Agenda. Chapter 25 Quiz. Chapter 26 notes: sections 26.1, 26.2, and 26.3. . . &. Nick Zorn. Class Aves. A. round . 10,000 living . species. Largest number of species out of all . Tetrapods. Adaptations of birds:. Hollow Bones. Beaks. Feathers. Wings . Order . Sphenisciformes. cat sized in Pangea—climate warm, no ice caps. Herbivores. Size—Most dinosuars are big. Spinosaurus a huge aquatic dinosaur. Making a model of Spinosaurus—15 meters long. What are the selective advantages . Native Hawaiian Birds Project 1 By Jordan and Kako http://www.bird- friends.com/pics/ papane Purpose of Our Experiment On the basis of teeth, claws on fingers, tail vertebrae and hand bones, class Aves is divided into two sub-classes . TWO SUB-CLASSES OF CLASS AVES . Sub-class . Archaeornithes. Sub-class Neornithes .