rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Molecular systematics and biogeography of the New World turtle genera Trachemys and Kinosternon
  name:
    name part: Starkey, David Edward.
    role:
      role term: creator
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: xx
    date issued: 1997
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xii, 149 leaves : illustrations ; 28 cm.
  abstract: The order Testudines has evolved to include a diverse array
  abstract: of taxa that inhabit freshwater, marine, and terrestrial
  abstract: ecosystems. The most widely accepted classification scheme
  abstract: divides the turtles into two suborders: Pleurodira and
  abstract: Cryptodira. These suborders are further divided into 13
  abstract: families with 88 genera and 256 species. Extensive
  abstract: morphological diversity among turtles has led to a vast array
  abstract: of hypothesized phylogenies based on a wide variety of
  abstract: methodologies, however no current phylogeny is universally
  abstract: accepted. The present study addresses turtle relationships
  abstract: using mitochondrial DNA sequence data. Over 230 taxa
  abstract: representing all extant families were examined for a total of
  abstract: 250,000 basepairs. The mtDNA data support much of the
  abstract: previous research i.e., monophyly of turtle families and a
  abstract: basal diversification into Pleurodires and Cryptodires.
  abstract: However, hypothesized sister relationships between snapping
  abstract: and big headed turtles and either the Old World pond turtles
  abstract: or tortoises and the New World pond turtles are not evident.
  abstract: Instead, the sequence data supports a close relationship
  abstract: between the Old World pond turtles and tortoises. A novel
  abstract: finding of this study is a delineation between a primitive
  abstract: (Trionychidae and Carettochelyidae) and an advanced clade
  abstract: (all remaining families) within the Cryptodira. Finally,
  abstract: the biogeography of the broadly distributed New World
  abstract: families Kinosternidae and Emydidae was examined. These two
  abstract: groups were chosen because of the potential insights they may
  abstract: bring to the biogeography of this region. Each family has
  abstract: had North America proposed as their point of origin and,
  abstract: although this study confirms the Emydidae as North American,
  abstract: Central America is confirmed as the point of origin for the
  abstract: Kinosternidae. The radiation of the Emydid genus Trachemys
  abstract: across North, Central, and South America and the Caribbean
  abstract: appears to have occurred rapidly >10 million years ago. The
  abstract: I<inosternidae appear to be much older and migrated northward
  abstract: and southward out of Central America and Mexico. This
  abstract: migration resulted in two expansions into North America and
  abstract: two separate expansions into South America.
  note: by David Edward Starkey.
  note: Vita.
  note: "Major Subject: Genetics".
  note: Issued also on microfiche from University Microfilms Inc.
  note: Includes bibliographical references: pages 113-131.
  note: Ph. D. Texas A&M University 1997.
  subject:
    topic: Major genetics
  identifier: 97-29279 UMI
  identifier: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  record info:
    record content source: TXA
    record creation date: 971124
    record change date: 20190325093448.0
    record identifier: in00001394220