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Deuterostomes and Chordates 1. BIOL 1407. Deuterostomes. Phylum Echinodermata Sea stars, sea urchins, sea cucumbers, crinoids Phylum Chordata Tunicates, lancelets, fishes, amphibians, reptiles, birds, mammals. Phylum Echinodermata. Phylum Echinodermata. Larvae: bilateral symmetry

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deuterostomes
Deuterostomes
  • Phylum Echinodermata
    • Sea stars, sea urchins, sea cucumbers, crinoids
  • Phylum Chordata
    • Tunicates, lancelets, fishes, amphibians, reptiles, birds, mammals
phylum echinodermata1
Phylum Echinodermata
  • Larvae: bilateral symmetry
  • Adults: pentaradial symmetry
  • Photo credit of pluteus larva: NOAA, 2001
  • Photo credit of adult brittle star: Larry Zetwoch, 1989, Florida Keys National Marine Sanctuary, NOAA
water vascular system
Water Vascular System
  • Unique
  • Hydraulic system used for feeding and locomotion
  • Video of tube feet: http://www.youtube.com/watch?v=sMgfZj3DsXY&feature=related
  • Photo Credit: Dr. James P. McVey, NOAA Sea Grant Program
characteristics of chordates
Characteristics of Chordates
  • Bilateral symmetry
  • Triploblastic
  • Coelomate
  • Segmented
other chordate characteristics
Other Chordate Characteristics
  • Complete Digestive System
  • Closed Circulatory System
  • Respiratory System: Gills or Lungs
  • Excretory System: Kidneys
  • Centralized Nervous System
major chordate clades
Major Chordate Clades
  • Craniates: Cranium
    • Vertebrates + Hagfishes
  • Vertebrates: Vertebral Column
    • Gnathostomes: Jaws & Paired Appendages
    • Osteichthyans: Lung/Lung Derivatives
    • Lobe-finned Fishes: Limb Bone Pattern
    • Tetrapods: Four Well-Developed Limbs
    • Amniotes: Amniotic Egg
hagfishes
Hagfishes
  • Craniates
  • Head
  • Simple cranium
  • Not vertebrates
characteristics of vertebrates
Characteristics of Vertebrates
  • Vertebral Column
  • Well-developed skull
  • Photo Credit of Hippo skull: Raul654, 2005, Wikimedia Commons
lampreys
Lampreys
  • Vertebrates
  • No jaws or paired appendages
chondrichthyes
Chondrichthyes
  • Cartilaginous skeleton
  • Jaws Present
  • Paired Appendages
osteichthyans
Osteichthyans
  • Bony Skeleton
  • Lung and Lung Derivatives
  • Two Main Groups:
    • Ray-finned
    • Lobe-finned
ray finned fishes
Ray-Finned Fishes
  • Fins are supported by fin rays
  • Swim bladders
  • Largest vertebrate group
lobe finned vertebrates
Lobe-Finned Vertebrates
  • Fins and limbs supported by internal bones and muscles
lobe fin pattern
Lobe-Fin Pattern

Photo Credit: Courtesy of Dennis Murphy, Devonian Times, http://www.devoniantimes.org/opportunity/tetrapodsAnswer.html

slide36
Video of Fish with Fingers: http://www.pbs.org/wgbh/evolution/library/03/4/l_034_03.html
the end

The End

Unless otherwise specified, all images in this presentation came from:

Campbell, et al. 2008. Biology, 8th ed. Pearson Benjamin Cummings.