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18 Cards in this Set
- Front
- Back
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Locomotion |
- Fish --> Fins - Bird --> Wings - Tetrapod --> Limbs |
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Two Factors |
- Paired Fins or Paired Limbs - The Girdles |
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Fins of Fishes |
- Membranous or Wet structures - Have fins rays that increase strength of fins - Fin Rays in Bony Fish (Lepidotrichia) - Dermal Fin Rays (Ceratotrichia) |
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Origin of Paired Fins |
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Two Different types |
Archipterygial Fins - Symmetrical Axis Metaterygial Fins - Asymmetrical Axis |
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Theories |
- Gill/Arch
- Fin/Fold |
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Agnathan (Basal Craniates) |
Lacked Jaw 2 Groups - Living & Extinct - Hagfish & Lamprey |
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Ostracoderms (Most Extinct) |
Armored, Jawless Fish - Date back to the Cambrian - Disappeared in the Devonian |
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Placoderms (Extinct) Bony Fish |
1st appeared in Cilorian Period Extinct group of powered jaws, fins & pectoral girdle |
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Chondrichthyans (Cartilaginous Fish) |
Living, divided into subclasses - Elasmobranchi & Holacephali - Sharks, Skates & Sawfish 5-7 pairs of gills Placoid scales |
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Acanthodians (Extinct) |
Early Jawed armored fish Bony armor & head covered by Dermal Plate Contain both bone & cartilage Ex: Telostomi |
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Osteichthyes (Bony Modern Fish) |
No Cartilage Mast majority of bony fish today - 45 orders --> 435 Families = 28,000 species Subclasses: - Ray Thin Fish (Actiknopterygians) - Lobe Thin Fish (Sacroptoygians) |
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Tetrapods: 4 Limbed Vertebrates |
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Extinct & Living |
Amphibians, Reptiles, Mammals & Birds |
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Evolved lobed finned fishes |
390 Million years ago - Devonian Period |
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Different features |
Girdles & Limbs became stronger Pectoral girdle no longer attached to skeletal system Pelvic plates - Ishiopubic plates |
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3 Distinct Anatomical Areas |
Carpas, Metacarpas & Digits |
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Auto Podium |
Distinct part of tetrapod's Limbs (Hand & Feet) |
