Term
| Three Major Chordata Groups |
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Definition
Urochordata(Turnicates)
Cephalochordata(Lancelets)
Cyclostomata (Hagfish+Lamprey)
No Longer Craniata (hagfish+vertebrata) |
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Term
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Definition
Jawed Vertebrates
- Fishes
- Amphibians
- Reptiles
- Mammals
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Term
| Chordates belong to what clade? |
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Definition
| Chordates are Bilaterian animals and belong to the clade Deuterostomia |
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Term
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Definition
- Pharyngeal Slits
- Notochord
- Hollow Dorsal Nerve Cord
- Muscular, Post-anal tail
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Term
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Definition
| Originally for feeding now for respiration |
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Term
| Notochord Function & Evolution |
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Definition
Longitudinal flexible rod, offers support and protection
Evolution: (In adult vertebrates, remnants of embryonic notochord)
(In humans: intervertebral discs) |
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Term
| Hollow, Dorsal Nerve Cord Evolution |
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Definition
| Evolution: HDN-Central Nervous System (Brain and Spinal Cord) |
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Term
| Muscular, Post-anal tail Function & Evolution |
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Definition
Muscles provides propulsion in aquatic vertebrates
Evolution: +Fins (skeletel elements and muscles) |
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Term
Urochordata
-Other names & notes |
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Definition
- Turnicates or Sea Squirts
- Adults - Sessile Filter Feeders
- Metamorphosis: Larval (Free Swimming to Adult (Attached)
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Term
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Definition
| Changes genes controlling developmental timing |
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Term
Cephalochordata
-Other names and notes |
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Definition
-Lancelets
-Filter Feeders
-Myomeres - Segmented muscles
-Resemble ancestral vertebrate |
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Term
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Definition
| Control development of major regions vertebrate brain |
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Term
| Chordates that have a head... what is its significance? |
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Definition
| -Opened up a completely new way of feeding for chordates: Active predation |
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Term
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Definition
-Jawless and Jawed Vertebrates
-Chordates that have a head
-Includes hagfish, lamprey + Vertebrates |
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Term
Cyclostomata
-Who & Unique fact |
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Definition
-"round Mouth"
-Myxini (Hagish) + Lampreys
-Hagfish and lampreys are the oldest living lineage of vertebrates |
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Term
Cephalaspidomorphi
-Common name and characteristics |
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Definition
Lamprey
-Only true parasitic vertebrate teeth around mouth used to suck blood and flesh
-Cartilage skeleton |
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Term
Myxini
-Common name and characteristics |
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Definition
-Hagfish
-Scavengers
-Jawless
-Lack Vertebrae
-Strictly Marine
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Term
Vertebrates
-Apomorphies & Functions |
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Definition
Apomorphies
-Myoglobin - respiratory pigment in muscles
-Pineal Organ - Detects light, regulates migratory behavior
-Vertebrae (Backbone enclosing spinal cord)
-Bone and Cartilage |
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