Term
| derived characters of chordates |
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Definition
| notochord, dorsal nerve cord, pharyngeal slits, muscular post-anal tail |
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Term
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Definition
| flexible rod between digestive tube and nerve cord; provides support (replaced by skeleton) |
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Term
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Definition
| from ectoderm, becomes central nervous system |
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Term
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Definition
- for suspension feeding (invertabrates)
- gas exchange (aquatic vertabrates)
- ear/head/neck (terrestrial vertabrates)
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Term
| cephalochodates (lancelets) |
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Definition
| have key traits during as larvae and maintain when adults |
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Term
| urochordates (turnicates) |
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Definition
| has key characters as larvae only |
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Term
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Definition
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Term
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Definition
| cells near dorsal edge that migrate to form skull |
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Term
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Definition
- marine scavengers
- cartilaginous skull (no jaws)
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Term
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Definition
| lampreys and gnathostomes |
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Term
|
Definition
- more elaborate skulls
- backbone
- fins stiffened by fin rays
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Term
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Definition
| freshwater (larvae) and marine (adults) |
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Term
| what type of vertabrae to lampreys have? (describe) |
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Definition
| simple vertabrae: cartilage surrounds notochord |
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Term
|
Definition
| condrichthyans and osteichthyans |
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Term
|
Definition
- jaws
- enhanced sensory systems
- paired fins
- mineralized skeleton
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Term
| what structures did jaws form from? |
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Definition
| two pairs of skeletal rods |
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Term
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Definition
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Term
what type of skeleton do chondricthyans have?
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Definition
primarily cartilage
(ancestors were bony) |
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Term
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Definition
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Term
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Definition
- body skeleton
- swim bladder
- aquatics breathe w/ gills
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Term
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Definition
- fins supported by flexible rays (bony spines)
- most diverse group
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Term
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Definition
| coelacanth, lungfish, tetrapods |
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Term
| key characteristic of lobe-fins |
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Definition
| muscular pectoral and pelvic fins |
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Term
|
Definition
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Term
|
Definition
- 4 limbs w/ feet and digits
- neck evolves
- no gil slits past embryo stage
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Term
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Definition
| salamanders, frogs, and caecilians |
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Term
|
Definition
- moist skin
- lungs for gas exchange
- mostly external fertilization
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Term
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Definition
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Term
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Definition
- amniotic egg
- less permeable skin
- ribcage ventilares lungs
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