Term
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Definition
Extinct
Oldest jawed vetebrates (~440 mya)
Rows of paired ventral fins
Most had scales but not armor |
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Term
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Definition
Extinct
Coexisted w/ Acanthodii (~350-415 mya)
Covering of bony plates
Pectoral fin encased in armor
Paired pectoral & pelvic fins |
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Term
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Definition
| ~1200 spp Common during Devonian Lack swim bladder Spiracles Tooth whorl Males have claspers (modified pelvic fin) |
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Term
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Definition
~30 spp
Bottom dwellers
Marine
Eat invertebrates |
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Term
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Definition
"Bony fish"
Endochondral bone
Appeared just before Devonian (~420 mya) |
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Term
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Definition
| Pectoral and/or pelvic fin(s) have long, muscular lobes containing series of bony elements that link the fin to the girdle |
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Term
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Definition
6 extant spp
Anterior vascularized outpocketing of the gut for holding air - evolved into swim bladder |
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Term
| Infraclass Tetrapodomorpha |
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Definition
Extinct
Active predators in shallow waters
Powerful pectoral fins
Reduced fin rays
Eyes near top of head
Still had gills |
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Term
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Definition
Coelacanths
Bottom-dwellers (100-300 m)
Eat fish & squid |
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Term
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Definition
"Ray-finned fish"
Fins attached to body by bony rays
~32,000 spp
Present but uncommon during Devonian |
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Term
| Infraclass for Sturgeons & Paddlefish |
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Definition
Specialized forms
Most of skeleton is cartilaginous
Sturgeon: ~25 spp; largest extant freshwater fish; highly protrusible bottom-oriented mouth
Paddlefish: 2 spp; filter-feeders |
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Term
| Infraclass Neopterygii (Gars & Bowfin) |
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Definition
Gars: 7 extant spp; cylindrical bodies w. hard, interlocking scales & elongate jaws
Bowfin: 1 spp |
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Term
| Infraclass Neopterygii (Teleosts) |
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Definition
Advanced bony fish
Highly maneuverable w/ paired fins & symmetrical tail fins
Moveable premaxila & maxila |
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