Chapter 11 - Sarcopterygians, Reedfish, Bowfin Flashcards

1
Q

Orders of Class Sarcopterygii

A
  • Coelocanthiforms
  • Caertodontiforms
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2
Q

Coelocanthiforms

A
  • last known fossils from 80 mybp
  • rediscovered in Africa, 1930
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3
Q

Coelocanthiforms characteristics

A
  • lobed fins
  • diphycercal tail
  • fat filled swim bladder
  • electrosensitive
  • viviparous
  • gular bone
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4
Q

Order Caeratodontiformes

A

lungfishes

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5
Q

lungfishes distribution

A
  • Australia
  • S. America
  • Africa
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6
Q

Caeratodontiforms characteristics

A
  • paired lungs
  • external gills as juvenile
  • tooth plates on interior bones
  • up to 1m
  • obligate & facultative air breather
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7
Q

Class Actinopterygii orders

A
  • Polypteriforms
  • Acipenseriforms
  • Lepisosteiforms
  • Amiiforms
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8
Q

Order Polypteriformes characteristics

A
  • lobe like pectoral fins
  • specialized dorsal fin
  • ganoid scales
  • paired lungs
  • external gills in young
  • symmetrical tail is internally heterocercal
  • gular bone
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9
Q

Order Acipenseridae

A
  • family Acipenseridae
  • 25 species
  • N. hemisphere
  • anadromous
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10
Q

Acipenseriforms characteristics

A
  • 4 barbels
  • rows of bony scutes
  • long lived
  • large bodies
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11
Q

family Polyodontidae

A
  • paddle fish
  • 2 species
  • long paddle like snout
  • large bodied, long lived
  • spawn oven gravel bars
  • electrosensitive
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11
Q

dorsal fin in Polypteriforms

A

numerous finlets supported by a single spine

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12
Q

2 species of paddlefish

A
  • Yangtze
  • Mississippi
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13
Q

Neopterygians characteristics

A
  • bony fin supports
  • physostomus swim bladder
  • heterocercal tail
  • Holostei & Telostei
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14
Q

Order Lepisosteiforms

A
  • family Lepisosteidae
  • 7 species
  • NA, FW
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15
Q

Lepisosteiforms characteristics

A
  • elongate body
  • ganoid scales
  • large bodied
  • low oxygen waters
  • toxic eggs & larvae
  • air breate via swim bladder
16
Q

Order Amiiforms

A
  • family Amiidae
  • bowfin
  • 1 species, Amia calva
17
Q

Amiiformes characteristics

A
  • Amiiform swimming
  • predatory
  • nest building & parental care
  • sexual dimorphism (coloration)
  • air breathe via swim bladder
18
Q

ohio species Actinopterygii

A
  • lake sturgeon
  • pallid sturgeon
  • shovelnose sturgeon
  • longnose gar
  • shortnose gar
  • paddlefish
  • bowfin