Chapter 11 - Sarcopterygians, Reedfish, Bowfin Flashcards
1
Q
Orders of Class Sarcopterygii
A
- Coelocanthiforms
- Caertodontiforms
2
Q
Coelocanthiforms
A
- last known fossils from 80 mybp
- rediscovered in Africa, 1930
3
Q
Coelocanthiforms characteristics
A
- lobed fins
- diphycercal tail
- fat filled swim bladder
- electrosensitive
- viviparous
- gular bone
4
Q
Order Caeratodontiformes
A
lungfishes
5
Q
lungfishes distribution
A
- Australia
- S. America
- Africa
6
Q
Caeratodontiforms characteristics
A
- paired lungs
- external gills as juvenile
- tooth plates on interior bones
- up to 1m
- obligate & facultative air breather
7
Q
Class Actinopterygii orders
A
- Polypteriforms
- Acipenseriforms
- Lepisosteiforms
- Amiiforms
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
9
Q
Order Acipenseridae
A
- family Acipenseridae
- 25 species
- N. hemisphere
- anadromous
10
Q
Acipenseriforms characteristics
A
- 4 barbels
- rows of bony scutes
- long lived
- large bodies
11
Q
family Polyodontidae
A
- paddle fish
- 2 species
- long paddle like snout
- large bodied, long lived
- spawn oven gravel bars
- electrosensitive
11
Q
dorsal fin in Polypteriforms
A
numerous finlets supported by a single spine
12
Q
2 species of paddlefish
A
- Yangtze
- Mississippi
13
Q
Neopterygians characteristics
A
- bony fin supports
- physostomus swim bladder
- heterocercal tail
- Holostei & Telostei
14
Q
Order Lepisosteiforms
A
- family Lepisosteidae
- 7 species
- NA, FW
