Vertebrate Biology Flashcards
Chapter 34
1
Q
phylum chordata subphylums?
A
- urochordata: tunicates
- cephlachordata: lancelets
- vertebrata: agnathans, fish, sharks, tetrapods
2
Q
most ancient and diverse of clade vartebrata?
A
fish
3
Q
class agnatha?
A
- no bone
- 5 to 15 gills
- eggs deposited at sea; direct development
4
Q
lamprey
A
- no bone
- well developed eyes
- 7 pair of gills
- eggs deposited in freshwater, freshwater larva
5
Q
gnathostomes
A
- jawed fish
6
Q
what was the “age of fishes?”
A
devonian fishes
7
Q
class placodermi
A
- extinct; early jaw fish
- bony armor around head
- no true teeth
8
Q
chondricthyes
A
- jaws w/ teeth
- sacles; denticle
- 5 to 7 gills
- spiral valve intesine
- lateral line
- heterocercal tail
9
Q
modern shark feeding types?
A
- planktivores
- carnivores
- parasites (cookie cutter sharks)
10
Q
ovipary
A
eggs enclosed in capsule; laid and hatched outside mother
11
Q
ovovipary
A
give birth to young, eggs develop in uterus
12
Q
vivipary
A
give birth to young, placental connection
13
Q
class osteichthyes
A
- jaws w/ teeth
- bony skeleton
- paired fins
- 4 gill pairs
- simple intestine
14
Q
superorder chondrostei
A
- heterocercal tail
- persistent notochord
15
Q
superorder holostei
A
- single dorsal swim bladder
- vertebral central often at least partly ossified
- modernized jaws
