Chondrichthyes Flashcards by sneha Unknown

In vertebrate they come under ___ and under super class ____
(Chondricthyes)

Gnathastomata (w jaws)
Pisces bear (fins)

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Habitat
Chondrichthyes

Marine

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Body
Chondrichthyes

Streamlined w cartilagenous endoskeleton

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Mouth
Chondrichthyes

Ventral

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Notochord fate
Chondrichthyes

Persistent throughout life

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Chondrichthyes
Gill slits

Separate without operculum(gill cover)

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Skin of chondrichthyes

Tough w minute placoid scales

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Chondrichthyes Teeth are modified w
And directed towards

Placoid scales
Backward

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Are chondrichthyes predaceous

Yes

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Presence of air bladder in chondrichthyes?
Consequences

No
Swim continuously

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Heart of chondrichthyes

2 chamb

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Electric organs present in

Torpedo
Chondrichthyes

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Poison string in

Trygon (sting ray)

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Blood of chondrichthyes

Cold (poikilothermous)

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Reproduction in chondrichthyes

Dioecious
Internal fert
Viviparous

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Chondrichthyes
In males, pelvic fins bear

Claspers

Scoliodon

Dog fish
Chondrichthyes

Pristis

Saw fish

Carcharodon

Great white fish

Trygon

Sting ray
Chondrichthyes