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Phylum
Chordata
3 Subphyla
Subphylum UrochordataSubphylum CephalochordataSubphylum
Vertebrata
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Subphylum
Urochordata
AdultHas only 1 Chordate characteristic:
Pharyngeal gill bars have become a filter feeding basket
LarvaHas all 4 Chordate characteristics
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Subphylum
UrochordataTunicate tadpole larvae
Note 4 chordate characteristics:
1. Dorsal hollow nerve cord
2. Notochord3. Pharyngeal gill
slits or bars4. Post-anal tail
(A)
A
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Post anal tail
Metapleural FoldsPharyngeal gill bars & slits
Notochord
AnusAtriopore
Cirri
Nerve cord
Subphylum
Cephalochordata
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Dorsal region Note: fin ray (A), myomeres (B), dorsal hollow
nerve cord (nerve tube) (C), notochord (D)
D
A
B
CB
Phylum
ChordataSubphylum
Cephalochordata
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Anterior region Note: (D) pharynx, (E) endostyle –(produces
mucus to help catch food in between the gill bars - Yummy!) (MF) -
Meta pleural folds (A) atrium
O
OB
B
B
B
B
C
C
C
CD
E MFMF
A
Ovary P. gill bar
P gill slit
Endostyl e
Phylum
ChordataSubphylum
Cephalochordata
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Phylum
ChordataSubphylum Vertebrata
7 Classes -Agnatha Hagfish & LampreysChondrichthyes
SharksOsteichthyes Bony fishAmphibia Frogs &
SalamandersReptilia Turtles & CrocsAves BirdsMammalia Your lab
partner!
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Phylum ChordataSubphylum Vertebrata
TYPES of SKELETON
Cartilaginous Skeleton (2 classes)AgnathaChondrichthyes
Bony Skeleton (5 classes) Osteichthyes ‘RAAMO’AmphibiaReptilia
AvesMammalia
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Phylum ChordataSubphylum Vertebrata
NUMBER OF HEART CHAMBERS
AgnathaChondrichthyesOsteichthyes
AmphibiaReptilia (except crocs)
CrocsAvesMammalia
2
3
4
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Phylum ChordataSubphylum Vertebrata
WHO HAS AN AMNIOTIC EGG?
Amniotes – ‘RAM’ReptiliaAvesMammalia
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Always take the shortest route……If you can’t remember all the
classes that are ectothermic… just remember those that aren’t!
Endothermic Aves Mammalia
Endothermy – ability to maintain body temperature by internal
metabolic processes
Phylum ChordataSubphylum Vertebrata
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Don’t forget the dissections…….and all those special little
structures
Slide Number 1Slide Number 2Slide Number 3Slide Number 4Slide
Number 5Slide Number 6Slide Number 7Slide Number 8Slide Number
9Slide Number 10Slide Number 11Slide Number 12
