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Phylum
Chordata
3 Subphyla
Subphylum UrochordataSubphylum CephalochordataSubphylum Vertebrata
Subphylum
Urochordata
AdultHas only 1 Chordate characteristic:
Pharyngeal gill bars have become a filter feeding basket
LarvaHas all 4 Chordate characteristics
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
Post anal tail
Metapleural FoldsPharyngeal gill bars & slits
Notochord
AnusAtriopore
Cirri
Nerve cord
Subphylum
Cephalochordata
Dorsal region Note: fin ray (A), myomeres (B), dorsal hollow nerve cord (nerve tube) (C), notochord (D)
D
A
B
CB
Phylum
ChordataSubphylum
Cephalochordata
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
Phylum
ChordataSubphylum Vertebrata
7 Classes -Agnatha Hagfish & LampreysChondrichthyes SharksOsteichthyes Bony fishAmphibia Frogs & SalamandersReptilia Turtles & CrocsAves BirdsMammalia Your lab partner!
Phylum ChordataSubphylum Vertebrata
TYPES of SKELETON
Cartilaginous Skeleton (2 classes)AgnathaChondrichthyes
Bony Skeleton (5 classes) Osteichthyes ‘RAAMO’AmphibiaReptilia AvesMammalia
Phylum ChordataSubphylum Vertebrata
NUMBER OF HEART CHAMBERS
AgnathaChondrichthyesOsteichthyes
AmphibiaReptilia (except crocs)
CrocsAvesMammalia
2
3
4
Phylum ChordataSubphylum Vertebrata
WHO HAS AN AMNIOTIC EGG?
Amniotes – ‘RAM’ReptiliaAvesMammalia
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
Don’t forget the dissections…….and all those special little structures
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