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