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These are the lecture slides of Introduction to Biology. Key important points are: Tunicates, Phylum Chordata, Characteristics of Chordates, Tunicate Larvae, Adult Tunicate, General Features Shared by Chordates, Styela Montereyensis, Subphylum Urochordata, Free Swimming Larva
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Subphylum Urochordata
Subphylum Cephalochordata
Subphylum Vertebrata
tunicates lancets Agnathans Fish Sharks tetrapods
1 st^ fish
Proto-vertebrate
Tunicate larvae Adult tunicate
lancelet
Pikaia Burgess Shale Fauna Cambrian 540-500 mya
Early Chordate ancestor may have given rise to 1 st^ vertebrate
Phylum Chordata
Subphylum Urochordata - Tunicates
Subphylum Urochordata = tunicate
Tunicate - also called 'sea squirt'
into sessile adult
asexual (budding)
Oikopleura
Jelly-like house
Marine snow
Class Larvacea - Gelatinous house, planktonic
Subphylum Cephalochordata
lancet