Subphylum of Chordata Flashcards
What are the subphylum?
Urochordata, Cephalochordata, and Vertebrata
What does Urochordata mean?
tail cord
What organism is in Urochordata
tunicates/sea squirt
What does Cephalochordata mean?
head cord
What organism is in Cephalochordata?
lancelets and Amphioxus
What does Vertebrata mean?
backboned
What organism is in Vertebrata?
vertebrates
What has
-Notochord and nerve cord in free swimming larva only
-ascidian adults sessile & encased in tunic
Urochordata
What has:
-notochord, nerve cord, pharyngeal slits, end-style, & post anal tail that persist throughout life
-fishlike form
Cephalochordata
What has:
-bony or cartilaginous vertebrae surrounding spinal cord
-notochord in embryonic stages, persisting in some fishes
Vertebrata
What is the habitat of Cephalochordata?
-all marine
-sandy bottoms of coastal waters
What is the reproduction of Cephalochordata?
Dioecious with External fertilization
Cephalochordata have
-no heart
what is the reproduction of Urochordata?
Monoecious with internal & external fertilization
What is the habitat of Urochordata
-all marine, found in all seas from shallow to deep water
