Urochordata Flashcards
1
Q
Urochordata General Info
A
Tunicates
Cambrian stage 3 to recent
Sessile filter feeders + predators
Mobile larvae with notochord + tail + gill slits + dorsal nervous cord (DNC)
Major metamorphosis out of chordate features
2
Q
Cephalochordata - lancelets + amphioxi
A
Recent - very long ghost lineage (pre - cam)
Has DNC + notochord + gill slits + post anal tail
Cephalization
3
Q
Craniata
A
Maybe vertebrata? - depends on the hagfish
Cambrian stage 3 to recent
All traits of basal chordates
V or W muscle bundles + brain + brain case + paired sensory organs + neural crest (only during development)
Higher degree of cephalization than lancets
