BIO211H5 Chapter Notes -Agnatha, Dorsal Nerve Cord, Pikaia

92 views4 pages
16 Jan 2012
School
Department
Course

Document Summary

Is an extinct genus of anomalcaridid which are closely related to the arthropods. y y the first super predator y aquatic y. Branchiostama y small vaguely eel or snake-like animals are close relatives of vertebrates y they do not have a true head(with a skull capsule, eyes, nose, a well-developed brain etc. ), but merely a mouth adjacent to the gill-slits, with the slightly enlarged anterior end of the dorsal nerve cord above and in front of them y aquatic y. Astraspis is an extinct genus of primitive jawless fish. They are supposed to have had a mobile tail covered with small protective plates y y y aquatic y ordovician. Eriptychus is a genus of armoured, fossil jawless vertebrates, Jawless vertebrate y y y aquatic y ordovician. Is an extinct species of jawless fish y y oldest known vertrabrate y aquatic y ordovician.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related textbook solutions

Related Documents

Related Questions