Bio 335 lab midterm exam - Study guides, Class notes & Summaries

Pacific Hagfish ORDER MYXINIFORMES • Gill pouches may open separately to outside, or by a common opening. • Sensory barbels on nostrils and mouth. • Single nostril opens into mouth, unlike that of lampreys. Water can enter the pharynx through the-nostril as well as the mouth. • Rudimentary eyes (lampreys have well-developed eyes). • One semicircular canal in inner ear (a synapomorphy for the group). • No paired fins, no dorsal or anal fin (although there is a dorsal and anal ...