Question

List some of the characteristics of the members of the members of the Class Petromyzoniformes (Lampreys)

Answer 1

Lampreys are included in the order Petromyzoniformes. The chracteristics are as follows:

• Adults have the body like eel,without scales and lack paired fins, moouth is like funnel and sucking in nature.
• They have cartilaginous skeleton with a series of structure known as arcualia which is situated above notochord.
• They have large eyes and one nostril which is situated on top of the head accompanied by seven gill pores.
• The pharyx get subdivided and ventral part used to form a respiratoy tube which get isolated from mouth.