What are the classes of the superclass Agnatha?
Living jawless fishes are represented by approximately 84 species divided between two classes: Myxini (hagfishes) with about 43 species and Cephalaspidomorphi (lampreys) with 41 species (Figures 26-3 and 26-4).
What level of classification is Agnatha?
|Agnatha Temporal range: Cambrian Stage 3–Present,|
Is Agnatha a class or superclass?
agnathan, (superclass Agnatha), any member of the group of primitive jawless fishes that includes the lampreys (order Petromyzoniformes), hagfishes (order Myxiniformes), and several extinct groups.
What is the main characteristic of superclass Agnatha?
Key Features of Agnatha Jaws are absent. Paired fins are generally absent. Early species had heavy bony scales and plates in their skin, but these are not present in living species. In most cases the skeleton is cartilaginous.
What type of consumers are Agnatha?
what type of fertilization do agnathans exhibit? What type of consumers are lampreys? Parasitic.
What are some examples of Agnatha?
Jawless fish/Lower classifications
Why is Agnatha considered primitive?
As the most primitive members of the vertebrates, agnathans differ from all others in several important respects. First, they lack hinged upper and lower jaws and instead have unhinged circular mouths. They also lack the paired appendages (fins or limbs) that are found in other vertebrates.
Is Agnatha a phylum?
ChordateJawless fish / Phylum
Which of the following is characteristic feature of Agnatha?
So, the correct answer is ‘Presence of suctorial mouth, absence of jaws, presence of single nostril and unpaired fins’. Was this answer helpful?
Which of the following is the example of super class Agnatha?
So, the correct answer is ‘Petromyzon’.
Why are Agnatha considered primitive?
What is an example of Agnatha?