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fish
The vertebrates have a nebulous starting point. There are some chordates that have more of a notochord than a true vertebrate column. Some taxicologists are more comfortable saying that a Coelacanth has a notochord rather than a vertebrate column when clearly the vertebrate are present in this animal.
So its is a matter of your own definition. One could say 'at a stretch' that the hagfish and lamprey are the most ancient vertebrates.
What else can I help you with?
What is the most ancient group of verbrates?
The most ancient group of vertebrates is generally considered to be jawless fish, particularly those in the class Agnatha, which includes lampreys and hagfish. These creatures first appeared over 500 million years ago and are characterized by their lack of jaws and paired fins. Their evolutionary significance lies in their primitive features, which provide insight into the early development of vertebrates.
What is the most diverse group of vertebrates?
Bony Fishes
What group of vertebrates is most related to birds?
Reptiles
What is the most familiar vertebrate group?
Mammals are most familiar vertebrates .
The most primitive vertebrates are members of the group of?
a) jawless fishes.
What is the smallest group of vertebrates?
mammals are the smallest group of vertebrates
Which group of vertebrates has the most variety colour?
The rainbow XD lol
What group of vertebrae is most closely related to birds?
The group of vertebrates most closely related to birds are probably the dinosaurs.
Why amphibians is the most succeful terrestrial vertabrate?
No , no , Amphibia is not most successful group of land vertebrates .It is least successful .
Which group of vertebrates do humans belong to?
The vertebrate group in which humans belong to is the mammal group.Humans belong to the Mammal group.
Are crabs vertebrates or in vertebrates?
They are qualified as invertebrates and belong to the group of arthropods or crustaceans
What largest group used to classify living things?
Vertebrates and non-vertebrates.
