logo

Video encyclopedia

Chondrostei

1:04

How To Say Chondrostei

0:10

How to Pronounce chondrostei - American English

0:14

How to pronounce chondrostei

2:31

Superorder Chondrostei Acipenser

0:10

What does chondrostei mean

Chondrostei are primarily cartilaginous fish showing some degree of ossification. It is thought that the cartilaginous condition is derived, and that the ancestors of this group were bony fish with fully ossified skeletons. Members of this group share with the Elasmobranchii certain features such as the possession of spiracles, a heterocercal tail and the absence of scales. Nevertheless, the fossil record suggests they have more in common with the teleosts. The Chondrostei is probably a paraphyletic grouping; the fifty-two living species are divided among two orders, the Acipenseriformes, and the Polypteriformes.
    Explore contextually related video stories in a new eye-catching way. Try Combster now!
    • Characteristics 

    • Taxonomy 

    • Classification