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Os condríctios (Chondrichthyes, do grego χονδρος chóndros, "cartilagem", e ιχθύς ichthýs, "peixe") ou peixes cartilagíneos, que incluem os tubarões, as raias e as quimeras, muitas vezes classificadas como Seláceos, são peixes geralmente oceânicos que possuem um esqueleto totalmente formado por cartilagem, mas ...
- Categoria:Chondrichthyes
Páginas na categoria "Chondrichthyes" Esta categoria contém...
- Categoria:Chondrichthyes
Chondrichthyes are aquatic vertebrates with paired fins, paired nares, placoid scales, conus arteriosus in the heart, and a lack of opercula and swim bladders. Within the infraphylum Gnathostomata, cartilaginous fishes are distinct from all other jawed vertebrates.
An egg case or egg capsule, often colloquially called a mermaid's purse, is the casing that surrounds the eggs of oviparous chondrichthyans. Living chondricthyans that produce egg cases include some sharks, skates and chimaeras.
Chondrichthyes or cartilaginous fishes are the sharks and their relatives. They have jaws and paired fins, paired nostrils, scales, two-chambered hearts, and skeletons made of cartilage rather than bone.
It is the sole member of the genus Rhincodon and the only extant member of the family Rhincodontidae, which belongs to the subclass Elasmobranchii in the class Chondrichthyes. Before 1984 it was classified as Rhiniodon into Rhinodontidae. Whale sharks inhabit the open waters of all tropical oceans.
Há 3 dias · Chondrichthyan is the class of fishes that includes sharks, skates, rays, and chimaeras. Learn about their anatomy, distribution, abundance, and conservation status from Britannica's experts.
