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Chondrichthyes is a class of jawed fish that contains the cartilaginous fish or chondrichthyans, which all have skeletons primarily composed of cartilage. They can be contrasted with the Osteichthyes or bony fish, which have skeletons primarily composed of bone tissue. Chondrichthyes are aquatic … Meer weergeven
Skeleton
The skeleton is cartilaginous. The notochord is gradually replaced by a vertebral column during development, except in Holocephali, where the notochord … Meer weergevenFertilization is internal. Development is usually live birth (ovoviviparous species) but can be through eggs (oviparous). Some rare species are viviparous. There is no parental … Meer weergeven
• Note: Lines show evolutionary relationships. Meer weergeven
Cartilaginous fish are considered to have evolved from acanthodians. The discovery of Entelognathus and several examinations … Meer weergeven
Wikipedia-tekst onder CC-BY-SA-licensie Kraakbeenvissen - Wikipedia
Kraakbeenvissen (Chondrichthyes) vormen een groep meest in zee levende en vrij zwemmende gewervelde dieren, waarvan het skelet uit kraakbeen bestaat. Daarin onderscheiden zij zich van de beenvisachtigen, die de overgrote meerderheid van de vissen omvat.
Er zijn meer dan 1000 soorten beschreven kraakbeenvissen waaronder ongeveer 400 soorten haaien en 600 soorten roggen en pijlstaartroggen en ongeveer 30 soorten holocephali (zeekatten, c…Wikipedia · Tekst onder CC-BY-SA-licentie- Geschatte leestijd: 2 min.
Chondrichthyan | Definition, Species, & Facts | Britannica
WEBChondrichthyan 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.
Chondrichthyes: kenmerken, typen en voortplanting - Renovables …
WEB6 minuten. De Chondrichthyes (Chondrichthyans), ook wel kraakbeenvissen genoemd, is een groep zeer oude gewervelde waterdieren. Hoewel ze niet zo talrijk of divers zijn als …
Chondrichthyan Evolution, Diversity, and Senses | SpringerLink
WEB24 jan. 2019 · A chapter from a book series on fascinating life sciences, covering the origin, evolution, and diversity of chondrichthyans, the cartilaginous fishes. Learn about the …
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Fish - Sharks, Rays, Chondrichthyes | Britannica
WEBChondrichthyes. : sharks and rays. The earliest sharks (class Chondrichthyes) first appeared in the Early Devonian about 400 million years ago, became quite prominent by …
Chondrichthyan - Cartilaginous Fish, Elasmobranchs, …
WEBTwo extinct chondrichthians. The earliest fossil remains of fishlike vertebrates are too fragmentary to permit tracing the modern fishes precisely to their origins. It is believed that the ancestral forms evolved …
Kraakbeenvissen Chondrichthyes | Nederlands Soortenregister
WEBChondrichthyes: Indeling. Animalia [rijk] Dieren. Chordata [fylum] Gewervelde dieren. Chondrichthyes [klasse] Kraakbeenvissen. In samenwerking met. Ministerie van …
Chondrichthyes - Animalia
WEBChondrichthyes are jawed fish with cartilaginous skeletons, such as sharks, rays, skates and chimaeras. Learn about their characteristics, diversity, evolution and …
Chondrichthyan crisis | Nature Ecology & Evolution
WEB7 okt. 2021 · In just seven years, the fraction of chondrichthyan species that are threatened with extinction has jumped from a quarter to a third. In 2014, the first global assessment …
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