WebChondrichthyes ( / kɒnˈdrɪkθi.iːz /; from Ancient Greek χόνδρος (khóndros) 'cartilage', and ἰχθύς (ikhthús) 'fish') is a class that contains the cartilaginous fishes that have skeletons primarily composed of cartilage. They can be … WebThey are a part of the phylum Echinodermata and are related to sand dollars, sea urchins, and sea cucumbers. Echinoderms are found in nearly all marine habitats and constitute a major proportion of the biomass. Starfish belong to the class Asteroidea, derived from the Greek words “aster” (a star) and “eidos“ (form, likeness, appearance).

Difference Between Fish and Reptile

Fish, as vertebrata, developed as sister of the tunicata. As the tetrapods emerged deep within the fishes group, as sister of the lungfish, characteristics of fish are typically shared by tetrapods, including having vertebrae and a cranium. Early fish from the fossil record are represented by a group of small, jawless, armored fish known as ostracoderms. Jawless fish lineages are mostly extinct… WebPhoto of Paedocypris progenetica by Sophia (CC BY-NC-ND 3.0); whale shark photo by Julie Edgley (CC BY-SA 2.0). The cyprinid fish (8mm) and the whale shark (12m) are … interview date for us visa in nepal

Biology HESI Flashcards Quizlet

WebFun Facts. The order Tetraodontiformes (Latin for "four teeth") is a group of more than 300 fish species that includes sunfishes, spike fishes, leatherjackets, boxfishes, puffers, and … WebApr 3, 2024 · arthropod, (phylum Arthropoda), any member of the phylum Arthropoda, the largest phylum in the animal kingdom, which includes such familiar forms as lobsters, crabs, spiders, mites, insects, centipedes, and … WebAll four living classes of fishes and the three subclasses of Osteichthyes were established by the mid-Devonian. Many species of fish that lived during the Devonian are now extinct. Bony fishes continued to evolve after the Devonian period. Most modern orders of bony fishes probably evolved during the Triassic period, about 200 million years ago. newham magistrates court