http://angelenamangieri.weebly.com/class-osteichthyes.html WebClass Chondrichthyes - cartilagenous fishes characterized by: • paired nostrils • skeleton completely cartilagenous with no endoskeletal bone ... • long hind limbs developed for saltatorial locomotion • vocal cords well developed • ear modified for reception of airborne sound waves Order Gymnophiona (Apoda) - caecilians
Chondrichthyes Locomotion Selachii Batoidea - ResearchGate
WebOct 19, 2024 · Chondrichthyes is a class of jawed fishes having a cartilaginous skeleton. The class includes a diverse group of fishes including sharks, rays, skates and chimaeras. They are mostly … One of the primary characteristics present in most sharks is the heterocercal tail, which aids in locomotion. Body covering. Chondrichthyans have tooth-like scales called dermal denticles or placoid scales. Denticles usually provide protection, and in most cases, streamlining. Mucous glands exist in some species, as … See more Chondrichthyes is a class that contains the cartilaginous fishes that have skeletons primarily composed of cartilage. They can be contrasted with the Osteichthyes or bony fishes, which have skeletons primarily composed of See more Fertilization is internal. Development is usually live birth (ovoviviparous species) but can be through eggs (oviparous). Some rare species are viviparous. There is no parental care … See more • Note: Lines show evolutionary relationships. See more • Taxonomy of Chondrichthyes • Images of many sharks, skates and rays on Morphbank See more Skeleton The skeleton is cartilaginous. The notochord is gradually replaced by a vertebral column … See more Cartilaginous fish are considered to have evolved from acanthodians.The discovery of Entelognathus and several examinations of acanthodian characteristics indicate that bony fish evolved … See more • List of cartilaginous fish • Cartilaginous versus bony fishes • Largest cartilaginous fishes • Threatened rays • Threatened sharks See more robert e wood watercolor paintings
Pisces: Characteristics, Classification & Examples - Collegedunia
WebChondrichthyes is divided into two subclasses; of which Elasmobranchii includes skates, rays, and sharks. Skates are the most diverse elasmobranch group, comprising over 20% of the known species. ... This form of locomotion performed by the skate is being explored as a possible origin for our own development of walking by looking for similar ... WebMovement/ Locomotion. - Well defined muscle groups allow for complex move. -Maintain their position in the water by swimming, or use their fat-filled liver to reduce their density. … WebCartilaginous fishes, the sharks, rays and chimaeras (class Chondrichthyes), are a very old and successful group of jawed fishes that currently contains between 900 and 1100 known living species. Chondrichthyians show a high morphological diversity during most of their evolutionary career from the Paleozoic to the present day. They are relatively large … robert e young