Chimaera - Wikipedia
Chimaeras are soft-bodied, shark-like fish with bulky heads and long, tapered tails; measured from the tail, they can grow up to 150 cm (4.9 ft) in length. Like other members of the class Chondrichthyes, chimaera skeletons are entirely cartilaginous, or composed of cartilage.
Chimaeras - The Neglected Chondrichthyans
Among other features, they are characterized by: a gill cover over the four gills, leaving a single opening on each side of the head; the palatoquadrate (upper jaw) is usually fused to the cranium; no spiracle opening behind the eye; branchial (gill) basket mostly beneath the neurocranium (posterior part of the cranium that encases the brain ...
Chimaeras - Anatomy, Characteristics, Classification, & Picture
2024年8月27日 · Unlike sharks with multiple teeth that are constantly replaced, chimaeras have ever-growing, permanent tooth plates. These plates are arranged in three pairs, with one pair at the lower jaw and the other two along the upper jaws. All the teeth plates collectively form a protruding, beak-like structure that helps crush and grind their food.
Holocephali - Wikipedia
Chimaeriformes, commonly known as chimaeras, rat fish, or ghost sharks, include three living families and a little over 50 species of surviving holocephalans. These fishes move by using sweeping movements of their large pectoral fins. They are deep sea fish with slender tails, living close to the seabed to feed on benthic invertebrates.
Chimaera - The Shark Trust
In Greek mythology the ‘Chimaera’ was a monstrous fire-breathing hybrid creature. Chimaera are closely related to sharks, skates and rays. But they diverged from their shark relatives around 400 million years ago. They differ from sharks as they have: Upper jaws that are fused to their skull; 4 gills with one external opening
Chimaera | Definition & Facts | Britannica
chimaera, (subclass Holocephali), any of numerous cartilaginous fishes related to sharks and rays in the class Chondrichthyes but separated from them as the subclass (or sometimes class) Holocephali. Like sharks and rays, chimaeras have cartilaginous skeletons, and the males possess external reproductive organs (claspers) derived from the ...
Description of the chimaerid jaw and its phylogenetic origins
Embryological analyses of the chimaerid jaw and cranium are presented to provide an anatomical description of the palatoquadrate in modern chimaerids. The palatoquadrate fuses, anteriorly, to the nasal capsule early in development. This marks the first point of contact between the mandibular arch and cranium.
Chimaera – Classification, Behaviour, Diet and More - Animal …
2023年10月16日 · Chimaeras, scientifically classified under the order Chimaeriformes, represent an intriguing branch of cartilaginous fish. Unlike their more well-known relatives, sharks and rays, Chimaeras possess distinct characteristics, including elongated bodies, large pectoral fins, and venomous spines.
Chondrichthyes: Chimaeriformes - Palaeos
Callorhinchus, Chimaera, Harriotta, Hydrolagus, Rhinochimaera. Range: from the Middle Jurassic (Patterson, 1965) or Late Carboniferous (Carroll, 1988), based on Similihariotta. Phylogeny: Chimaeriformes: Myriacanthoidei + *.
Chimaera – "OCEAN TREASURES" Memorial Library
Chimaeras (keye-meer-uh) are cartilaginous fish related to the sharks & rays are sometimes called Ghost Sharks, Rabbitfish or Ratfish. Chimaeras live in temperate ocean floors down to 2,600 meters (8,500 feet) deep, with few occurring at …