Search results
Results from the WOW.Com Content Network
Body shape: Body deep, rather compressed; head flattened above, tapering to vertically rounded, blunt snout (Hardy 1978). ... Historical changes in the ichthyofauna ...
The exceptional diversity of species, adaptations, and life histories observed in the Neotropical ichthyofauna has been the focus of numerous books and scientific papers, especially the wonderfully complex aquatic ecosystems of the Amazon Basin and adjacent river basins (e.g., Goulding and Smith, 1996; Araujo-Lima and Goulding, 1997; Barthem ...
A fish (pl.: fish or fishes) is an aquatic, anamniotic, gill-bearing vertebrate animal with swimming fins and a hard skull, but lacking limbs with digits.Fish can be grouped into the more basal jawless fish and the more common jawed fish, the latter including all living cartilaginous and bony fish, as well as the extinct placoderms and acanthodians.
What links here; Related changes; Upload file; Special pages; Permanent link; Page information; Cite this page; Get shortened URL; Download QR code
Indirect evidence for endothermy is provided by the body shape of derived ichthyosaurs, which with its short tail and vertical tail fin seems optimised for a high cruising speed that can only be sustained by a high metabolism: all extant animals swimming this way are either fully warm-blooded or, like sharks and tuna, maintain a high ...
Iguanodectes rachovii is a small fish, reaching a maximum of 6.2 cm (2.4 in) standard length (SL). [2] It has an elongate body shape, and is generally quite slender, as is the case in all Iguanodectes; before it was properly understood as its own species, it was temporarily referred to as the "slender Tetragonopterus".
They had a movable joint between armour surrounding the head and body. As the lower jaw moved down, the head shield moved, allowing for a larger opening. All arthrodires, save for Compagopiscis , lacked teeth, and used instead the sharpened edges of a bony plate, termed a "tooth plate," as a biting surface ( Compagopiscis had true teeth in ...
The brain of this superfamily is one of the largest among fishes and has a body-proportional size comparable to that of humans, [31] with a brain-to-body mass ratio ranging from 1/52 to 1/82, and possibly associated with the ability to interpret bioelectrical signals. [32]