chimaera


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chimaera

(kĭmēr`ə), cartilaginous marine fish, related to the sharks. Also called ratfishes, chimaeras are found in temperate oceans throughout the world, mostly in deep water. They have large heads, long, thin, ratlike tails, and large, fanlike pectoral fins. In many species there is a poison spine in front of the first dorsal fin. Their slippery skins are black, gray, or silver, often with stripes or spots. The largest reach a length of about 6 1-2 ft (2 m). Chimaeras resemble sharks in certain fundamental respects: They have cartilage skeletons, males have claspers for internal fertilization of females, and females lay eggs encased in leathery cases. However, they resemble the bony fishes in having the upper jaw fused to the skull, the gill slits opening into a single chamber, a bony covering, or operculum, over the gill slits, and separate anal and urogenital openings. A distinctive feature of chimaeras is the presence of extra claspers in the male, one in front of each pelvic fin and a prominent one on the forehead. The function of these appendages is not known, but they are thought to play a role in courtship. Chimaeras form the subclass Holocephali of the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Chondrichthyes.

chimera

, chimaera
1. Greek myth a fire-breathing monster with the head of a lion, body of a goat, and tail of a serpent
2. a fabulous beast made up of parts taken from various animals
3. Biology an organism, esp a cultivated plant, consisting of at least two genetically different kinds of tissue as a result of mutation, grafting, etc.
References in periodicals archive ?
Most important, you can tell our lawmakers that we want this law passed by signing the Shark, Ray, and Chimaera Conservation Act online."
chimaera infection, such as fatigue, unexplained fever, night sweats, weight loss, or wound infection.
The game looks spectacular, and we're really excited about this release," said Andrew Colosimo, founder of Chimaera.
chimaera was identified in the abscess aspirate by culture and sequencing.
Mycobacterium chimaera, a recently described species distinct from Mycobacterium intracellulare, is regarded as less virulent than Mycobacterium intracellulare [23, 24], but neither rifapentine nor rifabutin was effective against Mycobacterium chimaera.
Unfortunately, they took the bit about removing any creature comforts a bit too seriously, but if they ever get around to fitting a more buns-friendly seat and bumping up the horsepower to leave a more significant gap from the Scout, this will definitely be the TVR Chimaera of American bikes.
This eerie catch is said to be a long- nose chimaera that branched off from sharks almost 400 million years ago.
Son notables los dibujos de varias especies: Acineta superba, Brassia keiliana, Bollea violacea, Catasetum maculatum, Cyrtochilum tetracopis o Dracula chimaera por no decir mas; al lado de otras menos acabadas: odontoglossum sp., Cattleya schroederae, Sobralia rosea, Trichopilia fragrans y Lycaste macrophylla, entre otras.
The IUCN Red List of Threatened Species, which comes at the start of the year marking the 50th anniversary of The IUCN Red List, includes the analysis of the conservation status of 1,041 sharks, rays and closely related chimaera species.
Horn retorts that the idea to liberalise services is a chimaera that would hardly help demand.
Another family favourite is the trip up to the "fire mountain" Chimaera on the back of a tractor.
(6) The hybridity of these psyches evokes the centrality of the Chimaera to Jacques Derrida's essay "The Animal Therefore I Am," that mythical creature with the head and body of a lion, the entrails of a goat, and a dragon's tail.