Chondrichthyes

a class of the phylum Chordata containing the cartilaginous fish, sharks, rays and chimaeras. In some classifications, the term is synonymous with ELASMOBRANCHII. They are the lowest vertebrates with complete and separate vertebrae, moveable jaws and paired appendages. All are predators and virtually all are marine. They are characterized by the absence of true bone and the presence of CLASPERS (1) in males, and DENTICLES.

Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

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References in periodicals archive

Selachii, Dipnoi, Ganoidei, Pteraspidae und Cephalaspidae.

A unique Late Silurian Thelodus squamation from Saaremaa (Estonia) and its ontogenetic development/Haruldane Thelodus'e soomuskate Hilis-Silurist Saaremaalt ja tema ontogeneetiline arenemine

Interactions between sharks (order Selachii) and dolphins (order Cetacea, suborder Odontoceti) have been reported worldwide (see Heithaus, 2001 for a review of shark predation on dolphins).

Group size and composition of Guiana dolphins (Sotalia guianensis) (Van Beneden, 1864) in the Paranagua Estuarine Complex, Brazil/ Tamanho e composicao de grupos do boto-cinza (Sotalia guianensis) (Van Beneden, 1864) no Complexo Estuarino de Paranagua, Brasil

Catches of Selachii reported by FAO statistics for Spain, Italy, and Greece in the Mediterranean amount to 4209 metric tons in 2000, but include pelagic and benthic sharks, skates, rays, and chimaeras together.

Incidental catch and estimated discards of pelagic sharks from the swordfish and tuna fisheries in the Mediterranean Sea

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