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Dingerkus (1986) suggested that the whale shark is the closest relative of the zebra shark, and proposed a single family encompassing all five species in the clade. [8] Compagno (1988) suggested affinity between this species and either Pseudoginglymostoma or a clade containing Rhincodon , Ginglymostoma , and Nebrius . [ 3 ]
G. cuvieri specimen, Museo di Storia Naturale di Verona. This species has had a complex taxonomic history. [1] One specimen of the species was initially misidentified by Volta (1796) as a fossil specimen of the great white shark (Carcharodon carcharias, at the time Squalus carcharias), and another as a fossil specimen of the zebra shark (Stegostoma tigrinum, at the time Squalus fasciatus).
Orectolobiformes: They are commonly referred to as the carpet sharks, including zebra sharks, nurse sharks, wobbegongs, and the whale shark. Pristiophoriformes: These are the sawsharks, with an elongated, toothed snout that they use for slashing their prey. Squaliformes: This group includes the dogfish sharks and roughsharks.
The first shark-like chondrichthyans appeared in the oceans 400 million years ago, [1] developing into the crown group of sharks by the Early Jurassic. [2] Listed below are extant species of shark. Sharks are spread across 556 described and 23 undescribed species in eight orders. The families and genera within the orders are listed in ...
In biology, taxonomic rank (which some authors prefer to call nomenclatural rank [1] because ranking is part of nomenclature rather than taxonomy proper, according to some definitions of these terms) is the relative or absolute level of a group of organisms (a taxon) in a hierarchy that reflects evolutionary
There are modern shell-crushing species, the largest being the Zebra shark, which reaches a maximum length of a little over 3.5 meters (12 feet) — not near as gigantic as Ptychodus.
Sharks are split into eight orders: Carcharhiniformes: ground sharks, the largest order of sharks, including requiem sharks, catsharks, swellsharks, houndsharks, weasel sharks and hammerheads; Heterodontiformes: bullhead sharks; Hexanchiformes: cow sharks and frilled sharks; Lamniformes: mackerel sharks, including thresher sharks
Leonard Compagno – international authority on shark taxonomy, best known for 1984 catalog of shark species (FAO) Jacques-Yves Cousteau – French naval officer, explorer, ecologist, filmmaker, innovator, scientist, photographer, author and researcher who studied the sea and all forms of life in water including sharks