Odontoceti


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Related to Odontoceti: Odontocetes, Toothed whales

Odontoceti

[ō‚dänt·ə′sē‚tī]
(vertebrate zoology)
The toothed whales, a suborder of cetacean mammals distinguished by a single blowhole.

Odontoceti

 

(toothed whales), a suborder of aquatic mammals of the order Cetacea. The body of a toothed whale is 1.2–20 m long. In distinction to Mysticeti, it has from two to 240 teeth. There is one nasal opening at the top of the head. The lower jaws are shorter than the skull and are joined in front. Toothed whales orient themselves mainly by means of echolocation. The formation of the echolocation apparatus, with its system of air sacs, has caused skull asymmetry in toothed whales. They have highly developed hearing, and a sound signal and voice organ linked with the nasal passage. Toothed whales live in all seas and oceans. The suborder Odontoceti comprises four families: Physeteridae (two species: sperm whale and pygmy sperm whale), Platanistidae (four species), Ziphiidae (17 species), and Delphinidae (50 species). The waters of the USSR contain 23 species (belonging to 20 genera). Toothed whales reach sexual maturity between two and six years of age. Their food consists offish, cephalopod mollusks, and crustaceans. The most important for man are the sperm whale, bottle-nosed dolphin, common dolphin, harbor porpoise, white whale (beluga), killer whale, and blackfish. They are sought for industrial oil, spermaceti, and meat. The number of many species has sharply decreased, and some Odontoceti species have been placed under protection.

REFERENCES

Tomilin, A. G. Kitoobramye. Moscow, 1957. (Zveri SSSR i prilezhashchikh stran, vol. 9.)
Tomilin, A. G. Kitoobraznye fanny morel SSSR. Moscow, 1962.
Zhizn’ ihivotnykh, vol. 6. Moscow, 1971.

A. G. TOMLIN

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Comparative facial anatomy of beaked whales Ziphiidae and systematic revision among the family of extant Odontoceti.
En anos recientes se han dado a conocer nuevos hallazgos de Odontoceti procedentes de dos localidades de Costa Rica, donde se han descrito restos de Squalodon un Squalodontidae del Mioceno Medio de la Formacion Rio Banano (Laurito et al.
2003) Didelphimorphia 23 24 (+1) 28 (+4) 32 (+3) Paucituberculata 0 0 1 (+1) 1 Xenarthra 16 16 16 16 Chiroptera 82 101 (+19) 104 (+3) 108 (+4) Primates 16 20 (+4) 20 24 (+4) Carnivora 25 26 (+1) 27 (+1) 27 Odontoceti 1 1 1 1 Artiodactyla 12 14 (+2) 14 14 Perissodactyla 1 1 1 1 Rodentia 100 110 (+10) 113 (+3) 131 (+18) Lagomorpha 1 1 1 1 TOTAL 277 314 (+37) 326 (+12) 356 (+30) Tabla 2 Representatividad de especies en la coleccion de mamiferos de la Coleccion Boliviana de Fauna (CBF--datos a agosto 2004).
2012: Cetaceos fosiles (Mammalia, Odontoceti, Euimnodelphinoidea, Inioidea, Physeterioidea) de la Formacion Curre, Mioceno Superior (Hemphilliano temprano tardio) de Costa Rica.
FOSSIL CETACEA (MAMMALIA, ODONTOCETI, EURHINODELPHINOIDEA, INIOIDEA, PHYSETERIOIDEA) OF THE CURRE FORMATION, UPPER MIOCENE (EARLY-LATE HEMPHILLIAN) OF COSTA RICA