Okhotsk Sea; a small one, D. I. marisalbi 

 Ostroumov, 1935, in the Barents and White seas; 

 and a medium-sized one, D. I. leucas, in the rest of 

 the range. However, geographical variation is more 

 complex than this classification suggests (Sergeant 

 and Brodie 1969). 

 Genus MONODON Linnaeus, 1758 



Monodon monoceros Linnaeus, 1758 (Narwhal). 

 North polar seas, mainly in deep waters. 



Family PHYSETERIDAE 



The genus Kogia is sometimes placed in a separate 

 family (Kogiidae). 



Genus PHYSETER Linnaeus, 1758 



Physeter macrocephalus Linnaeus, 1758 (sperm 



whale). 

 All oceans (except polar ice fields). (For use of this 

 name instead of P. catodon Linnaeus, 1758, see 

 Husson and Holthuis 1974.) 



Genus KOGIA Gray, 1846 



Handley (1966) has reviewed the distinguishing 

 features of the two species in this genus. 



Kogia breviceps (de Blainville, 1838) (pygmy sperm 

 whale). 



World-wide in tropical and warm temperate waters. 



Kogia simus Owen, 1866 (dwarf sperm whale). 

 The seas adjacent to South Africa, India, Ceylon, 

 Japan. Hawaii, California, Baja California, and 

 eastern United States. 



Family ZIPHIIDAE 



See Moore (1968) for diagnoses of the genera. 

 Genus BERARDIUS Duvernoy, 1851 



Two allopatric species are recognized. The North 

 Pacific form differs from the Southern Hemisphere form 

 chiefly by its much larger size. Possibly it should be 

 regarded as only a subspecies of the Southern Hemi- 

 sphere form. 



Berardius arnuxii Duvernoy, 1851 (southern giant bot- 



tlenose whale). 

 Southern Ocean; known from South Australia, New 

 Zealand, Argentina, Falkland Islands, South 

 Georgia, South Shetlands, South Africa, and off the 

 Antarctic Peninsula. 



Berardius bairdii Stejneger, 1883 (North Pacific giant 

 bottlenose whale). 



North Pacific from Japan and southern California 



north to the Bering Sea. 



Genus ZIPHIUS G. Cuvier, 1823 



Ziphius cavirostris G. Cuvier, 1823 (goosebeak whale). 

 All temperate and tropical seas. 



Genus TASMACETUS Oliver, 1937 



Tasmacetus shepherdi Oliver, 1937. 

 Known only from a few specimens stranded in New 

 Zealand, Chile, and Argentina. 



Genus INDOPACETUS Moore, 1968 



The one species of this genus was formerly included in 

 Mesoplodon. 



Indopaeetus pacificus (Longman, 1926) (Indo-Pacific 



beaked whale). 



Known from only two specimens stranded at 

 Mackay, Queensland, Australia, and Danane, 

 Somalia. 



Genus HYPEROODON Lacepede, 1804 



Two well-defined species are recognized: one in the 

 North Atlantic, the other in the Southern Hemisphere. 

 The latter constitutes subgenus Frasercetus Moore, 1968. 

 The occurrence of Hyperoodon in the North Pacific has 

 never been verified, and most if not all published records 

 of its occurrence there are based on misidentification of 

 Berardius. Beaked whales possibly referable to 

 Hyperoodon are taken by whalers off the Okhotsk Sea 

 coast of Hokkaido, but to date none has been examined 

 by a biologist (M. Nishiwaki, pers. commun.). 



Hyperoodon ampullatus (Forster, 1770) (North Atlan- 

 tic bottlenose whale). 



North Atlantic from Davis Strait and Novaya 

 Zemlya south to Rhode Island and the English 

 Channel; doubtfully recorded from the Mediter- 

 ranean Sea. 



Hyperoodon planifrons Flower, 1882 (flathead bot- 

 tlenose whale). 



Southern Ocean; known from Australia, New 

 Zealand, Argentina, the Falkland Islands, South 

 Georgia, the South Orkney Islands, South Africa, 

 and off the coast of Antarctica in the Pacific and In- 

 dian Ocean sectors. 



Genus MESOPLODON Gervais, 1850 



Eleven species are currently recognized by Moore 

 (1968). Mesoplodon pacificus is now placed in a separate 

 genus, Indopaeetus. Mesoplodon layardii is placed in the 

 subgenus Dolichodon Gray, 1871; M. densirostris in the 

 subgenus Dioplodon Gervais, 1850; and the remaining 

 species are placed in subgenus Mesoplodon. 



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