By T. A. Jefferson
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Extra resources for Marine Mammals of the World: Species Identification Guide
Example text
Neobalaenidae: Caperea (Pygmy right whale) p. 48 3b. Base of rostrum only slightly wider than tip; from side, rostrum strongly arched; mandibles extremely bowed out (Fig. 121) . . . . . . . Balaenidae: Right or bowhead whales base of rostrum much wider than tip base of rostrum only slightly wider than tip DORSAL VIEW DORSAL VIEW Fig. 120 Neobalaenidae 4a. Rostrum slightly arched from side; nasals large; frontals exposed on vertex (Fig. 122) . . . . . . . . .
Phocoenidae: Porpoises 12b. Teeth circular or oval in cross-section, generally with pointed tips (except in Orcaella, or unless worn or broken); no bosses in front of nares (Fig. 139) . Delphinidae: Oceanic dolphins bony bosses teeth generally with pionted tips teeth with blunt tips LATERAL VIEW Fig. 138 Phocoenidae LATERAL VIEW Fig. 3 SUBORDER MYSTICETI - Baleen Whales MYSTICETI There are 4 families of baleen whales. Mysticetes are universally large (with females growing larger than males); the smallest is the pygmy right whale (c 7 m long), and the largest is the blue whale (the largest animal ever to live, up to 33 m or more in length and 160 t in weight).
In the mouth there is baleen (stiff plates of keratin), instead of teeth. Baleen whales are batch feeders, taking in great quantities of water in a single gulp, and then using the fringes on their baleen plates to filter small schooling fish or invertebrates from the water. Nearly all mysticetes make long-range seasonal migrations. 1 Guide to Families of Baleen Whales BALAENIDAE Right and Bowhead Whales (3 species in 2 genera) p. 42 The right and bowhead whales are large and chunky, with heads that comprise up to one-third of their body length.