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The family Balaenidae, the right whales, contains two genera and four species. All right whales have no ventral grooves; a distinctive head shape with a strongly arched, narrow rostrum, bowed lower jaw; lower lips that enfold the sides and front of the rostrum; and long, narrow, elastic baleen plates (up to nine times longer than wide) with fine baleen fringes.
Diagram featuring the typical skeletal of a toothed whale (top) and a baleen whale (bottom) The cetacean skeleton is largely made up of cortical bone , which stabilizes the animal in the water. For this reason, the usual terrestrial compact bones, which are finely woven cancellous bone , are replaced with lighter and more elastic material.
Blainville's beaked whale (Mesoplodon densirostris), or the dense-beaked whale, is believed to be the widest ranging mesoplodont whale.The French zoologist Henri de Blainville first described the species in 1817 from a small piece of jaw — the heaviest bone he had ever come across — which resulted in the name densirostris (Latin for "dense beak").
Omura's whale or the dwarf fin whale (Balaenoptera omurai) is a species of rorqual about which very little is known. [3] Before its formal description, it was referred to as a small, dwarf or pygmy form of Bryde's whale by various sources. [4] The common name and specific epithet commemorate Japanese cetologist Hideo Omura . [5] [6]
The whale's scientific name is Eubalaena glacialis, which means "good, or true, whale of the ice". The cladogram is a tool for visualizing and comparing the evolutionary relationships between taxa. The point where a node branches off is analogous to an evolutionary branching – the diagram can be read left-to-right, much like a timeline.
After a near-death experience, filmmaker Tom Mustill embarks on a quest to understand how sea mammals communicate with each other and humans.
The smallest basilosaurid whale is Tutcetus and measures 8.2 ft (2.5 m) long. [34] The large size of basilosaurids is due to the extreme elongation of their lumbar vertebrae. They had a tail fluke, but their body proportions suggest that they swam by caudal undulation and that the fluke was not used for propulsion.
In honor of National Breastfeeding Awareness Month, Kayleen Lowe, lactation coordinator for St. George Regional Hospital, said it is important to shine a light on the benefits, but also the ...