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Nineteen species of cetaceans such as baleen whales, toothed whales and porpoises were known from the area.
Unlike those in dolphins and toothed whales, humpback whale ear bones are fused to the animals' skull, providing a direct link to conduct vibrations in the water through their bones to their ears.
That disappearance may have something to do with the rise of marine mammals such as seals and toothed whales, Mayr said.
Toothed whales, on the other hand, include animals that are classically identified as whales - like the sperm whale and the orca, also known as the (http://www.
Felix Marx has worked primarily on the fossil record of the earliest baleen whales (mysticetes), while Olivier Lambert has studied principally the fossils of extinct toothed whales (odontocetes).
The sperm whales, members of Earth's largest species of toothed whales, were originally spotted by fishermen in Tyre early Thursday morning.
At a special kiosk, visitors can listen to clips of several species, as well as the screech of sonar, which is thought to disrupt navigation of toothed whales and has been linked to mass strandings.
Echolocation, or biological sonar, is used by all the world's toothed whales such as dolphins, sperm whales and orcas.
While they are called toothed whales they only have teeth in the lower jaw that fit neatly into small sockets in the upper jaw.
These fish are important food for elephant seals, toothed whales and bigger fish yet the ecology and overall importance of these fish in Southern Ocean food webs remains poorly known.
Ecology lawyers Gloria Estenzo-Ramos and Liza Osorio joined Cabrido in filing the case on behalf of the dolphins, toothed whales, porpoises and other cetacean species in Tanon Strait.
The age of the skull and the animal's relationship to other extinct whales imply that the basic anatomy for echolocation developed shortly after toothed whales split from filter-feeding whales 35 million years ago, Geisler and colleagues argue March 12 in Nature.