Washington, December 25 (ANI): A new study has determined that an ancient dwarf whale unearthed in southeastern Australia captured its prey by slurping up mouthfuls of mud.
According to a report in National Geographic News, the fossil whale, thought to be between 25 and 28 million years old, hints that mud sucking might have been a precursor to the filter feeding used by today's baleen whales.
Many modern whale species use hair-like structures called baleen to filter tiny prey such as krill from seawater.
Baleen species include the humpback, the minke, and the largest animal ever to have lived on Earth, the blue whale.
The newfound fossil whale, which measures just nine feet (three meters) long, shares the same distinct jaw and skull structures as today's baleens.
"But the tiny whale also had teeth," said study author Erich Fitzgerald, a paleontologist at Museum Victoria in Melbourne, Australia.
The odd combination suggests that the dwarf whale might have been adept at feeding on larger, chewier prey from the seafloor, using its tongue and facial muscles to "vacuum" along the sandy bottom, according to the study authors.
Dubbed Mammalodon colliver, the dwarf whale was discovered in 1932 near the seaside town of Torquay, southwest of Melbourne.
Until now, the fossils had remained relatively unstudied.
In addition to the whale's unusual feeding style, the new research shows that the dwarf appears to have evolved from larger ancestors.
The animal's small size was likely the product of evolutionary adaptations that allowed the species to exploit an ecological niche unusual for whales: suction feeding from the seafloor, according to Fitzgerald. (ANI)