English: Aglaocetus moreni (Lydekker, 1894) - fossil baleen whale skull attributed to the Oligocene of Argentina. (FMNH P12955, Field Museum of Natural History, Chicago, Illinois, USA)
This species is also known as Cetotherium moreni and Cetotheriopsis moreni.
From museum signage:
"First there were meat eaters, then came plankton feeders. Around 40 million years ago, a new group of whales diverged from the earliest toothed whales: baleen whales. Instead of teeth, these whales have a comb-like screen of tissue called baleen that grows from their upper jaws. Baleen allows whales to filter tiny plankton from the seawater, taking advantage of an abundant food source. All whales today can be divided into two groups, baleen whales and toothed whales.
[referring to skull shown above] The skull belonged to an early baleen whale.
"
Classification: Animalia, Chordata, Vertebrata, Mammalia, Artiodactyla, Cetacea, Mysticeti, Aglaocetidae
See info. at:
en.wikipedia.org/wiki/Aglaocetus
and
This image was originally posted to Flickr. Its license was verified as "cc-by-2.0" by the UploadWizard Extension at the time it was transferred to Commons. See the license information for further details.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
https://creativecommons.org/licenses/by/2.0CC BY 2.0 Creative Commons Attribution 2.0 truetrue
Captions
Add a one-line explanation of what this file represents