Related Experiment Video
Updated: Feb 23, 2026
07:26
Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
Published on: August 22, 2022
2.0K
Ancient whales did not filter feed with their teeth.
David P Hocking1,2, Felix G Marx3,2,4, Erich M G Fitzgerald2,5,6
1School of Biological Sciences, Monash University, 8 Innovation Walk, Clayton, Victoria, Australia david@dphocking.com.
Biology Letters
|September 1, 2017
Summary
The origin of baleen whales (Mysticeti) is not linked to tooth-based filter feeding. Their sharp teeth, like those of carnivores, indicate prey capture, not filtration.
Area of Science:
- Paleontology
- Marine Biology
- Evolutionary Biology
Background:
- The evolution of baleen whales (Mysticeti), the largest animals, is linked to filter feeding.
- Archaic whales had heterodont dentition, unlike modern baleen whales, raising questions about their function and role in the evolution of filter feeding.
Purpose of the Study:
- To investigate the function of teeth in archaic mysticetes.
- To determine if early whales used their teeth for filtration before developing baleen.
Main Methods:
- Comparative analysis of tooth sharpness in archaic mysticetes, terrestrial carnivorans, pinnipeds, and archaeocetes.
- Evaluation of postcanine tooth morphology in leopard and crabeater seals.
Main Results:
- Archaic mysticete teeth were sharp, suitable for capturing and processing prey, similar to carnivorans.
- The postcanine teeth of leopard and crabeater seals are blunt and not adapted for raptorial feeding.
- Mysticete teeth and baleen likely did not have a connected function in early whales.
Conclusions:
- Mysticetes did not evolve through a tooth-based filtration stage.
- The sharp teeth of archaic mysticetes suggest a feeding strategy involving both biting and suction, similar to modern pinnipeds and toothed whales.
Related Concept Videos
02:56The Fossil Record
27.6K
The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
27.6K
01:15Teeth
1.9K
The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
1.9K
02:35What is Evolutionary History?
43.9K
Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
43.9K
01:46Types of Selection
45.4K
Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
45.4K
00:48Optimal Foraging
14.1K
How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
14.1K
01:21Tooth Anatomy
2.4K
The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
2.4K