Information about Cetotherium
| Cetotherium Fossil range: Mid to Late Miocene | ||||||||||||||
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) Reconstruction of Cetotherium Reconstruction of Cetotherium | ||||||||||||||
| Scientific classification | ||||||||||||||
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All modern mysticetes are large filter-feeding or baleen whale, though the exact means by which baleen are used differ among species (gulp-feeding with balaenopterids, skim-feeding with balaenids, and bottom ploughing with eschrichtiids). The first members of some modern groups appeared during the middle Miocene. These changes may have been a result of worldwide environmental change and physical changes in the oceans. A large scale change in ocean current and temperature could have initiated the radiation of modern mysticetes, leading to the demise of the archaic forms. Generally it is thought the four modern mysticete families have separate origins among the cetotheres, however this is only speculative. Modern baleen whales, [Balaenopteridae (rorquals and humpback whale, Megaptera novaengliae), Balaendia (right whales), Eschrichtiidae (gray whale, Eschrictius robustus), and Neobalaenidae (pygmy right whale, Caperea marginata) all have derived characteristics presently unknown in any cetothere. Cetotheriums are said to have been around 12 meters or 40 feet long.
See also
The Miocene Epoch is a period of time that extends from about 23.03 to 5.332 million years before the present. As with other older geologic periods, the rock beds that define the start and end are well identified but the exact dates of the start and end of the period are uncertain.
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Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. Scientific classification also can be called scientific taxonomy, but should be distinguished from folk taxonomy, which lacks scientific basis.
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Chordata
Bateson, 1885
Typical Classes
See below
Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates.
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Bateson, 1885
Typical Classes
See below
Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates.
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Mammalia
Linnaeus, 1758
Subclasses & Infraclasses
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Linnaeus, 1758
Subclasses & Infraclasses
- Subclass †Allotheria*
- Subclass Prototheria
- Subclass Theria
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Cetacea
Brisson, 1762
Diversity
Around 88 species; see list of cetaceans or below.
Suborders
Mysticeti
Odontoceti
Archaeoceti (extinct)
(see text for families)
The order Cetacea
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Brisson, 1762
Diversity
Around 88 species; see list of cetaceans or below.
Suborders
Mysticeti
Odontoceti
Archaeoceti (extinct)
(see text for families)
The order Cetacea
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Mysticeti
Cope, 1891
Diversity
Around 15 species; see list of cetaceans or below.
Families
Balaenidae
Balaenopteridae
Eschrichtiidae
Neobalaenidae
The baleen whales, also called whalebone whales or great whales
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Cope, 1891
Diversity
Around 15 species; see list of cetaceans or below.
Families
Balaenidae
Balaenopteridae
Eschrichtiidae
Neobalaenidae
The baleen whales, also called whalebone whales or great whales
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Cetacea
Brisson, 1762
Diversity
Around 88 species; see list of cetaceans or below.
Suborders
Mysticeti
Odontoceti
Archaeoceti (extinct)
(see text for families)
The order Cetacea
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Brisson, 1762
Diversity
Around 88 species; see list of cetaceans or below.
Suborders
Mysticeti
Odontoceti
Archaeoceti (extinct)
(see text for families)
The order Cetacea
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C. megalodon
Binomial name
Carcharodon megalodon
Agassiz, 1843
Carcharodon megalodon (or Carcharocles megalodon
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Binomial name
Carcharodon megalodon
Agassiz, 1843
Carcharodon megalodon (or Carcharocles megalodon
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Cetacea
Brisson, 1762
Diversity
Around 88 species; see list of cetaceans or below.
Suborders
Mysticeti
Odontoceti
Archaeoceti (extinct)
(see text for families)
The order Cetacea
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Brisson, 1762
Diversity
Around 88 species; see list of cetaceans or below.
Suborders
Mysticeti
Odontoceti
Archaeoceti (extinct)
(see text for families)
The order Cetacea
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Baleen makes up baleen plates, which are arranged in two parallel rows that look like combs of thick hair; they are attached to the upper jaws of baleen whales. It is composed of keratin, which is the same substance that makes up human hair and nails.
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ocean current is any more or less continuous, directed movement of ocean water that flows in one of the Earth's oceans. Ocean Currents are rivers of hot or cold water within the ocean.
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25: 235–246.
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Herod_Archelaus
