Chaetodon Wattsi
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Chaetodon Wattsi
''Chaetodon'' is a tropical fish genus in the family (biology), family Chaetodontidae. Like their relatives, they are known as "butterflyfish". This genus is by far the largest among the Chaetodontidae, with about 90 living species included here, though most might warrant recognition as distinct genera. Species Extant species There are currently 87 recognized species in this genus: ''Chaetodon sensu stricto'' * ''Chaetodon capistratus'' Linnaeus, 1758 (Foureye butterflyfish) * ''Chaetodon ocellatus'' Marcus Elieser Bloch, Bloch, 1787 (Spotfin butterflyfish) * ''Chaetodon striatus'' Linnaeus, 1758 (Banded butterflyfish) ''C. robustus'' group * ''Chaetodon hoefleri'' Franz Steindachner, Steindachner, 1881 (Four-banded butterflyfish) * ''Chaetodon robustus'' Albert Günther, Günther, 1860 (Three-banded butterflyfish) ''Lepidochaetodon'' group Image:Bep chaetodon punctatofasciatus.jpg, Spotband butterflyfish''Chaetodon (Exornator) punctatofasciatus'' Image:Chaetodon gu ...
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Early Oligocene
The Rupelian is, in the geologic timescale, the older of two age (geology), ages or the lower of two stage (stratigraphy), stages of the Oligocene epoch (geology), Epoch/series (stratigraphy), Series. It spans the time between . It is preceded by the Priabonian Stage (part of the Eocene) and is followed by the Chattian Stage. Name The stage is named after the small river Rupel in Belgium, a tributary to the Scheldt. The Belgian Rupel Group derives its name from the same source. The name Rupelian was introduced in scientific literature by Belgian geologist André Hubert Dumont in 1850. The separation between the group (stratigraphy), group and the stage was made in the second half of the 20th century, when stratigraphers saw the need to distinguish between lithostratigraphy, lithostratigraphic and chronostratigraphy, chronostratigraphic names. Stratigraphic definition The base of the Rupelian Stage (which is also the base of the Oligocene Series) is at the extinction of the foram ...
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