Suborder:
|
Goniatitina
|
Superfamily:
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Neoicoceratoidea
|
Family:
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Metalegoceratidae
|
Subfamily:
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Eothinitinae
|
Genus:
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Eothinites
|
Species:
|
evolutus |
Qualifier:
|
ss |
Author:
|
Leonova 1992,p.151
|
Lower Boundary:
|
Sygar Fm. base, 284.4 million years
|
Upper Boundary:
|
Chelamchin Fm. top, 270.6 million years
|