Suborder:
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Tornoceratina
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Superfamily:
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Prionoceratoidea
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Family:
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Prionoceratidae
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Subfamily:
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Acutimitoceratinae
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Genus:
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Acutimitoceras
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Subgenus:
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Streeliceras |
Qualifier:
|
gs |
Author:
|
Becker 1996,p.37
|
Lower Boundary:
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UD6E--UD6F:Cym.nigra--A.prorsum [19,40], 360 million years
|
Upper Boundary:
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low.Tournais.--mid.Tournais. [Tn1--Tn2], 357.5 million years
|