Suborder:
|
Tornoceratina
|
Superfamily:
|
Praeglyphioceratoidea
|
Family:
|
Sporadoceratidae
|
Subfamily:
|
Sporadoceratinae |
Qualifier:
|
fy |
Author:
|
Korn 2002,p.573
|
Valid:
|
Sporadoceratidae Miller & Furnish,1957 [TAX5829 ] |
Lower Boundary:
|
UD2F--UD2G:(subvaricatum Zone base), 370.8 million years
|
Upper Boundary:
|
UD6E--UD6F:Cym.nigra--A.prorsum [19,40], 360 million years
|