Suborder:
|
Goniatitina
|
Superfamily:
|
Neoglyphioceratoidea
|
Family:
|
Cravenoceratidae
|
Subfamily:
|
Cravenoceratinae
|
Genus:
|
Lyrogoniatites |
Qualifier:
|
ge |
Author:
|
Miller & Furnish 1940,p.368
|
Lower Boundary:
|
DER Go beta--gamma, granos.base [P1--P2], 328.2 million years
|
Upper Boundary:
|
RUS Nm1b1--Nm1b2 (Domb.carinat.--tectus), 324.6 million years
|