Suborder:
|
Prolecanitina
|
Superfamily:
|
Medlicottioidea
|
Family:
|
Medlicottiidae
|
Subfamily:
|
Episageceratinae |
Qualifier:
|
fs |
Author:
|
Ruzhencev 1956,p.160
|
Lower Boundary:
|
RIT Basleo beds base, 270.6 million years
|
Upper Boundary:
|
Griesbachian--Dienerian [GRI--DIE], 250.3 million years
|