Suborder:
|
Prolecanitina
|
Superfamily:
|
Medlicottioidea
|
Family:
|
Medlicottiidae
|
Subfamily:
|
Medlicottiinae
|
Genus:
|
Neogeoceras
|
Species:
|
thaumastum |
Qualifier:
|
ss |
Author:
|
Ruzhencev 1976,p.41
|
Lower Boundary:
|
Wordian--Capitanian (Midian) [WOR--CAP], 265.8 million years
|
Upper Boundary:
|
lower Capitanian--upper Capitanian, 263 million years
|