Suborder:
|
Anarcestina
|
Superfamily:
|
Triainoceratoidea
|
Family:
|
Pharciceratidae
|
Genus:
|
Sphaeropharciceras |
Qualifier:
|
gy |
Author:
|
Bogoslovsky 1955,p.1104
|
Valid:
|
Pharciceras Hyatt,1884 TAX5745 |
Lower Boundary:
|
mid.--up.varcus Zone [17,00], 389 million years
|
Upper Boundary:
|
Givetian--Frasnian [GIV--FRS], 385.3 million years
|