Suborder:
|
Anarcestina
|
Superfamily:
|
Triainoceratoidea
|
Family:
|
Pharciceratidae
|
Subfamily:
|
Pharciceratinae |
Qualifier:
|
fs |
Author:
|
Hyatt 1900,p.336
|
Lower Boundary:
|
UD3B--UD3C:(delphinus Zone base) [14,55], 368 million years
|
Upper Boundary:
|
UD4A--UD4B: dunkeri Zone base [15,55], 366.8 million years
|