Suborder:
|
Goniatitina
|
Superfamily:
|
Neoicoceratoidea
|
Family:
|
Neoicoceratidae
|
Subfamily:
|
Neoicoceratinae
|
Genus:
|
Trochilioceras |
Qualifier:
|
gy |
Author:
|
Plummer & Scott 1937,p.181
|
Valid:
|
Eoasianites Ruzhentsev,1933,p.165 |
Lower Boundary:
|
UTX Brad Fm.--Caddo Creek Fm., 304.7 million years
|
Upper Boundary:
|
UTX Caddo Creek Fm.--Graham Fm., 304.3 million years
|