1862 Goniatites pygmaeus Winchell, p.366.
1903 Glyphioceras pygmaeum.-Smith, p.65.
1955 Münsteroceras? pygmaeum.-Miller & Garner, p.142,
pl.4 fig.17,18.
| Suborder: |
Goniatitina
|
| Superfamily: |
Pericycloidea
|
| Family: |
Muensteroceratidae
|
| Genus: |
Muensteroceras?
|
| Species: | pygmaeum |
| Qualifier: | ss |
| Author: |
Winchell 1862,p.366
|
| Lower Boundary: |
UMI Marshall Sdst.I base, 349 million years
|
| Upper Boundary: |
UMI Marshall Sdst.I top, 339 million years
|