Solisphaeridium |
Solisphaeridium spinoglobosum
|
Iowa |
Late Frasnian |
|
Stellinium |
Stellinium comptum
|
Iowa |
Late Frasnian |
|
Stellinium |
Stellinium micropolygonale
|
Iowa |
Late Frasnian |
|
Stellinium |
Stellinium octoaster
|
Iowa |
Late Frasnian |
|
Stenozonotriletes |
Stenozonotriletes sp
|
Iowa |
Late Frasnian |
|
Tasmanites |
Tasmanites sp
|
Iowa |
Late Frasnian |
|
Uncinisphaera |
Uncinisphaera imaguncula
sp. nov. |
Iowa |
Late Frasnian |
|
Unellium |
Unellium piriforme
|
Iowa |
Late Frasnian |
|
Unellium |
Unellium winslowiae
|
Iowa |
Late Frasnian |
|
Veryhachium |
Veryhachium arcarium
|
Iowa |
Late Frasnian |
|
Veryhachium |
Veryhachium cymosum
|
Iowa |
Late Frasnian |
|
Veryhachium |
Veryhachium europaeum
|
Iowa |
Late Frasnian |
|
Veryhachium |
Veryhachium lairdii
|
Iowa |
Late Frasnian |
|
Veryhachium |
Veryhachium legrandii
|
Iowa |
Late Frasnian |
|
Veryhachium |
Veryhachium polyaster
|
Iowa |
Late Frasnian |
|
Veryhachium |
Veryhachium polyaster
|
Iowa |
Late Frasnian |
|
Veryhachium |
Veryhachium trispinosum
|
Iowa |
Late Frasnian |
|