Acanthochitina |
Acanthochitina rashidi
|
Missouri |
Late Ordovician |
|
Acanthochitina |
Acanthochitina rashidi
|
Oklahoma |
Late Ordovician |
|
Actinotodissus |
Actinotodissus crassus
|
Canada(Quebec) |
Late Ordovician |
|
Actipilion |
Actipilion druggii
|
Missouri |
Late Ordovician |
|
Actipilion |
Actipilion druggii
|
Oklahoma |
Late Ordovician |
|
Actipilion |
Actipilion druggii
|
Kansas |
Late Ordovician |
|
Ancyrochitina |
Ancyrochitina merga
|
Oklahoma |
Late Ordovician |
|
Ancyrochitina |
Ancyrochitina merga
|
Missouri |
Late Ordovician |
|
Ancyrochitina |
Ancyrochitina merga
|
Kansas |
Late Ordovician |
|
Ancyrochitina |
Ancyrochitina merga
|
Canada(Quebec) |
Late Ordovician |
|
Baltisphaeridium |
Baltisphaeridium aliquigranulum
|
Oklahoma |
Late Ordovician |
|
Baltisphaeridium |
Baltisphaeridium aliquigranulum
|
Missouri |
Late Ordovician |
|
Baltisphaeridium |
Baltisphaeridium oligopsakium
|
Missouri |
Late Ordovician |
|
Baltisphaeridium |
Baltisphaeridium oligopsakium
|
Oklahoma |
Late Ordovician |
|
Calpichitina |
Calpichitina scabiosa
|
Missouri |
Late Ordovician |
|
Calpichitina |
Calpichitina scabiosa
|
Oklahoma |
Late Ordovician |
|
Clathrochitina |
Clathrochitina sylvanica
|
Oklahoma |
Late Ordovician |
|