Ancyrochitina merga |
Cyathochitina vaurealensis |
Biostratigraphy |
North America |
Katian |
Katian |
1 |
|
|
Ancyrochitina merga |
Kralodvorian |
Regional Standard |
Mediterranean & North Gondwana |
Katian |
Katian |
1 |
|
|
Ancyrochitina merga |
Leangella (Leptestiina) prantli |
Biostratigraphy |
Spain |
Katian |
Katian |
1 |
|
|
Ancyrochitina merga |
Paraorthograptus pacificus |
Biostratigraphy |
Australia |
Katian |
Katian |
1 |
|
|
Ancyrochitina merga |
Paraorthograptus pacificus |
Biostratigraphy |
Russian Federation |
Katian |
Katian |
1 |
|
|
Ancyrochitina merga |
Paraorthograptus pacificus |
Biostratigraphy |
United Kingdom |
Katian |
Katian |
1 |
|
|
Ancyrochitina merga |
Tanuchitina anticostiensis |
Biostratigraphy |
North America |
Katian |
Katian |
1 |
|
|