There are 6 matches
| Collection | Authorizer | Collection name | Reference |
|---|---|---|---|
| 24621 | S. Holland | District of Mackenzie Ceraurinella nahanniensis zone Chazyan - Ordovician 2-4 - Canada | Ludvigsen (1979) |
| 25172 | S. Holland | District of Mackenzie, Sunblood Range (Z-208) (coll. Rolf Ludvigsen 1971-1973) Whiterockian - Ordovician 2-4 - Canada | Tremblay and Westrop (1991) |
| 25932 | S. Holland | Sunblood Mountain Calyptaulax-Ceraurinella Biofacies (A-110) (= A 110) Chazyan - Ordovician 2-4 - Canada | Chatterton and Ludvigsen (1976) |
| 25933 | S. Holland | Sunblood Mountain Calyptaulax-Ceraurinella Biofacies (A-125) (= A 125) Chazyan - Ordovician 2-4 - Canada | Chatterton and Ludvigsen (1976) |
| 25935 | S. Holland | Esbataottine Mountain Calyptaulax-Ceraurinella Biofacies (P-1497) (= P 1497, GSC loc. no. C-26319) Chazyan - Ordovician 2-4 - Canada | Chatterton and Ludvigsen (1976) |
| 26057 | S. Holland | District of Mackenzie, Esbataottine Mountain (P-1485) (= P 1485, GSC loc. no. C-26320) Chazyan - Ordovician 2-4 - Canada | Chatterton and Ludvigsen (1976) |