There are 12 matches
| Collection | Authorizer | Collection name | Reference |
|---|---|---|---|
| 24621 | S. Holland | District of Mackenzie Ceraurinella nahanniensis zone Chazyan - Ordovician 2-4 - Canada | Ludvigsen (1979) |
| 24628 | S. Holland | District of Mackenzie Bathyurus ulu zone Blackriveran - Ordovician 4-5 - Canada | Ludvigsen (1979) |
| 24631 | S. Holland | District of Mackenzie Ceraurus gabrielsi zone Blackriveran - Ordovician 4-5 - Canada | Ludvigsen (1979) |
| 24634 | S. Holland | District of Mackenzie Ceraurinella longispina zone Blackriveran/Rocklandian - Ordovician 4-5 - 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) |
| 25308 | S. Holland | Mackenzie Mountains, Sunblood Mountain, Esbataottine Fm Mimella Fauna Chazyan/Caradoc - Ordovician 2-4-4-5 - Canada | Ludvigsen (1975) |
| 25309 | S. Holland | Mackenzie Mountains, Sunblood Range, Esbataottine Fm Mimella Fauna Chazyan/Caradoc - Ordovician 2-4-4-5 - Canada | Ludvigsen (1975) |
| 25310 | S. Holland | Mackenzie Mountains, Whittaker Range, Esbataottine Formation Mimella Fauna Chazyan/Caradoc - Ordovician 2-4-4-5 - Canada | Ludvigsen (1975) |
| 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) |