Order
Pseudorthocerida Flower et Caster, 1935
Selection of related publications
Manda, Š., Turek, V. 2015. Colour patterns on Silurian orthocerid and pseudorthocerid Conchs from Gotland - palaeoecological implications.Estonian Journal of Earth Sciences 64 , 1,74-79. DOI:10.3176/earth.2015.13
Stumbur, H. A. 1956. On the nautiloids of Kohila Subseries (Upper Ordovician of East Baltic).Tartu Riikliku Ülikooli Toimetised 42 , 176-185.
Stumbur, H. 1955. Eesti NSV ülem-ordoviitsiumi nautiloiididest [Diplomitöö].
List of species
3. Spyroceras perlaeve (Strand, 1934) | Upper Ordovician
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Klassificering
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Cephalopoda |
| Subclass | Orthoceratia |
| Order | Astroviida |
| Bajkalocerida | |
| Dissidoceratida | |
| Endoceratida | |
| Orthocerida | |
| Pseudorthocerida | |
| Family | Spyroceratidae |
| Genus | Lyecoceras |
| Order | Rioceratida |
See also