Genus
Nilssonoceras Kröger, 2004
Aiheeseen liittyvät julkaisut
Kröger, B. 2004. Revision of Middle Ordovician orthoceratacean nautiloids from Baltoscandia. Acta Palaeontologica Polonica 49, 1, 57-74.
List of species
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Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Cephalopoda |
| Subclass | Orthoceratia |
| Order | Orthocerida |
| Suborder | Orthoceratina |
| Family | Geisonoceratidae |
| Genus | Archigeisonoceras |
| Geisonoceras | |
| Harrisoceras | |
| Ioachimoceras | |
| Kinnekulloceras | |
| Nilssonoceras | |
| Species | latisiphonatum |
| nilssoni | |
| Genus | Ordogeisonoceras |
| Temperoceras | |
| unranked | Protokionoceras |