Order
Ellesmerocerida Flower et Kummel, 1950
Selection of related publications
Kröger, B., Mutvei, H. 2005. Nautiloids with multiple paired muscle scars from Lower-Middle Ordovician of Baltoscandia.  Palaeontology   48,   4,   781-791. DOI:10.1111/j.1475-4983.2005.00478.x
King, A. H. 1998. A review of the cyclostomiceratid nautiloids, including new taxa from the Lower Ordovician of Öland, Sweden.  Palaeontology   41,   2,   335 – 347.
Mutvei, H., Stumbur, H. 1971. Remarks on the Genus Pictetoceras (Cephalopoda: Ellesmerocerida).  Bulletin of the Geological Institutions of the University of Uppsala   2,   13,   117-122.
Foerste, A. F. 1932. The cephalopod genera Cyrtendoceras and Oelandoceras.  The Ohio Journal of Science   32,   3,   163-172.
King, W. 1846. Remarks on certain genera belonging to the class Palliobranchiata XI.  Annals and Magazine of Natural History   18,   117,   83-94. DOI:10.1080/037454809496570
List of species
1. Microstomioceras holmi King, 1998 | Kunda Stage
2. Oelandoceras byrumense Foerste, 1932 | Darriwilian
3. Oelandoceras haelluddenense Foerste, 1932 | Darriwilian
4. Oelandoceras kristdalaense Foerste, 1932 | Darriwilian
5. Paracyclostomiceras paucitumidum King, 1998 | Kunda Stage
6. Pictetoceras eichwaldi (Verneuil, 1845) | Kunda Stage
7. Pictetoceras oliviae King, 1998 | Kunda Stage
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Mollusca | 
| Class | Cephalopoda | 
| Subclass | Multiceratoidea | 
| Order | Bisonoceratida | 
| Cyrtocerinida | |
| Discosorida | |
| Ellesmerocerida | |
| Family | Cyclostomiceratidae | 
| Ellesmeroceratidae | |
| Genus | Pictetoceras | 
| Order | Oncocerida |