Species
Gorbyoceras stumburi (Kröger, 2013)
Synonymy list
1955     Spyroceras paulum Stumbur, 1955 nomen nudum — Stumbur 
2006     Dawsonoceras sp. — Kröger & Isakar , pp. 157, fig. 10e,j; 12h
2013     Dawsonoceras stumburi sp. nov. — Kröger , pp. 32, fig. 16E, 17B
2025     Gorbyoceras stumburi (Kröger, 2013) — Kröger , pp. 42, fig. Figs 12J, 18
Selection of related publications
Kröger, B. 2025. The Lyckholm acme of cephalopods – Review of the late Katian (Vormsi–Pirgu regional stages) Ordovician cephalopods of Estonia.  European Journal of Taxonomy   978,      1-169. DOI:10.5852/ejt.2025.978.2801
Kröger, B. 2013. The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden.  European Journal of Taxonomy   41,   41,   1-110. DOI:10.5852/ejt.2013.41
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Mollusca | 
| Class | Cephalopoda | 
| Subclass | Orthoceratia | 
| Order | Orthocerida | 
| Suborder | Orthoceratina | 
| Family | Proteoceratidae | 
| Genus | Gorbyoceras | 
| Species | alternestriatum | 
| clathratoannulatum | |
| stumburi | |
| textumaraneum | 
References based on distribution
- Kröger, 2013 Kallholn quarry Katian
- Kröger, 2025 Hosholm shore Pirgu Stage
- Kröger, 2025 Saxby shore Kõrgessaare Formation