Species
Isorthoceras luhai (Stumbur, 1956)
Synonymy list
1956     Orthoceras luhai — Stumbur 
2011     Isorthoceras luhai (Stumbur, 1956) — Kröger et al. , pp. 45
2025     Isorthoceras luhai (Stumbur, 1956) comb. nov. — Kröger , pp. 45, fig. Figs 19A–C, F, 20–21
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
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Mollusca | 
| Class | Cephalopoda | 
| Subclass | Orthoceratia | 
| Order | Orthocerida | 
| Suborder | Orthoceratina | 
| Family | Proteoceratidae | 
| Genus | Isorthoceras | 
| Species | angelini | 
| bisignatum | |
| cavi | |
| curvilineatum | |
| dalecarlense | |
| elongatocinctum | |
| heroyense | |
| junceum | |
| luhai | |
| maris | |
| nikwis | |
| padisense | |
| saaremense | |
| sociale | |
| suave | |
| sylphide | |
| urdr | |
| vexilli | |
| wahlenbergi |