Species
Irucrinus antiquus (Yeltyschewa, 1964)
Synonymy list
1964     Decacrinus antiquus Yeltyschewa sp. nov. — Yeltyschewa , pp. 66, fig. III 7-9
1986     Irucrinus antiquus (Yeltyschewa, 1964) — Stukalina , pp. 72
1988     Irucrinus antiquus (Yeltyschewa, 1964) — Stukalina , fig. 5:4
2000     Irucrinus antiquus (Yeltyschewa, 1964) — Stukalina , fig. 1:3
Selection of related publications
Yeltyscheva, R. S. (Yeltyschewa, R. S.) 1964. Stebli ordovikskih morskih lilij Pribaltiki (nižnij ordovik).  Voprosy paleontologii   IV,      59-82.  Izdatel'stvo Leningradskogo Universiteta. 
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Echinodermata | 
| Subphylum | Pelmatozoa | 
| Class | Crinoidea | 
| Organism group | Stemmed echinoderms outgroup (informal) | 
| Genus | Irucrinus (col.) | 
| Species | Irucrinus antiquus | 
References based on distribution
- Yeltyscheva, 1964 Popovka River, Leningrad Oblast Kunda Stage