Species
Parorthocrinus liber Jaekel, 1918
Synonymy list
1918     Parorthocrinus liber n. g., n. sp. — Jaekel , pp. 26, fig. 18
1976     Parorthocrinus liber Jaekel, 1918 — Arendt , pp. 77, fig. I 2
Selection of related publications
Arendt, Yu. A. 1976. Ordovikskie iglokožie gemistreptokrinoidei.  Bulletin of the Moscow Society of Naturalists. Geological series   51,   2,   63-84.
Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Echinodermata | 
| Subphylum | Pelmatozoa | 
| Class | Crinoidea | 
| Order | Hemistreptocrinida | 
| Family | Hemistreptocrinidae | 
| Genus | Parorthocrinus | 
| Species | liber | 
References based on distribution
- Arendt, 1976 Volkhov Stage