Species
Proterovaginoceras incognitum (Schröder, 1882)
Synonymy list
1845     Orthoceras duplex — Verneuil , pp. 357, fig. 24:7
1866     Orthoceras duplex — Barrande , fig. 236:1-10; 238:33-36
1870     Orthoceras duplex — Barrande , fig. 438:9-11
1880     Endoceras duplex — Angelin & Lindström , pp. 1, fig. 1:9-11
1882     Endoceras incognitum  — Schröder , pp. 86, fig. 2:5a; 4:1.2A,B
1882     Endoceras duplex — Schröder , pp. 82, fig. 2:7
1889     Endoceras incognitum (cum syn.) — Rüdiger , pp. 34, fig. 1:6
1913     Vaginoceras commune — Hyatt in Zittel-Eastman , pp. 595, fig. text fig. 1104c
1957     Vaginoceras endoseptum — Chang , pp. 40, fig. 1:5
1964     Dideroceras wahlenbergi — Flower , pp. 55, fig. 3:2-4
Selection of related publications
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
Kröger, B. 2012. The “Vaginaten”: the dominant cephalopods of the Baltoscandian Mid Ordovician endocerid limestone.  GFF   134,   2,   115-132. DOI:10.1080/11035897.2012.691897
Mutvei, H. 1997. Siphuncular structure in Ordovician endocerid cephalopods.  Acta Palaeontologica Polonica   42,   3,   375-390.
Balashov, Z. G. 1968. Èndoceratoidei ordovika SSSR [Эндоцератоидеи ордовика СССР]. pp. 1-277.  Izdatel'stvo Leningradskogo Universiteta. 
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Mollusca | 
| Class | Cephalopoda | 
| Subclass | Multiceratoidea | 
| Order | Bisonoceratida | 
| Family | Proterovaginoceratidae | 
| Genus | Proterovaginoceras | 
| Species | belemnitiforme | 
| estonicum | |
| gladius | |
| incognitum | 
References based on distribution
- Balashov, 1968 Tallinn Kunda Stage
- Balashov, 1968 Iru quarry Kunda Stage
- Balashov, 1968 Aseri Kunda Stage
- Balashov, 1968 Kotly, Leningrad District Kunda Stage
- Balashov, 1968 Koporje outcrop, Leningrad Oblast Kunda Stage
- Balashov, 1968 Volkhov River outcrops Kunda Stage
- Kröger, 2013 Harku quarry trench Kunda Stage
- Kröger, 2013 Kadaka railway outcrop, Tallinn Kunda Stage
- Mutvei, 1997a Harku quarry Kunda Stage