Subspecies
Heterotrypa praenuntia simplex (Ulrich, 1893)
Synonymy list
1893     Dekayella praenuntia var. simplex — Ulrich , pp. 271, fig. 23: 39-42
1911     Dekayella praenuntia simplex Ulrich — Bassler , pp. 207, fig. text fig. 111
1953     Dekayella praenuntia var. simplex Ulr. — Modzalevskaya , pp. 102
1968     Heterotrypa praenuntia simplex (Ulrich) — Bork & Perry , pp. 345, fig. 46.4-7,9
1970     Dekayella praenuntia simplex Ulrich — Rõõmusoks , pp. 327, fig. table 17
1998     Heterotrypa praenuntia var. simplex — Marintsch 
2009     Dekayella praenuntia-simplex — Pachut & Fisherkeller , pp. 404
Selection of related publications
Rõõmusoks, A. 1970. Stratigraphy of the Viruan Series (Middle Ordovician) in Northern Estonia, I. pp. 1-346.  Valgus. 
Männil, R. M. 1959. Questions of stratigraphy and bryozoans of the Ordovician of Estonia. pp. 1-852.  Institut Geologii Akademii Nauk Estonskoi SSR. 
Modzalevskaya, E. A. 1953. Trepostomaty ordovika Pribaltiki i ih stratigraficheskoe znachenie.  Trudy Vsesoûznogo Naučno-Issledovatel'skogo Geologo-Razvedočnogo Instituta (VNIGRI)         91-167.  Gostoptehizdat. 
Bassler, R. S. 1911. The Early Paleozoic Bryozoa of the Baltic Provinces.  Bulletin of the US National Museum   77,      1-382.
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Bryozoa | 
| Class | Stenolaemata | 
| Superorder | Palaeostomata | 
| Order | Trepostomata | 
| Suborder | Halloporina (suborder) | 
| Family | Monticuliporidae | 
| Subfamily | Heterotrypinae | 
| Genus | Heterotrypa | 
| Species | praenuntia | 
| Subspecies | naevigera | 
| simplex | 
References based on distribution
- Bassler, 1911b Üksnurme
- Modzalevskaya, 1953
- Rõõmusoks, 1970a Vasalemma Oandu Stage
- Rõõmusoks, 1970a Rakvere Oandu Stage