Species
Graptodictya simplex (Ulrich, 1886)
Synonymy list
1886     Arthropora simplex  — Ulrich , pp. 65
1893     Arthropora simplex  — Ulrich , pp. 177
1911     Arthropora simplex Ulrich — Bassler , pp. 120, fig. text fig. 46
1970     Arthropora cf  simplex Ulrich — Rõõmusoks , pp. 327, fig. table 17
2009     Graptodictya 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. 
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 | Cryptostomata | 
| Suborder | Ptilodictyina | 
| Family | Ptilodictyidae | 
| Subfamily | Escharoporinae | 
| Genus | Graptodictya | 
| Species | bonnemai | 
| boreniensis | |
| delicata | |
| elegantula | |
| minima | |
| minuta | |
| perelegans | |
| rhombica | |
| simplex | |
| sulcata | 
References based on distribution
- Bassler, 1911b Üksnurme
- Rõõmusoks, 1970a Vasalemma Oandu Stage