Genus
Ortonella Garwood, 1914
Selection of related publications
Kõrts, A. 1991. Distribution of calcareous algae, oncolites and stromatolites in Wenlock-Ludlow boundary beds in Estonia.  Proceedings of the Estonian Academy of Sciences. Geology   40,   2,   43-49. DOI:10.3176/geol.1991.2.02
Kõrts, A., Einasto, R., Männil, Ralf, Radionova, E. 1990. Calcareous algae. pp. 97-100.  Estonian Academy of Sciences. 
Radionova, E., Einasto, R. 1986. The algal communities, their facies relations in the East Baltic Wenlock and Ludlow.  Theory and practice of ecostratigraphy, pp. 163-185.   Valgus. 
List of species
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Classification
| Organism group | Biota | 
| Domain | Eubacteria | 
| Phylum | Cyanobacteria | 
| Class | Porostromata | 
| Family | Cyanophyceae | 
| Genus | Acuasiphonoria | 
| Apophoretella | |
| Bavlinella | |
| Bevocastria | |
| Bija | |
| Botomaella | |
| Cayeuxia | |
| Gloeocapsomorpha | |
| Hedstroemia (Cyanobacteria) | |
| Ortonella | |
| Species | furcata | 
| Genus | Ostiana | 
| Razumovskia | |
| Sphaerocodium | |
| Spongiostroma | |
| Subtifloria | |
| Zonotrichites |