Species
Orthambonites inaequalis Rubel, 1961
Type specimen data
holotype: Department of Geology, TalTech GIT 125-90, Kuusalu, Kunda Stage (Kunda Stage, Aluaja Substage, Ubari Member; Barriwilian) 
Synonymy list
1961     Orthambonites ? inaequalis sp. nov. — Rubel , pp. 179-180, fig. 12: 8-10
Selection of related publications
Rubel, M. P. 1961. Lower-Ordovician brachiopods of the superfamilies Orthacea, Dalmanellacea and Syntrophiacea of Eastern Baltic.  ENSV TA Geoloogia Instituudi Uurimused   VI,      141-226.
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Brachiopoda | 
| Subphylum | Rhynchonelliformea | 
| Class | Rhynchonellata | 
| Order | Orthida | 
| Suborder | Orthidina | 
| Superfamily | Orthoidea | 
| Family | Orthidae | 
| Genus | Orthambonites | 
| Species | calligramma | 
| fundata | |
| inaequalis | |
| kreklingensis | |
| majuscula | |
| novitas |