Genus
Gellensia Schallreuter, 1967
Selection of related publications
Meidla, T. 1996. Late Ordovician Ostracodes of Estonia. Fossilia Baltica 2. pp. 1-222.  Tartu University Press. 
Schallreuter, R. 1982. On Gellensia nodoreticulata Schallreuter sp. nov..  A Stereo-Atlas of Ostracod Shells. Volume 9, pp. 105-108.   British Micropalaeontological Society. 
List of species
1. Gellensia gellensis Schallreuter, 1967 | Haljala Stage
2. Gellensia nodoreticulata Schallreuter, 1982 | Upper Ordovician
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Arthropoda | 
| Subphylum | Crustacea | 
| Superclass | Oligostraca | 
| Class | Ostracoda | 
| Subclass | Podocopa | 
| Order | Palaeocopida | 
| Suborder | Beyrichicopina | 
| Palaeocopa | |
| Superfamily | Eurychilinacea | 
| Family | Oepikellidae | 
| Subfamily | Ampletochilininae | 
| Genus | Ampletochilina | 
| Apatochilina | |
| Cystomatochilina | |
| Ectoprimitia | |
| Gellensia | |
| Species | gellensis | 
| nodoreticulata | |
| Genus | Lavachilina | 
| Levisulculus | |
| Moeckowia | |
| Platybolbina | |
| Swantina |