Species
Cystomatochilina umbonata (Krause, 1892)
Synonymy list
1892     Primitia (Ulrichia?) umbonata n. sp. — Krause , pp. 389, fig. 21:10-11
1933     Platychilina (=Primitia) umbonata (Krause) — Kummerow , pp. 45
1934     Eurychilina (Coelochilina) umbonata (Krause) — Bassler et Kellett , pp. 317
1954     Platybolbina umbonata (Krause, 1892) — Henningsmoen , pp. 91, fig. 4:1-3
1957     Cystomatochilina umbonata (Krause) — Jaanusson , pp. 254-255, fig. 16
1962     Cystomatochilina umbonata (Krause) — Sarv , pp. 100-101, fig. 1:1
1992     Cystomatochilina umbonata (Krause) — Sidaravičiene , pp. 139, fig. 35:8-10
1996     Cystomatochilina umbonata (Krause, 1892) — Meidla , pp. 25, fig. 2:4-5
Selection of related publications
Meidla, T. 1996. Late Ordovician Ostracodes of Estonia. Fossilia Baltica 2. pp. 1-222.  Tartu University Press. 
Meidla, T. 1996. Latest Ordovician ostracodes of Baltoscandia.  Danmarks Geologiske Undersøgelse      98,   63-68.  GEUS. 
Sarv, L. I. 1962. Ostracods from the Porkuni stage and Llandovery of Estonia.  ENSV TA Geoloogia Instituudi Uurimused   IX,      95-141.
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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 | Cystomatochilina | 
| Species | clivosa | 
| plicata | |
| umbonata | |
| Cystomatochilina matura | 
References based on distribution
- Meidla, 1996a Orjaku borehole 53.5 - 77.9 Nabala Stage
- Meidla, 1996a Puhmu 567 borehole 76.2 - 90.7 Nabala Stage
- Sidaravičiene, 1992 Kalvarija borehole 865.3 -
- Sidaravičiene, 1992 [Duplicate record of 10284] Lapes borehole 660.3 - 676.6
- Sidaravičiene, 1992 Vangishki 205 borehole 381.9 - 389.8
- Sarv, L., 1962 Porkuni
- Meidla, 1996a Russalu quarry
- Meidla, 1996a Seli-Metsküla quarry
- Meidla, 1996b Siuge quarry
- Meidla, 1996a Seli-Russalu quarry