Species
Spinachitina tvaerensis Grahn, Nõlvak et Paris, 1996
Synonymy list
1996     Spinachitina tvaerensis sp. n. — Grahn, Nõlvak & Paris , pp. 30, 32, fig. 2:4,7,8; 3:6,11
Selection of related publications
Nõlvak, J. 2003. Distribution of Ordovician chitinozoans.  Estonian Geological Sections Bulletin   5,      23-25.  Geological Survey of Estonia. 
Grahn, Y., Nõlvak, J., Paris, F. 1996. Precise chitinozoan dating of Ordovician impact events in Baltoscandia.  Journal of Micropalaeontology   15,      21-35.
Occurrence in samples (CONOP) 
Kandava 25 puurauk : 1 sample(s)
Mehikoorma 421 puurauk : 1 sample(s)
Ruhnu 500 puurauk : 1 sample(s)
Tartu 453 puurauk : 1 sample(s)
Vasknarva 639 puurauk : 1 sample(s)
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Class | Chitinozoa | 
| Order | Prosomatifera | 
| Family | Conochitinidae | 
| Subfamily | Spinachitininae | 
| Genus | Spinachitina | 
| Species | cervicornis | 
| coronata | |
| fossensis | |
| fragilis | |
| harringtoni | |
| maennili | |
| multiradiata | |
| suecica | |
| taugourdeaui | |
| titae | |
| tvaerensis | |
| Subspecies | alaticornis | 
References based on distribution
- Nõlvak, 2003 Ruhnu 500 borehole Kukruse Stage
- Grahn et al., 1996 Tvären 2 borehole Kukruse Stage