Species
Hormograptus sphaericola (Öpik, 1928)
Type specimen data
Synonymy list
1928     Thallograptus sphaericola nov. gen. et nov. sp. — Öpik , pp. 36, fig. 3:16-18; 4:2
1930     Hormograptus sphaericola — Öpik , pp. 8
1958     Chaunograptus sphaericola (Öpik) — Obut & Rytzk , pp. 139
1960     Chaunograptus sphaericola — Obut , pp. 150, fig. 4:1, 1a-b
1964     Chaunograptus sphaericola (Öpik) — Obut , pp. 306, fig. 3:#; text fig. 36
Selection of related publications
Obut, A. M. 1960. Correlation of some parts of  Estonian Ordovician and Silurian deposits according to graptolites.  ENSV TA Geoloogia Instituudi Uurimused   V,      143-157.
Öpik, A. 1930. Beiträge zur Kenntnis der Kukruse-(C2-C3-)Stufe in Eesti. IV.  Tartu Ülikooli Geoloogia Instituudi Toimetused   24,      1-34.
Öpik, A. 1928. Beiträge zur Kenntnis der Kukruse-(C2-C3-) Stufe in Eesti. III.  Tartu Ülikooli Geoloogia Instituudi Toimetused   12,      1-42.
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Hemichordata | 
| Class | Pterobranchia | 
| Subclass | Graptolithina | 
| Family | Wimanicrustidae | 
| Genus | Hormograptus | 
| Species | cervus | 
| defensor | |
| densitubularis | |
| luhai | |
| ramulus | |
| sphaericola | 
References based on distribution
- Öpik, 1928a Vanamõisa, Harjumaa Kukruse Stage
- Obut, 1960 Uniküla Kukruse Stage