Species
Tetragraptus headi (Hall, 1858)
Synonymy list
1858 Graptolithus headi — Hall , pp. 161
1865 Graptolithus headi — Billings , pp. 228, fig. 236
1865 Graptolithus headi — Hall , pp. 8, fig. 6:8
1868 Graptolithus (Loganograptus) headi — Hall , pp. 174, fig. 4
1868 Tetragraptus headi — Nicholson , pp. 131
1872 Tetragrapsus headi — Nicholson , pp. 66, fig. 36
1898 Tetragraptus headi — Elles , pp. 486, fig. 11
1902 Tetragraptus headi — Elles et Wood , pp. 59, fig. 5:3a-b
1912 Tetragraptus cf. headi — Hoek , pp. 226, fig. 12:6
1947 Tetragraptus headi (Hall) — Ruedemann , pp. 301, fig. 51:33
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.
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Hemichordata |
| Class | Pterobranchia |
| Subclass | Graptolithina |
| Order | Graptoloidea |
| Suborder | Dichograptina |
| Family | Tetragraptidae |
| Genus | Tetragraptus |
| Species | amii |
| askerensis | |
| astericus | |
| bigsbyi | |
| cor | |
| crucifer | |
| gracilis | |
| headi | |
| krapperupensis | |
| longus | |
| mobergi | |
| norvegicus | |
| phyllograptoides | |
| pseudobigsbyi | |
| quadribrachiatus | |
| reclinatus | |
| serra | |
| spinosus | |
| taraxacum | |
| toernquisti |
References based on distribution
- Obut, 1960 Lower Ordovician