Species
Acrograptus filiformis (Tullberg, 1880)
Synonymy list
1880     Didymograptus filiformis — Tullberg , pp. 42, fig. 2:8-11
1880     Didymograptus filiformis — Lapworth , pp. 20
1901     Didymograptus filiformis — Törnquist , fig. 3:6-9
1902     Didymograptus filiformis — Ruedemann , pp. 556
1915     Didymograptus filiformis — Bassler , pp. 432
1930     Didymograptus filiformis — Monsen , pp. 122, fig. 2:5,12,13,18
1933     Didymograptus filiformis — Ruedemann , pp. 137
1947     Didymograptus filiformis — Ruedemann , pp. 333, fig. 54:54-60
2012     Acrograptus filiformis (Tullberg, 1880) — Li et al. , pp. 118, fig. 5j-m
Selection of related publications
Kaljo, D. 1974. On graptolite zones of Tremadoc and Arenig of Pribaltic and Moscow syneclises.  Graptolites of the USSR, pp. 31-36.   Nauka. 
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Hemichordata | 
| Class | Pterobranchia | 
| Subclass | Graptolithina | 
| Suborder | Sinograptina | 
| Family | Sigmagraptidae | 
| Genus | Acrograptus | 
| Species | affinis | 
| euodus | |
| filiformis | |
| gracilis | |
| nicholsoni | |
| pusillus | 
References based on distribution
- Ulst et al., 1982 Tremadocian
 - Kaljo, 1974 Adze 6 borehole Lower Ordovician