Species
Xiphograptus norvegicus (Berry, 1964)
Synonyymit
1964 Didymograptus robustus norvegicus — Berry , pp. 105, fig. Pl. 7:1-4
2006 Xiphograptus norvegicus (Berry) — Chen et al. , fig. figs. 6A–B
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Hemichordata |
| Class | Pterobranchia |
| Subclass | Graptolithina |
| Order | Graptoloidea |
| Suborder | Dichograptina |
| Family | Pterograptidae |
| Genus | Xiphograptus |
| Species | formosus |
| lofuensis | |
| norvegicus | |
| patulentis | |
| robustus |