Species
Holmograptus spinosus (Ruedemann, 1904)
Synonyymit
2009 Holmograptus spinosus (Ruedemann, 1904) — Maletz , pp. 10, fig. Figs. 3E, 3F, 5G, 5L–5N, 6F, 6H
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Hemichordata |
| Class | Pterobranchia |
| Subclass | Graptolithina |
| Suborder | Sinograptina |
| Order | Sinograptidae |
| Genus | Holmograptus |
| Species | callotheca |
| lentus | |
| spinosus |