Species
Sphenoecium johanssoni (Bengtson et Urbanek, 1986)
Synonyymit
1986 Rhabdotubus johanssoni — Bengtson & Urbanek , pp. 296, fig. Fig. 1-9
2015 Sphenoecium johanssoni (Bengtson and Urbanek, 1986) — Maletz & Steiner , pp. 1098
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Hemichordata |
| Class | Pterobranchia |
| Subclass | Graptolithina |
| Order | Rhabdopleuridae |
| Genus | Sphenoecium |
| Species | discoidalis |
| filicoides | |
| johanssoni | |
| mesocambricus | |
| obuti | |
| robustus | |
| tubularis | |
| wheelerensis |