Species
Megistaspis (Megistaspidella) extenuata (Wahlenberg, 1821)
Synonyymit
1821 Entomostracites extenuatus — Wahlenberg , pp. 295, fig. 8:4
1898 Megalaspis extenuata Wahlb. — Schmidt , pp. 43
1956 Megistaspis (Megistaspidella) extenuata (Wahlenberg, 1821) — Jaanusson , pp. 71-73
1995 Megistaspis (Megistaspidella) extenuata (Wahlenberg, 1821) — Nielsen , pp. 152, fig. 117
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Trilobita |
| Order | Asaphida |
| Superfamily | Asaphoidea |
| Family | Asaphidae |
| Genus | Megistaspis |
| Subgenus | (Megistaspidella) |
| Species | acuticauda |
| bombifrons | |
| convexa | |
| curvispina | |
| extenuata | |
| geminus | |
| gigas | |
| grandis | |
| heros | |
| isvosica | |
| lamanskii | |
| longa | |
| longicauda | |
| obtusicauda | |
| obuchovensis | |
| pseudorudis | |
| spinulata | |
| triangularis |