| Polystomurum Temporal range:
| |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Clade: | Arachnomorpha |
| Subphylum: | Chelicerata |
| Clade: | Euchelicerata (?) |
| Genus: | †Polystomurum Novojilov, 1958 |
| Type species | |
| †Polystomurum stormeri Novojilov, 1958
| |
Polystomurum is a Devonian genus from Siberia, Russia (then the Soviet Union). It was initially described by Nestor Novojilov in 1958 as a eurypterid with affinities to Marsupipterus inside the family Stylonuridae. Nowadays, it is classified as incertae sedis inside Euchelicerata.[1][2]