Polysacos
| Polysacos vickersianum Temporal range: 335 Ma | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Sub-classis: | Polyplacophora |
| Order: | †Multiplacophora |
| Genus: | †Polysacos |
| Species: | † P. vickersianum |
| Binomial name | |
| Polysacos vickersianum Vendrasco et al., 2004 | |
Polysacos is a genus of multiplacophoran known from articulated Carboniferous fossils; its seventeen shell plates are arranged in three rows, with seven iterated units. It demonstrates that multiplacophora are related to modern polyplacophora.[1] It was fringed with a ring of hollow spines resembling those of the Ordovician Echinochiton.[1]
References
- ↑ 1.0 1.1 Vendrasco, M. J.; Wood, T. E.; Runnegar, B. N. (2004). "Articulated Palaeozoic fossil with 17 plates greatly expands disparity of early chitons". Nature 429 (6989): 288–291. Bibcode:2004Natur.429..288V. doi:10.1038/nature02548. PMID 15152250.