| Polysacos Temporal range: 335 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓ | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Polyplacophora |
| Order: | †Multiplacophora |
| Genus: | †Polysacos Vendrasco et al., 2004 |
| Species: | †P. vickersianum |
| Binomial name | |
| †Polysacos vickersianum Vendrasco et al., 2004 | |
Polysacos is an extinct genus of multiplacophorans (chitons) 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. It was fringed with a ring of hollow spines resembling those of the Ordovician Echinochiton.
References
- ^ 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.
| Taxon identifiers | |
|---|---|
| Polysacos | |
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