From Wikipedia, the free encyclopedia

Polysacos
Temporal range: 335   Ma
O
S
D
C
P
T
J
K
N
Scientific classification Edit this 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. [1] It was fringed with a ring of hollow spines resembling those of the Ordovician Echinochiton. [1]

References

  1. ^ a b 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.


From Wikipedia, the free encyclopedia

Polysacos
Temporal range: 335   Ma
O
S
D
C
P
T
J
K
N
Scientific classification Edit this 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. [1] It was fringed with a ring of hollow spines resembling those of the Ordovician Echinochiton. [1]

References

  1. ^ a b 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.



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