Monoplacophora

Monoplacophora; Temporal range:
	The holotype of Neopilina galatheae at the Zoological Museum, Copenhagen
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Subphylum:	Conchifera
Class:	Monoplacophora; Odhner, 1940

Monoplacophora /ˌmɒnoʊpləˈkɒfərə/, meaning "bearing one plate", is a polyphyletic superclass of molluscs with a cap-like shell, inhabiting deep sea environments. Extant representatives were not recognized as such until 1952; previously they were known only from the fossil record, and were thought to have become extinct 375 million years ago.^[2]

Although the shell of many monoplacophorans is limpet-like in shape, they are not gastropods, nor do they have any close relation to gastropods.^[1]

^ ^a ^b Taviani, M.; Sabelli, B.; Candini, F. (1990). "A fossil Cenozoic monoplacophoran". Lethaia. 23 (2): 213–216. Bibcode:1990Letha..23..213T. doi:10.1111/j.1502-3931.1990.tb01361.x.
^ ^a ^b Cite error: The named reference Lindberg2009 was invoked but never defined (see the help page).

[ReferenceA-1] Taviani, M.; Sabelli, B.; Candini, F. (1990). "A fossil Cenozoic monoplacophoran". Lethaia. 23 (2): 213–216. Bibcode:1990Letha..23..213T. doi:10.1111/j.1502-3931.1990.tb01361.x.

[Lindberg2009-2] Cite error: The named reference Lindberg2009 was invoked but never defined (see the help page).

[1]

[2]

Monoplacophora Temporal range:

The holotype of Neopilina galatheae at the Zoological Museum, Copenhagen
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Subphylum:	Conchifera
Class:	Monoplacophora Odhner, 1940