Monoplacophora

thumb|Shell of Monoplacophora Monoplacophora , meaning "bearing one plate", is a polyphyletic class 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.

Neopilina is a highly derived genus of modern monoplacophoran.

Tryblidiida is a taxon of monoplacophoran molluscans containing the only extant representatives: 37 species are still alive today, inhabiting the ocean at depths of between .

species of mollusc

species of mollusc

species of mollusc

species of mollusc

Micropilina is a genus of monoplacophoran molluscs. They are very small, mostly deepwater animals which have a superficially limpet-like shell.

species of mollusc

species of mollusc

species of mollusc

species of mollusc

Laevipilina is a genus of monoplacophoran molluscs. They are very small, mostly deepwater animals which have a superficially limpet-like shell. All species are at approximately 2–3 mm in length, have 5 pairs of gills (except for Laevipilina hyalina, which has 6 pairs), and have 4–5 intestinal coils.

species of mollusc

species of mollusc

species of mollusc

species of mollusc

species of mollusc

species of mollusc

species of mollusc

species of mollusc

Veleropilina is a living genus of monoplacophoran, once described as a limpet, and is known from fossil deposits.

species of mollusc

genus of molluscs

species of mollusc

species of mollusc

species of mollusc

Rokopella is a genus of living monoplacophoran.

species of mollusc

species of mollusc

species of mollusc