High Quality Content by WIKIPEDIA articles! Yochelcionella is an extinct genus of basal molluscs which lived during the Tommotian epoch, the first epoch of the Cambrian period. This genus is often reconstructed to resemble snails, (gastropods). Yochelcionella is a type genus in the family Yochelcionellidae. This genus of molluscs possessed shells which were shaped like curved caps, with an exhaust pipe shaped "snorkel" emanating underneath where the apex (point of the shell) curves over. All experts agree that the "snorkel" was used in breathing, with most experts suspecting that it allowed waste water to flow away from the gills. When they were first discovered, they were originally thought to be monoplacophorans. The taxonomy of the genus Yochelcionella has been also like this: class Helcionelloida, order Helcionellida, superfamily Helcionelloidea, family Helcionellidae.

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