Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A small opening in the mantle of a pulmonate gastropod through which air passes.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[From New Latin pneumostoma : pneumo– + Greek stoma, mouth.]

Examples

  • We found it by encouraging my nine year old to look up "pneumostome" online after he read it in the Funny Pages/Prime Baby in the NYTimes Magazine.

    An almost perfect Valentine’s Day card for a malacologist

  • You can see the pneumostome (breathing hole) of the of the snail on the right.

    Archive 2009-06-01

  • The right tentacle is recognizable (blue arrow) and so is the pneumostome, the breathing hole (green arrow).

    Archive 2009-01-01

  • Note how in both species the ureter, instead of running directly towards the mantle collar, first goes down, turns around and then goes up towards the pneumostome, near which it drains to the outside.

    Archive 2009-01-01

  • Abbreviations: P, the outside opening of the pneumostome (breathing hole); MC, mantle collar (the front edge of the mantle that is fused to the top of the head in a live snail); K, kidney, V, ventricle; A, auricle (the ventricle and the auricle together make up the heart); R, rectum (its opening is within the pneumostome); L, lung.

    Archive 2009-01-01

  • It clearly shows in the slug in the back the separate locations of the genital opening from which the penis is everted and the pneumostome, the large hole to the right of it.

    Archive 2009-01-01

  • From the position of the pneumostome near the back end of the mantle, I can deduce that this was probably one of the Limax species.

    Beasts and Bestiaries: a book about how they used to illustrate animals

  • The hole on the right side that Linnaeus refers to was most likely the conspicuous pneumostome, the breathing hole.

    Archive 2009-01-01

  • Abbreviations: P, the outside opening of the pneumostome (breathing hole); MC, mantle collar (the front edge of the mantle that is fused to the top of the head in a live snail); K, kidney, V, ventricle; A, auricle (the ventricle and the auricle together make up the heart); R, rectum (its opening is within the pneumostome); L, lung.

    The mantle cavity of Rumina saharica

  • We will now look forward to the next thaw in Wisconsin so we can observe a pneumostome live.

    An almost perfect Valentine’s Day card for a malacologist

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