Gyropena is a genus of two species of tiny pinwheel snails that are endemic to Australia's Lord Howe Island in the Tasman Sea.MolluscaBase eds. (2021). MolluscaBase. Gyropena Iredale, 1944. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=818299 on 2021-07-12
Species Gyropena minuta Shea & Griffiths, 2010 – Mount Gower pinwheel snail Gyropena verans Iredale, 1944 – sunken-spired pinwheel snail
Description The shells of these snails are 0.9–1.5 mm in height, with a diameter of 1.9–2.9 mm. The colour is golden-brown to pale fawn. The shape is discoidal with a low or sunken spire, whorls shouldered and sutures impressed, with prominent radial ribs. The umbilicus is widely open. The aperture is roundly lunate.
Habitat These snails are found at the southern end of the island, on the summits and slopes of Mount Lidgbird and Mount Gower, in leaf litter.
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