Opisthostoma fraternum is a species of minute land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae. It is endemic to Malaysia. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.
Opisthostoma mirabile is a species of air-breathing land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae.
Opisthostoma otostoma is a species of minute land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae.
Opisthostoma perspectivum is a species of minute land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae. This species is endemic to Malaysia. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.
Diplommatinidae is a family of small land snails with an operculum, terrestrial gastropod mollusks in the superfamily Cyclophoroidea. The Cochlostomatinae Kobelt, 1902, were previously considered a subfamily of the Diplommatinidae, but are now known to be a separate family.
Opisthostoma vermiculum is a species of minute land snail with an operculum, a terrestrial gastropod mollusk or micromollusk in the family Diplommatinidae. The shell possesses four different coiling axes; the most for any known living gastropod. This member of the Diplommatinidae family is endemic to Malaysia. Its natural habitat is tropical limestone outcrops.
Everettia is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Dyakiidae.
Atopos is a genus of carnivorous air-breathing land slugs, terrestrial pulmonate gastropod mollusks in the family Rathouisiidae.
Plectostoma concinnum is a species of air-breathing land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae.
Plectostoma laidlawi is a species of air-breathing land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae.
Plectostoma sciaphilum was a species of land snail in the family Diplommatinidae. This species was originally found on a single limestone karst at Bukit Panching, in Peninsular Malaysia. In 2007, this karst was quarried, thus destroying the only known site of occurrence for this species. Plectostoma species are allopatric, being in found in dozens of isolated karst hills where few species occur, meaning that limited gene flow exists and only negligible hybridization occurs. Shell is distinctly convex, tuba shape similar to that of Plectostoma senex and P. turriforme, but this species lacks basal constriction teeth. Shell height: 2.6–2.9 mm, width: 1.5–1.6 mm.
Acmella nana is a species of land snail discovered from Borneo, Malaysia, in 2015. It was described by Jaap J. Vermeulen of the JK Art and Science in Leiden, Thor-Seng Liew of the Institute for Tropical Biology and Conservation at the Universiti Malaysia Sabah, and Menno Schilthuizen of the Naturalis Biodiversity Center in Leiden. It was named nana due to its minute size. Measuring only 0.7 millimeters in size, it is the smallest known land snail as of 2015. It surpasses the earlier record attributed to Angustopila dominikae, which is 0.86 mm in size, described from China in September 2015.
Acmella is a genus of minute, land snails with an operculum, gastropod mollusks, or micromollusks, in the family Assimineidae.
Plectostoma obliquedentatum is a species of air-breathing land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae.
Henrigirardia wienini is a species of terrestrial gastropod in the family Moitessieriidae endemic to caves near Aniane, France. It is the sole species in the genus Henrigirardia. H. wienini inhabits subterranean waters in two localities in the Fontanilles cave-river, and the type locality in the Herault Valley. It is listed by the IUCN as Critically Endangered with the caveat 'possibly extinct' on IUCN criterion B1ab(iii) due to threats from ongoing water abstraction for domestic and agricultural purposes. Although it is not as significant or possibly not present, agricultural and domestic pollution can be dangerous to subterranean species. Specimens grow to 1.5mm, and have a characteristic thrown-out last whorl and aperture. The tuba ends on an out turned aperture that reflexes up to 90 degrees upwards.
