In 2012, it was declared extinct by the IUCN Red List of Threatened Species.

The shell was carried upside down with the aperture on the right, and this made it appear to be dextral.

Species Neoplanorbis tantillus was originally described by Henry Augustus Pilsbry in 1906.

Pilsbry's original text (the type description) reads as follows: Neoplanorbis tantillus n. sp.

Shell very narrowly perforate, slightly convex above, very convex below, with a strongly projecting rounded keel at the periphery; light brown; surface slightly shining, sculptured with very obliquely radial growth-lines and raised spiral stride, rather coarse for a shell of this size.