[6] Despite the slight variety in habitats, the total area of occurrence has been calculated to be as low as 40 km2 (15 sq mi).

However, the reproduction frequency of the snails allows them to maintain a population despite the variable conditions of the sandy habitats.

The habitats are threatened not only by wind and water that can shift the sand dunes, but also by land conversion, off-road recreation, and the invasion of non-native plants.

[8] The life cycle of these snails is made up of two parts based on the dry and rainy weather of the Mediterranean climate regions of California.

Most individual growth and reproduction occurs during the rainy season, when moisture conditions are ideal for feeding.

[8] The reproductive cycle of the banded dune snail can be compared to other related Helminthoglypta species.

Similarly to those species, the snails are hermaphroditic, meaning that all have both male and female reproductive organs.

Prior to mating, which occurs after the first significant downpours of the wet season, they often engage in courtship behaviors to attract partners, which may include the exchange of pheromones.

After mating, the female parts of the snail fertilize the eggs, then they are laid in shallow holes in sandy soil covered by leaves to protect them from predators or other environmental threats.