New York Natural Heritage Program
Watercress Snail
Fontigens nickliniana (I. Lea, 1838)
Gastropods
Watercress snail
Family: (Hydrobiidae)

State Protection: Not Listed
The species is not listed or protected by New York State.

Federal Protection: Not Listed

State Rarity Rank: S1S3
A State Rarity Rank of S1S3 means: Critically Imperiled, Imperiled, or Vulnerable in New York -- Conservation status is uncertain, and could range from especially vulnerable to disappearing from New York, to vulnerable to becoming imperiled in New York, due to rarity or other factors. More information is needed to assign a single conservation status.

Global Rarity Rank: G5
A Global Rarity Rank of G5 means: Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.


Did you know?
In North America, 92% of the freshwater snails in the family Hydrobiidae (Pyrg Pebblesnails) are imperiled (Johnson et al., 2013).

State Ranking Justification [-]
It is unclear whether this small snail remains an extant member of New York's Gastropod fauna since the last verfied records were from about 70 years ago (1940s). Since then, one statewide snail survey, and another in central New York, did not turn it up. Further, this species is a habitat specialist that depends on highly stable groundwater conditions in forests, both of which have been highly degraded in the heavily agricultural and urbanized far western region of the state. The rank of S1S3 might need to be revised pending any further survey work in far western NY.

Short-term Trends [-]

Long-term Trends [-]