New York Natural Heritage Program
Lance Aplexa
Aplexa elongata (Say, 1821)
Lance Aplexa
Family: (Physidae)

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

Federal Protection: Not Listed

State Rarity Rank: S2
A State Rarity Rank of S2 means: Typically 6 to 20 occurrences, few remaining individuals, acres, or miles of stream, or factors demonstrably make it very vulnerable in New York State.

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?
Some freshwater snails can survive the passage through the digestive sytem of birds and fish.

State Ranking Justification [-]
This small freshwater snail has mysteriously and precipitously declined throughout the state and elsewhere over the past 100+ years. As a tempoary pond specialist, it is susceptible to changes in hydrology and habitat destruction as these habitats receive no formal protection in New York. The overall range of this boreal species is clearly retreating northward toward Canada suggesting that a warming climate is having adverse effects on its life history strategy in the mid latitudes. The S2 ranking could be revised in light of any potential future survey efforts confirming its status.

Short-term Trends [-]

Long-term Trends [-]