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Jenkins' Spire Shell (Potamopyrgus antipodarum)

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description Jenkins' Spire Shell (Potamopyrgus antipodarum) Overview

Potamopyrgus antipodarum is a small freshwater snail native to New Zealand and commonly known as Jenkins’ spire shell or the New Zealand mud snail. It has a tall, many-whorled shell and can reproduce rapidly, allowing introduced populations to spread through rivers, lakes, and other freshwater systems. Outside its native range, it is treated as an invasive species because dense populations can alter food webs and compete with native invertebrates.

help Jenkins' Spire Shell (Potamopyrgus antipodarum) FAQ

Where is Jenkins' spire shell native to?

Potamopyrgus antipodarum is native to New Zealand. It is also widely known as the New Zealand mud snail.

Why is Potamopyrgus antipodarum considered invasive in some places?

It can reproduce rapidly and introduced populations can spread through rivers, lakes, and other waterways. Dense populations may compete with native small invertebrates for food and space.

How can I identify Jenkins' spire shell?

Look for a small freshwater snail with a tall shell made of many whorls. The high spire is the reason for the common name Jenkins' spire shell.

How does the New Zealand mud snail spread?

It can be moved between waterways on wet gear, boats, equipment, or animals. Cleaning and drying equipment between waters is an important way to reduce accidental transfer.

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