Cantharidus turneri
A New Zealand endemic top snail from southern shores.
Cantharidus turneri is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. Originally described as Margarella turneri by Arthur William Baden Powell in 1939, later research placed it in the genus Cantharidus within the subfamily Cantharidinae. It is endemic to the southern shores of New Zealand.
Quick Facts
- Taxon
- Cantharidus turneri
Facts from the source article.
Lore & Background
The shell of Cantharidus turneri grows to a length of 9 mm and a diameter of 8 mm. This top snail is endemic to the southern shores of New Zealand. It has been found around Stewart Island, including Ulva Island in Paterson Inlet, and has also been recorded on the Snares, Auckland, and Campbell Islands further south. The species inhabits the low intertidal to shallow subtidal zone, where it lives on seaweed-covered rocks near low tide level. The holotype was collected under such conditions at Stewart Island.
Reader's Guide
Cantharidus turneri is notable as a marine gastropod mollusk in the family Trochidae, originally described as Margarella turneri by Arthur William Baden Powell in 1939. Later research placed it in the genus Cantharidus within the subfamily Cantharidinae, reflecting taxonomic refinement. Its distribution is restricted to the southern shores of New Zealand, including Stewart Island, the Snares, Auckland, and Campbell Islands, making it a geographically constrained species. The shell dimensions—9 mm in length and 8 mm in diameter—provide a clear morphological marker. Its habitat on seaweed-covered rocks in the low intertidal to shallow subtidal zone, with the holotype collected under such conditions at Stewart Island, underscores its ecological niche. The species is documented in authoritative references such as Powell's 1979 work and the 2009 New Zealand inventory of biodiversity, ensuring its place in malacological records. Its significance lies in its endemic status and the taxonomic history that shifted it from Margarella to Cantharidus.
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