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Jardinella thaanumi (Pilsbry, 1900)

Diagnostic features

This is one of three riverine species found in NE Australia that have similar shell morphology. This one differs from J. tumorosa in having a narrow bursal duct and from J. tullyensis in having rounded shoulders.


Jardinella thaanumi (Pilsbry, 1900)

Class Gastropoda

Subclass Caenogastropoda

Order Littorinimorpha 

Superfamily Truncatelloidea

Family Tateidae

Genus Jardinella Iredale & Whitley,1938

Original name: Petterdiana thaanumi Pilsbry, 1900. Pilsbry, H. A. (1900). A new NE Australian amnicoloid. The Nautilus 13: 144.

Type locality: "near Cairns, Queensland" (Type restricted to Barron River by Ponder (1991).

Biology and ecology

Found in shaded clear flowing creeks and river with rock and gravel beds.


Found in rivers and streams flowing eastward from the Atherton tableland (Johnston and Barron Rivers etc.) in north Queensland with the exception of the Mulgrave River.


The very narrow or closed umbilicus and the inner lip which forms a shelf over the umbilical chink are characteristic.

Further reading

Perez, K. E., Ponder, W. F., Colgan, D. J., Clark, S. A. & Lydeard, C. (2005). Molecular phylogeny and biogeography of Spring-associated hydrobiid snails of the Great Artesian Basin, Australia. Molecular Phylogenetics and Evolution 34: 545-556.

Ponder, W. F. & Clark, G. A. (1990). A radiation of hydrobiid snails in threatened artesian springs in western Queensland. Records of the Australian Museum 42: 301-363.