This is one of three riverine species found in NE Australia that have similar shell morphology. The very narrow or closed umbilicus and the inner lip which forms a shelf over the umbilical chink are characteristic of this species.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
Infraclass Caenogastropoda
Order Littorinida
Suborder Rissoidina
Superfamily Truncatelloidea
Family Tateidae
Genus Jardinella Iredale & Whitley,1938
Original name: Petterdiana thaanumi Pilsbry, 1900. In 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).
Found in shaded clear flowing creeks and the main river; rock and gravel beds, typically beneath rocks.
Found in rivers and streams flowing eastward from the Atherton Tablelands (Johnston and Barron Rivers, etc.) in north Queensland, with the exception of the Mulgrave River.
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.
