Pseudotricula expandolabra is similar to P. eberhardi but its shell differs in having a straight spire outline, a taller spire and the whorls are indented slightly below the shoulder.
Pseudotricula expandolabra Ponder, Clark, Eberhard & Studdert, 2005
Class Gastropoda
Infraclass Caenogastropoda
Order Littorinida
Suborder Rissoidina
Superfamily Truncatelloidea
Family Tateidae
Genus Pseudotricula Ponder, 1992
Original name: Pseudotricula expandolabra Ponder, Clark, Eberhard & Studdert 2005. In Ponder, W.F., Clark, S.A., Eberhard, S. & Studdert, J.B. (2005) A radiation of hydrobiid snails in the caves and streams at Precipitous Bluff, southwest Tasmania, Australia (Mollusca: Caenogastropoda: Rissooidea: Hydrobiidae s.l.). Zootaxa 1074: 1-66.
Type locality: Screaming Stals Streamway, Bauhaus, Precipitous Bluff caves, Tasmania.
This species is found in narrow (less than 1 m in width) cave streams with gentle to moderate (<1L/s to about 5L/s estimated flows). The substrate is mixed cobbles, gravel and silt and the microhabitats pools and riffles. Two samples were also found in seepages associated with this type of stream.
Damper Cave (Honey and Cream and Cane Toad Abuse streamways and seep near The Keg) and Bauhaus (Persephone and Screaming Stals streamways and Persephone Pot), Precipitous Bluff caves, southern Tasmania. One of six species known from the caves at Precipitous Bluff.
Ponder, W. F., Clark, S. A., Eberhard, S. & Studdert, J. B. (2005). A radiation of hydrobiid snails in the caves and streams at Precipitous Bluff, southwest Tasmania, Australia (Mollusca: Caenogastropoda: Rissooidea: Hydrobiidae s.l.). Zootaxa 1074: 1-66.
