The Conchological Society of Great Britain and Ireland | Helping to understand, identify, record, and conserve molluscs

The Shell Cottage, Carton Estate, County Kildare, Ireland

Authors

Evelyn Moorkens

Issue

19

Page

17

Molluschi terrestri e d’acqua dolce della Valle di Susa

Reference

Elena Gavetti, Stefano Birindelli, Marco Bodon & Giuseppe Manganelli. Regione Piemonte Museo Regionale di Scienze Naturali Monografie XLIV 2008. Hardback with dustcover, 273pp. In Italian. ISBN 978-88-86041-71-3. Price €50 + postage.

Review source

Reviewed by Elena Gavetti, Stefano Birindelli, Marco Bodon & Giuseppe Manganelli. (2009)

Originally published in Mollusc World 19

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This work presents the results of a 10 year study to map the mollusc fauna o

L. depressa. Three spawn masses on filamentous algae. Black pigment spot in each ovum. Algal filaments at base of image are colourless, empty tubes after L. depressa feeding. Thicker filaments unused.

Species

Limapontia depressa

Photographer / copyright holder

I.F. Smith

Limapontia depressa habitat. Upper edge of bare mud on tidal river bank. Lower bank not examined as dangerous soft mud. Littleton Warth, Severn Estuary. August 2011

Species

Limapontia depressa

Photographer / copyright holder

I.F. Smith

L. depressa habitat, Oct 2010; edges of pool on grazed salting by tidal River Dee, Flintshire. Inundating water at high tide <3 p.p.t. salinity. Nearby, in Aug.1946, N.F. McMillan made first discovery of L. depressa in N. Wales (Her site now destroyed).

Species

Limapontia depressa

Photographer / copyright holder

I.F. Smith

L. depressa habitat; ditch on salt marsh with no surface water, half km from nearest channel that fills at Mean H.W. With abundant Assiminea grayana. Water extracted from mud not to liking of the slugs; distorted and climbed out. Dee, Chesh. July 2011.

Species

Limapontia depressa

Photographer / copyright holder

I.F. Smith

Limapontia depressa. L.1-2.5mm. Submerged (salinity >30p.p.t.) in shallow channel draining muddy sand. About 1000/ sq. metre. Apparently feeding on orange-brown growth (possibly diatoms) coating the substrate. Menai Strait, Wales. April 2010.

Species

Limapontia depressa

Photographer / copyright holder

I.F. Smith

Limapontia depressa habitat. Large algal mat in summer and autumn. In April, when mat reduced, L. depressa are juveniles on substrate film in shallow drainage channels, salinity >30 p.p.t. Menai Strait, Wales. October 2009.

Species

Limapontia depressa

Photographer / copyright holder

I.F. Smith

Limapontia depressa. L. 4mm. Fully exposed on algal mat on wet mud. Salting at this level inundated every day at high tide by water over 31p.p.t. salinity. October 2009. Menai Strait, Wales.

Species

Limapontia depressa

Photographer / copyright holder

I.F. Smith

Illustration by T. Gascoigne (1975) with no head ribs on L. depressa. Metapodium tip of L. depressa usually smaller than shown. Metapodium on L. capitata usually larger than shown. Anus often difficult to locate on live animals.

Species

Limapontia depressa

Photographer / copyright holder

Copyright Conch. Soc. & estate of T. Gascoigne