Thiarid snail from Lake Tanganyika. The spiral ridges, called lirae, add strength to the shell. Lirae are found on many species of gastropods, adding strength to the shell without adding excessively to the weight of the shell.
John B. Burch (photographer; copyright holder), Mollusk Division, Museum of Zoology, University of Michigan-Ann Arbor
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To cite this page: Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2013. The Animal Diversity Web (online). Accessed at http://animaldiversity.org.
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