Identification
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Caption
Laevapex fuscus, ventral view. The tan mass is the digestive gland. Although the ancylids are pulmonates and have a lung, they also have a pseudobranch (false gill, which is a secondary outgrowth of skin, not a true molluscan ctenidium) to aid in respiration. The triangular, lobulated pseudobranch is clearly evident in this view.
Dr. John B. Burch, Ph.D. 
(photographer, copyright holder), Mollusk Division, Museum of Zoology, University of Michigan
