page_title: Tylomelania
section_title: Description
hierarchical_section_title: Tylomelania / Description
caption_attribution_description: English: Photo of an apertural view of a holotype shell of Tylomelania hannelorae. Holotype MZB Gst. 12.114, scale bar is 10 mm.
context_page_description: Tylomelania is a genus of freshwater snails which have an operculum, aquatic gastropod mollusks in the family Pachychilidae. In the aquarium hobby, snails from this genus are commonly known as "rabbit snails".
  A sister group of Tylomelania is genus Pseudopotamis. Tylomelania and Pseudopotamis split in the Middle Miocene c. 19.5 Mya.
context_section_description: In species within this genus, the albumen gland is very large. Pallial oviduct evolved into an uterine brood (that release shelled juvenile snails).
  Comparison of apertural views of shells of twenty Tylomelania species (images are not to scale):
caption: Tylomelania hannelorae
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