Xolotrema is a genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 (or subgenus under Triodopsis

Triodopsis

Triodopsis is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Polygyridae.-Species:* Triodopsis hopetonensis - magnolia three-tooth, magnolia threetooth...

) of air-breathing land snail

Land snail

A land snail is any of the many species of snail that live on land, as opposed to those that live in salt water and fresh water. Land snails are terrestrial gastropod mollusks that have shells, It is not always an easy matter to say which species are terrestrial, because some are more or less...

s, terrestrial

Terrestrial animal

Terrestrial animals are animals that live predominantly or entirely on land , as compared with aquatic animals, which live predominantly or entirely in the water , or amphibians, which rely on a combination of aquatic and terrestrial habitats...

 pulmonate gastropod mollusks in the family Polygyridae

Polygyridae

Polygyridae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea.The Polygyridae make up a significant proportion of the land snail fauna of eastern North America, and are also found in western North America, northern Central America, and...

.

Shell description

Pilsbry (1940) characterized the shell of Xolotrema (which he considered to be a subgenus) thus:

"Triodopses, in which the inner margin of the basal lip has a long bladelike lamella, terminating at a notch where it joins the outher arc of the lip; the embryonic whorls are covered with close retractive radial striae (subobsolete in T. fosteri)."

Species within the genus Xolotrema

• Xolotrema notata
  Xolotrema notata
  Xolotrema notata is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Polygyridae....
  
  
• Xolotrema obstricta
• Xolotrema carolinensis
• Xolotrema fosteri