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Location
The Tetraphis pellucida is the most common species in the family and is usually found in decidious forests. Tetraphis geniculta and Tetrodontium brownianum are both rarely found in northern latitudes

Anatomy
The most notable anatomy structure in the Tetraphidaceae family is the four teeth that make up the peristome. The teeth are whole, thick-walled cells which classifies the moss family as nematodontous.

History of taxonomy
The phylogeny and taxonomy of the Tetraphidaceae family have long been disputed among bryologists. Some bryologist believe that features like the "Thalloid flaps" or thalloid protonema indicate that the moss exhibits primitive traits and may share a common ancestor with Sphagnidae and Andreaeidae