Formerly recognized genus of liverworts
Cryptothallus is a previously recognized genus of liverworts in the family Aneuraceae. The plants are small, and are white to pale green as a result of lacking chlorophyll. This feature led to the creation of a separate genus. The morphology of species assigned to "Cryptothallus" is very similar to that of "Aneura". As a result, Karen Renzaglia in 1982 suggested that the only species then placed in the genus, "Cryptothallus mirabilis", may be considered "merely as an achlorophyllous species of "Aneura"." Wickett and Goffinet argued the same position on the basis of sequences of nuclear, mitochondrial, and plastid DNA, and moved "Cryptothallus mirabilis" to "Aneura". A 2010 molecular phylogenetic study confirmed the position of "Cryptothallus" within "Aneura". This was accepted in the 2016 world checklist of hornworts and liverworts.
Species.
Two species were formerly placed in the genus.
References.
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