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These characteristics, combined with its ancient divergence, suggested it had been evolving independently from other Radula species for a very long time. The recognition of Dactyloradula as a separate genus brought the total number of genera in the family Radulaceae to three, alongside Radula and Cladoradula. [3]
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The species was long classified in the genus Radula within subgenus Cladoradula. In 2022, Renner and colleagues conducted a molecular phylogenetics study that revealed the subgenus Cladoradula represents one of the oldest lineages within the family Radulaceae, having diverged from other members during the late Permian period.
Radula is a genus of liverwort in the family Radulaceae. The genus includes 248 species of small plants that typically grow as green, scaly patches on tree trunks, logs, or rocks in moist environments.
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The radula (US: / ˈ r æ dʒ ʊ l ə /; pl.: radulae or radulas) [1] is an anatomical structure used by mollusks for feeding, sometimes compared to a tongue. [2] It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food enters the esophagus .
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The radula is rhipidoglossate. The rhachidian teeth are always present and well-developed. The rhachidian teeth are always present and well-developed. The lateral teeth generally number 5 on each side, sometimes more numerous.