Baseodiscus is a genus of nemerteans belonging to the family Valenciniidae.
The genus has cosmopolitan distribution.
In 2025, a Baseodiscus punnetti was reported that has lived for at least 26 years.Baseodiscus the Eldest: First Report of a Decades-Long Lifespan in a Nemertean Species, 02 December 2025 Species Species:
Baseodiscus abyssorum Baseodiscus alpha Baseodiscus anocellatus Baseodiscus antarcticus Baseodiscus antillensis Baseodiscus aureus Baseodiscus australis Baseodiscus bilineatus Baseodiscus cingulatus Baseodiscus delineatus Baseodiscus discolor Baseodiscus edmondsoni Baseodiscus filholi Baseodiscus giardii Baseodiscus hemprichii Baseodiscus indicus Baseodiscus jonasii Baseodiscus longissimus Baseodiscus lumbricoides Baseodiscus maculosus Baseodiscus mexicanus Baseodiscus minor Baseodiscus multiporatus Baseodiscus nipponensis Baseodiscus pallidus Baseodiscus pellucidus Baseodiscus pholidotus Baseodiscus platei Baseodiscus princeps Baseodiscus punnetti Baseodiscus quinquelineatus Baseodiscus rugosus Baseodiscus sordidus Baseodiscus sulcatus Baseodiscus takakurai Baseodiscus unicolor Baseodiscus unistriatus Baseodiscus univittatus
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