Biologist Jon Allen Discovers World’s Oldest Ribbon Worm
In a groundbreaking discovery, biologist Jon Allen has identified the world’s oldest ribbon worm known to science. Named Baseodiscus the Eldest, this remarkable invertebrate, affectionately referred to as ‘B’, is estimated to be at least 26 years old, possibly even reaching 30 years of age based on recent analyses.
Measuring approximately a meter (3 feet) in length when fully extended, Baseodiscus has captivated researchers with its longevity, surpassing all previous records within the Nemertea phylum. According to Allen, marine invertebrates like ribbon worms are renowned for their extended lifespans, with deep-sea tube worms capable of living for up to 300 years or more.
Despite the ubiquitous presence of ribbon worms in marine environments, their lifespans remain largely unexplored. Allen’s findings shed light on this enigmatic group of creatures, significantly expanding our understanding of their natural longevity.
Baseodiscus’s Journey
Allen acquired Baseodiscus in 2005 from the University of North Carolina’s biology department, providing a comfortable tank filled with mud for the worm’s leisurely movements. Originally collected as an adult in the late 1990s from the San Juan Islands, Baseodiscus has since traveled across multiple states, residing in Washington, North Carolina, Maine, and now Virginia.
In 2024, a former student of Allen’s persuaded him to conduct genetic testing on Baseodiscus, revealing its species as Baseodiscus punnetti. This genetic analysis marked a significant milestone, as Baseodiscus became only the second individual of its species to undergo genetic barcoding.
Implications for Longevity Research
Allen’s groundbreaking research underscores the importance of studying marine invertebrates for insights into longevity and ecological impacts. By estimating the lifespan of nemerteans like ribbon worms, researchers can better assess the role of these long-lived predators in marine ecosystems.
The study, published in the Journal of Experimental Zoology, signifies a significant advancement in our understanding of ribbon worms and their remarkable lifespans. Baseodiscus the Eldest stands as a testament to the wonders of the natural world, offering a glimpse into the mysteries of marine longevity.
