There Are Easily Over 100,000 Extant Mollusk Species…

…there are barely 7,000 echinoderms.

Dr. M (1720 Posts)

Craig McClain is the Assistant Director of Science for the National Evolutionary Synthesis Center, created to facilitate research to address fundamental questions in evolutionary science. He has conducted deep-sea research for 11 years and published over 40 papers in the area. He has participated in dozens of expeditions taking him to the Antarctic and the most remote regions of the Pacific and Atlantic. Craig’s research focuses mainly on marine systems and particularly the biology of body size, biodiversity, and energy flow. He focuses often on deep-sea systems as a natural test of the consequences of energy limitation on biological systems. He is the author and chief editor of Deep-Sea News, a popular deep-sea themed blog, rated the number one ocean blog on the web and winner of numerous awards. Craig’s popular writing has been featured in Cosmos, Science Illustrated, American Scientist, Wired, Mental Floss, and the Open Lab: The Best Science Writing on the Web.

3 comments on “There Are Easily Over 100,000 Extant Mollusk Species…
  1. That’s 100,000 described buddy. Arthropod lovers always report the estimated “potential” number based on some beatle count in the tropics. How many assumptions does that model have anyway? Seriously, how many arthropods have been described?

  2. I commented below, but they say here in several sources that 83% of described species are arthropods.

    Crustacea alone have ~52,000 species described.

    Don’t let it bug you – mollusks are cool. Crabs think so too.

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