Shallow-water holothuroids (Echinodermata) of Yap, Federated States of Micronesia By Sun W. Kim*, Allison K. Miller, Catherine Brunson, Kristin Netchy, Ronald M. Clouse, Daniel Janies, Emmanuel Tardy, and Alexander M. Kerr Abstract In December 2002, July 2007 and December 2009, we surveyed the sea cucumber fauna of the western Caroline Island of Yap (Federated States of Micronesia). We collected 37 species of holothuroids, including 32 species of aspidochirotes and five species of apodans. We found all 13 of the previously reported species and 24 new records for the islands—19 aspidochirotes and five apodans. At least two of the new records appear to be previously undescribed species. Types of microhabitats and reef zonation were closely correlated with the species distributions of Yapese holothuroids.. *Corresponding Author E-mail:
[email protected] Pacific Science, vol. 68, no. 3 February, 10, 2014 (Early view) Introduction Coral reefs are among the most biologically diverse marine ecosystems, yet they are threatened by climate change, overexploitation, eutrophication and ocean acidification (Hughes 1994, Reaka-Kudla 1997, Bruno et al. 2009). The currently known 93,000 coral reef associated species are estimated to only represent a small portion of the actual diversity (Reaka- Kudla 1997). In addition, many species have not been seen since their original descriptions, often over a century ago, causing ongoing taxonomic confusion. This taxonomic confusion is not limited to rare species; statuses of even some common species remain in flux. We clearly have much to learn about the alpha diversity of coral reefs (Reaka-Kudla 1997, Bouchet et al. 2002, Michonneau et al.