Willette, Demian A; Iñiguez, Abril R; Kupriyanova, Elena K; Starger, Craig J; Varman, Tristan; Toha, Abdul Hamid; Maralit, Benedict A; Barber, Paul H. (2015). Christmas tree worms of Indo-Pacific coral reefs: untangling the Spirobranchus corniculatus (Grube, 1862) complex. Coral Reefs. 34(3): 899-904.

197114

10.1007/s00338-015-1294-y [view]

Willette, Demian A; Iñiguez, Abril R; Kupriyanova, Elena K; Starger, Craig J; Varman, Tristan; Toha, Abdul Hamid; Maralit, Benedict A; Barber, Paul H.

2015

34(3): 899-904

Publication

https://link.springer.com/article/10.1007%2Fs00338-015-1294-y

World Polychaeta Database (WPolyDb). Online 01 April 2015, print issue date September 2015

Christmas tree worm is the common name of a group of colorful serpulid polychaetes from the genus Spirobranchus that are symbionts of hermatypic corals. As is increasingly common with reef-associated organisms, Spirobranchus is arranged as a complex of species with overlapping geographic ranges. Current species delimitations based largely on opercular morphology are problematic because of high intraspecific variation. Here, a multi-gene phylogeny of the Spirobranchus corniculatus complex, which tentatively includes S. corniculatus, S. cruciger, and S. gaymardi, sampled from the Coral Triangle, Australia, and Fiji, was reconstructed to test whether the complex includes three genetically distinct lineages identifiable by their opercula. Maximum-likelihood analyses of nuclear and mitochondrial markers revealed a single, monophyletic clade for the S. corniculatus complex. Furthermore, the genetic and morphological variation observed is not geographically based, indicating that the former S. corniculatus complex of three morphospecies is a single, morphologically variable species across the Central Indo-Pacific. Resolving the taxonomy of S. corniculatus presents novel opportunities to utilize this tentative bio-indicator species for monitoring reef health.

Indo West Pacific Region

Systematics, Taxonomy

Polychaeta

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