|Title||An inordinate fondness for Osedax (Siboglinidae: Annelida): Fourteen new species of bone worms from California|
|Publication Type||Journal Article|
|Year of Publication||2018|
|Authors||Rouse GW, Goffredi S.K, Johnson S.B, Vrijenhoek RC|
|Type of Article||Article|
|Keywords||annelida; atlantic; boneworms; deep-sea; dwarf males; females; marine worms; Siboglinidae; system; taxonomy; Ultrastructure; whale; zoology|
We incorporate DNA sequences from a comprehensive sampling of taxa to provide an updated phylogeny of Osedax and discuss the remarkable diversity of this clade of siboglinids. We formally describe 14 new species of Osedax from Monterey Bay, California, USA, raising the total number of properly named Osedax species to 25. These new species had formerly been recognized by informal names in various publications, and on GenBank. The descriptions document the occurrence of dwarf males in five of the new species. The distribution for the 19 species of Osedax known to occur in Monterey Bay across depths from 385 to 2898 meters and various bone substrates is documented. The exploitation of extant bird and marine turtle bones by Osedax is reported for the first time.
Fossil and molecular evidence indicate that the origin of Osedax dates into the Cretaceous period (Danise & Higgs 2015; Taboada et al. 2015; Vrijenhoek et al. 2009). In this sense Osedax resembles the radiation of vestimentiferans, but no records exist for such high species diversity among vestimentiferan or frenulate siboglinids in comparably small geographic areas as in Monterey Bay. Given that Osedax was first described in 2004, it seems likely that many more species remain to be discovered in the world’s oceans.