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Description and Relationships of Chaetopterus pugaporcinus, an Unusual Pelagic Polychaete (Annelida, Chaetopteridae)

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dc.contributor.author Osborn, Karen J. en
dc.contributor.author Rouse, Greg W. en
dc.contributor.author Goffredi, Shana K. en
dc.contributor.author Robison, Bruce H. en
dc.date.accessioned 2017-11-16T19:10:43Z
dc.date.available 2017-11-16T19:10:43Z
dc.date.issued 2007
dc.identifier.citation Osborn, Karen J., Rouse, Greg W., Goffredi, Shana K., and Robison, Bruce H. 2007. "<a href="https://repository.si.edu/handle/10088/33980">Description and Relationships of Chaetopterus pugaporcinus, an Unusual Pelagic Polychaete (Annelida, Chaetopteridae)</a>." <em>Biological Bulletin</em>. 212 (1):40&ndash;54. <a href="https://doi.org/10.2307/25066579">https://doi.org/10.2307/25066579</a> en
dc.identifier.issn 0006-3185
dc.description.abstract An extraordinary new species, Chaetopterus pugaporcinus, is described from eight specimens collected from deep mesopelagic waters off Monterey Bay, California, by remotely operated vehicles. All specimens exhibit a consistent combination of both adult and larval characteristics, leaving in question the maturity of the specimens. All specimens lack ciliated larval bands and the stout, modified chaetae (cutting spines) typically found in segment A4 of chaetopterids. If the specimens described here are larvae, they are remarkable for their size, which ranged from 10 to 21 mm total length, nearly twice the length of the largest polychaete larvae previously reported and 5 to 10 times larger than known chaetopterid larvae. Then too, their lack of segment addition prior to settlement would be atypical. If adult, they are particularly unusual in their habitat choice and body form. Morphology of the uncini and comparison to larval morphology indicated a close relationship to either Chaetopterus or Mesochaetopterus. However, the lack of cutting spines and typical adult morphology made it impossible to determine to what genus this species should be allied. Thus, we carried out the first molecular phylogenetic analysis of the Chaetopteridae in order to appropriately place and name the new species. Three partial genes were sequenced for 21 annelid species. The sequencing also provides the first molecular evidence that Chaetopterus variopedatus sensu Hartman (1959) is not a single cosmopolitan species. The question of C. pugaporcinus being a delayed larva or a genuine holopelagic chaetopterid is discussed. en
dc.relation.ispartof Biological Bulletin en
dc.title Description and Relationships of Chaetopterus pugaporcinus, an Unusual Pelagic Polychaete (Annelida, Chaetopteridae) en
dc.type Journal Article en
dc.identifier.srbnumber 102215
dc.identifier.doi 10.2307/25066579
rft.jtitle Biological Bulletin
rft.volume 212
rft.issue 1
rft.spage 40
rft.epage 54
dc.description.SIUnit NH-Invertebrate Zoology en
dc.description.SIUnit NMNH en
dc.description.SIUnit pre_SI en
dc.citation.spage 40
dc.citation.epage 54

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