WoRMS source details

Osborn, K.J.; Rouse, G.W.; Goffredi, S.K.; Robison, B.H. 2007. Description and relationships of Chaetopterus pugaporcinus, an unusual pelagic polychaete (Annelida, Chaetopteridae). Biological Bulletin 212(1): 40-54
World Polychaeta Database (WPolyD)
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 eithe r 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.
Pacific, North East (Warm + cold temperate (boreal))
2013-01-12 18:30:12Z

Holotype AHF POLY 2173, geounit Monterey Bay, identified as Chaetopterus pugaporcinus Osborn, Rouse, Goffredi & Robison, 2007

Described from an apparent giant larval planktonic form, unresolved as to whether a delayed larva or a holopelagic ... [details]


named pugaporcinus (based on the following Latin roots and suffix respectively: puga rump; porcus pig; and inus ... [details]

 Type locality

Monterey Bay, California, 36.32° N, 122.89° W, from 1029 m where the seafloor is 3500 m deep. [details]