201:(OMZ) between 875 and 1,200 meters (2,800 to 4,000 feet) deep — even when the sea floor is significantly deeper. The worms are neutrally buoyant, and have been observed floating along with their mouth parts facing downward, and their hind parts towards the ocean surface. As these worms have shown no ability to swim or otherwise propel themselves through the water, and have no long, protruding appendages to catch prey with, they must rely on filter feeding to survive. Current theories suggest that they reside in the oxygen minimum zone because of its cornucopia of detritus and
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habitat for their species. Their unusual size (five to ten times larger than any known chaetopterid larvae) might indicate they were adults, but all currently known species of chaetopterid adults prefer to live in the benthic environment, and live in parchment-like tubes on the sea floor. Comparison
240:. It is unknown whether the specimens found to date were adult or larval forms. As chaetopterid worms do not spend a predetermined amount of time as planktonic larva, it is possible that the specimens found were actually larva that had simply been unable to settle in an appropriate
278:
when physically stimulated. This bioluminescence is produced as a bright blue light that endures for 3 to 6 seconds. Additionally, the worm will produce very small bioluminescent green particles that are dispersed into its mucous cloud, and glow for 1 to 2 seconds before fading.
194:), and bears a strong resemblance to a disembodied pair of buttocks. Because of this, it was given a Latin species name that roughly translates to "resembling a pig's rear."
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The worm has a segmented body, but the middle segments are highly inflated, giving the animal a round shape. These
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in 2007. The worm is round in shape, approximately 10 to 20 millimeters in length (roughly the size of a
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to larval morphology has indicated that the specimens have a close relationship to either genus
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constructed from mitochondrial and ribosomal DNA sequences from twelve different
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Osborn, Karen J.; Rouse, Greg W.; Goffredi, Shana K.; Robison, Bruce H. (2007).
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205:, and that the worms produce clouds of mucus to capture particles of food and "
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worms found them to be most closely related to other worms of the genus
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Halanych, Kenneth M.; Cox, L. Nicole; Struck, Torsten H. (2007).
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186:, is a species of worm first described by scientists at the
350:, an Unusual Pelagic Polychaete (Annelida, Chaetopteridae)"
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209:," which they later draw into their mouths and ingest.
197:The worm has been observed residing just below the
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213:has been found to feed mainly on pelagic
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298:"A brief review of holopelagic annelids"
188:Monterey Bay Aquarium Research Institute
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408:
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302:Integrative and Comparative Biology
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346:"Description and Relationships of
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1:
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234:morphological characteristics
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274:has been found to produce
579:Animals described in 2007
418:Chaetopterus pugaporcinus
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348:Chaetopterus pugaporcinus
175:Chaetopterus pugaporcinus
157:Chaetopterus pugaporcinus
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32:Scientific classification
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25:Chaetopterus pugaporcinus
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270:In laboratory settings,
178:, commonly known as the
354:The Biological Bulletin
229:, and marine protists.
16:Species of annelid worm
217:, as well as pelagic
139:C. pugaporcinus
199:oxygen minimum zone
315:10.1093/icb/icm086
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533:Open Tree of Life
410:Taxon identifiers
257:phylogenetic tree
236:are unique among
223:silicoflagellates
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392:. Archived from
366:10.2307/25066579
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252:Mesochaetopterus
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276:bioluminescence
272:C. pugaporcinus
227:dinoflagellates
211:C. pugaporcinus
184:flying buttocks
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82:Pleistoannelida
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396:on 2013-04-14.
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261:Chaetopteridae
219:foraminiferans
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115:Chaetopteridae
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148:Binomial name
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394:the original
360:(1): 40–54.
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308:(6): 872–9.
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265:Chaetopterus
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247:Chaetopterus
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180:pigbutt worm
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126:Chaetopterus
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574:Polychaetes
203:marine snow
568:Categories
283:References
95:Sedentaria
249:or genus
133:Species:
55:Kingdom:
49:Eukaryota
499:11743217
473:10545155
433:Q7193261
427:Wikidata
390:34041551
382:17301330
374:25066579
324:21669766
255:, and a
192:hazelnut
111:Family:
105:Spionida
69:Annelida
65:Phylum:
59:Animalia
45:Domain:
486:6785205
242:benthic
121:Genus:
101:Order:
551:605520
525:605520
512:352265
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166:, 2007
164:Osborn
546:WoRMS
538:42112
494:IRMNG
447:80368
386:S2CID
370:JSTOR
89:Clade
76:Clade
520:OBIS
507:NCBI
481:GBIF
460:TDYR
442:BOLD
378:PMID
320:PMID
207:snow
468:EoL
455:CoL
362:doi
358:212
310:doi
182:or
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332:^
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306:47
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225:,
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