123:
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is known from the maxillae of several individuals in one location. These maxillae reaching 1.32 cm (0.52 in) in length, with one incomplete specimen that supposed to be bigger in full size. These are the largest jaws of any fossil polychaete. A larger fossil jaw had been reported in 1934
377:
would use its large jaws to eat live prey, algae, and decaying matter. However, the jaws of polychaetes do not necessarily designate specific feeding habits, so precise knowledge remains unknown without preserved gut content or soft tissue.
385:
are of a similar large size, which may indicate juveniles and adults had differing environmental preferences and thus would not be preserved together. Though juvenile specimens may have simply not been preserved.
353:
No mandibles were found alongside the maxillae at the site of discovery, which leads to the possibility that these structures could not be preserved or that the maxillae were shed by
551:"Acanthodian and Actinopterygian fish remains from the Itaituba Formation, Late Carboniferous of the Amazon Basin, Brazil, with a note on acanthodian ganoin"
512:"Acanthodian and Actinopterygian fish remains from the Itaituba Formation, Late Carboniferous of the Amazon Basin, Brazil, with a note on acanthodian ganoin"
393:
is unique compared to other
Devonian polychaetes, and the specific driving mechanisms for the increased size, whether intrinsic or extrinsic, are unknown.
335:
could have grown to 1–2 m (3 ft 3 in – 6 ft 7 in) long, though the exact size is unknown without soft tissue preservation.
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are not. However, larvae of these two modern families do have deticulated maxillae, possibly strengthening an ancestral connection between the groups.
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Eller E. R. Annelid jaws from the
Hamilton group of Ontario County, New York. Ann. Carnegie Mus. 24, 51–56 (1934).
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represents the oldest bobbit worm which is about 400 million years old and it is a giant bobbit worm.
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484:"New species of gigantic, toothy worm identified in Canadian fossil collection"
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433:"Earth's oldest 'Bobbit worm' – gigantism in a Devonian eunicidan polychaete"
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616:
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Richter, Martha; Neis, Pedro
Alfredo; Smith, Moya Meredith (1999-11-24).
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Richter, Martha; Neis, Pedro
Alfredo; Smith, Moya Meredith (1999-11-24).
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309:. Websteroprion features first representative of an invertebrate taxon.
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are denticulate (having teeth-like structures), while those of extant
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Eriksson, Mats E.; Parry, Luke A.; Rudkin, David M. (February 2017).
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331:. Referencing the jaw to body size ratio of other polychaetes,
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Neues
Jahrbuch für Geologie und Paläontologie - Monatshefte
516:
Neues
Jahrbuch für Geologie und Paläontologie - Monatshefte
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but that specimen is too undiagnostic so it regarded as a
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due to similarities in jaw structure. If this is true,
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301:The genus was named after the bassist
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482:Mortillaro, Nicole (Feb 24, 2017).
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489:Canadian Broadcasting Corporation
357:while their mandibles were not.
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1:
709:Fossil taxa described in 2017
268:that lived during the middle
567:10.1127/njgpm/1999/1999/728
528:10.1127/njgpm/1999/1999/728
735:
719:Prehistoric annelid genera
365:The feeding practices of
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131:Scientific classification
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23:
608:Websteroprion armstrongi
381:All of the specimens of
305:of the death metal band
235:Websteroprion armstrongi
291:Kwataboahegan Formation
279:. It contains a single
257:("Webster's saw") is a
16:Genus of annelid worms
289:, recovered from the
29:Temporal range: Late
437:Scientific Reports
389:The large size of
371:Eunice aphroditois
214:W. armstrongi
714:Polychaete genera
704:Fossils of Canada
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658:Open Tree of Life
600:Taxon identifiers
450:10.1038/srep43061
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286:W. armstrongi
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223:Binomial name
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493:. Retrieved
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361:Paleoecology
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328:nomen dubium
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303:Alex Webster
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317:Description
41:393.3
693:Categories
397:References
266:polychaete
178:Polychaeta
623:Q31837657
575:0028-3630
536:0028-3630
297:Etymology
263:eunicidan
241:Eriksson
207:Species:
197:Eriksson
154:Kingdom:
148:Eukaryota
617:Wikidata
469:28220886
348:onuphids
344:eunicids
270:Devonian
168:Annelida
164:Phylum:
158:Animalia
144:Domain:
35:Eifelian
663:7491086
637:9387606
495:Oct 18,
460:5318920
281:species
232:†
211:†
184:Genus:
174:Class:
110:↓
33:-Early
676:955989
650:955989
573:
534:
467:
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277:Canada
273:period
245:, 2017
243:et al.
201:, 2017
199:et al.
31:Emsian
671:WoRMS
259:genus
645:OBIS
632:GBIF
571:ISSN
559:1999
532:ISSN
520:1999
497:2022
465:PMID
346:and
49:PreꞒ
563:doi
524:doi
455:PMC
445:doi
261:of
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405:^
293:.
283:,
99:Pg
43:Ma
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499:.
471:.
447::
441:7
188:†
104:N
94:K
89:J
84:T
79:P
74:C
69:D
64:S
59:O
54:Ꞓ
38:~
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