633:
128:
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294:, a dorsal fin and an anal fin near the rearmost third of its body. Earlier reconstructions depict the creature as having side-fins running the length of its body, starting from behind the branchial openings to the tip of its tail: new research demonstrates that such "fins" are actually deformations of the bodywall as the corpse was being squished post-burial. In life,
332:
vertebrate known. Since then, it has been reclassified by many workers as having many different affinities, such as an "unspecialized anaspid", or as a sister taxon to the lampreys, its difficulty in classification due to difficulties in reconstructing the anatomy; it does not possess any usual
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resembled a lamprey with a very small mouth. Because the fossil had no teeth, teeth-like structures, nor suggestions of either in its mouth, it was not carnivorous like many modern
501:
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1128:
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384:
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302:. It was more likely to have been a filter-feeder or a detritus-feeder, possibly in the manner of larval lampreys.
290:. It had an elongated body, and is thought to have had, in comparison with relatives known from intact bodies like
127:
309:- features that suggest that it was a basal member of that clade. It is also the earliest known vertebrate with
502:"New evidence on Jamoytius kerwoodi White, an important ostracoderm from the Silurian of Lanarkshire, Scotland"
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was originally named by Errol White on the basis of two specimens (the generic name is a reference to
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Sansom, Robert S; Kim
Freedman; Sarah E Gabbott; Richard J. Aldridge; Mark A. Purnell (2010).
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Today, G.; Blom, Henning; MΓ€rss, Tiiu (2003). "Fossils explained 43: Anaspid fishes".
461:"Taphonomy and Affinity of an Enigmatic Silurian Vertebrate, Jamoytius Kerwoodi White"
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The fish had a cartilaginous skeleton, and a branchial basket resembling the
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Ritchie, A. (1960). "A new interpretation of
Jamoytius kerwoodi White".
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409:, a new chordate from the Silurian of Lanarkshire [Scotland]"
149:
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Baltimore: The Johns
Hopkins University Press, 1996.
328:) and, at the time, it was considered to be the most
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365:The Rise of Fishes: 500 Million Years of Evolution
280:is now recognized as the best-known member of the
313:. It also possessed weakly mineralised scales.
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653:
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276:Long thought of as a "basal anaspid,"
7:
253:is an extinct species of primitive,
16:Extinct genus of jawless vertebrates
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1021:
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631:
554:10.1046/j.1365-2451.2003.00413.x
486:10.1111/j.1475-4983.2010.01019.x
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344:is now placed in its own order
1:
1134:Fossil taxa described in 1946
403:White, E.I. (March 1, 1946).
265:in Scotland, dating to the
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1129:Silurian animals of Europe
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425:10.1017/S0016756800082856
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123:Scientific classification
121:
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23:
515:: 21β39. Archived from
354:and similar agnathans.
263:Patrick Burn Formation
1124:Silurian jawless fish
1091:Paleobiology Database
500:Ritchie, A. (1968).
639:Paleontology portal
603:1960Natur.188..647R
577:The Ancestor's Tale
477:2010Palgy..53.1393S
413:Geological Magazine
317:History of research
1082:Jamoytius kerwoodi
1052:Jamoytius kerwoodi
407:Jamoytius kerwoodi
250:Jamoytius kerwoodi
235:Jamoytius kerwoodi
1106:
1105:
1044:Taxon identifiers
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1034:
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1000:
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574:Dawkins, Richard
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40:443.8β427.4
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919:"Naked anaspids"
871:Septentrioniidae
816:Rhyncholepididae
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471:(6): 1393β1409.
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348:, together with
326:J. A. Moy-Thomas
311:camera-type eyes
267:Llandovery epoch
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214:J. kerwoodi
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31:Llandovery Epoch
29:Temporal range:
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363:Long, John A.
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346:Jamoytiiformes
338:synapomorphies
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542:Geology Today
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522:on 2011-07-16
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509:Palaeontology
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269:of the Early
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223:Binomial name
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35:Wenlock Epoch
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832:Rhyncholepis
830:
823:
805:Hoburgilepis
803:
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762:
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750:Pterygolepis
748:
741:
736:Kerreralepis
734:
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524:. Retrieved
517:the original
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436:. Retrieved
419:(2): 89β97.
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349:
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282:Hyperoartian
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259:jawless fish
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24:
18:
1076:Wikispecies
987:Euphanerops
966:Achanarella
860:Vesikulepis
839:Rytidolepis
789:Birkeniidae
771:Tahulalepis
698:Subphylum:
351:Euphanerops
342:J. kerwoodi
307:cyclostomes
296:J. kerwoodi
292:Euphanerops
278:J. kerwoodi
241:White, 1946
186:Jamoytiidae
1113:Categories
945:Cyclostomi
887:Manbrookia
880:Liivilepis
853:Silmalepis
825:Maurylepis
764:Ruhnulepis
729:Cowielepis
700:Vertebrata
526:2007-10-31
438:2007-10-31
390:References
931:Jamoytius
686:Kingdom:
562:129511577
322:Jamoytius
207:Species:
200:Jamoytius
146:Kingdom:
140:Eukaryota
25:Jamoytius
1119:Anaspida
1061:Wikidata
1027:Category
973:Ciderius
938:Lasanius
798:Birkenia
715:Anaspida
694:Chordata
692:Phylum:
688:Animalia
676:Anaspida
433:86329654
335:chordate
300:lampreys
273:period.
271:Silurian
179:Family:
160:Chordata
156:Phylum:
150:Animalia
136:Domain:
619:4214197
599:Bibcode
473:Bibcode
232:†
211:†
192:Genus:
166:Order:
1067:Q46680
617:
591:Nature
560:
431:
371:
257:-like
1096:34137
615:S2CID
558:S2CID
520:(PDF)
505:(PDF)
429:S2CID
330:basal
285:order
369:ISBN
48:Preκ
607:doi
595:188
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421:doi
255:eel
33:to
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98:Pg
42:Ma
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668:e
661:t
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621:.
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423::
405:"
196:β
183:β
170:β
103:N
93:K
88:J
83:T
78:P
73:C
68:D
63:S
58:O
53:κ
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