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132:
967:
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in that, as the specific epithet suggests, the scales of the former are more robustly proportioned than those of the latter. Fossil specimens also show a rib that is modified by being narrow at the ends and gradually broadens and rises towards the middle of the scale, where a major elevation is
374:
Blom, Henning, T. Märss, and C. G. Miller. "Silurian and earliest
Devonian birkeniid anaspids from the Northern Hemisphere." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 92.03 (2001): 263-323.
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suggest the living animal reached a length of up to 10.0 cm (3.9 in), and was an active swimmer. In addition to whole specimens and scale microfossils of
913:
376:
1068:
1112:
1102:
1107:
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1122:
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1117:
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305:. Birkeniid anaspids are covered by a series of small plates on the head and rod-shaped scales in a cheveron-like pattern on the trunk.
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926:
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438:
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392:"New birkeniid anaspid from the Lower Devonian of Scotland and its phylogenetic implications"
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891:
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Fossil fishes of Great
Britain (Volume 16 of Geological conservation review series)
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885:
775:
598:
326:, which are found in Great Britain and Scandinavia, scales of a second species,
202:
43:
876:
754:
689:
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509:
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are found in Late
Silurian strata of Scandinavia and Estonia. The scales of
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strata of
Northern Europe, and Middle Silurian to possibly Earliest
339:
developed that is expressed as a raised and slightly angled ridge.
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851:
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437:. Joint Nature Conservation Committee. pp. 38, 46 (675).
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431:Dineley, David L. & Metcalf, S. J. (1999).
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27:
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1113:Early Devonian fish of North America
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1103:Llandovery genus first appearances
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1108:Early Devonian genus extinctions
1022:
965:
832:
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818:
417:10.1111/j.1475-4983.2012.01142.x
349:
130:
16:Extinct genus of jawless fishes
1123:Prehistoric jawless fish stubs
1093:Silurian fish of North America
1:
1118:Fossil taxa described in 1899
1041:. You can help Knowledge by
981:. You can help Knowledge by
275:Blom, Märss and Miller, 2002
318:Intact fossil specimens of
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1030:This article related to a
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390:Blom, Henning (May 2012).
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127:Scientific classification
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117:
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30:
975:prehistoric jawless fish
19:Not to be confused with
1098:Silurian fish of Europe
315:
289:is a genus of extinct
1128:Silurian animal stubs
973:This article about a
940:Paleobiology Database
334:differ from those of
311:
118:Fossil and model of
39:Telychian–Lochkovian
408:2012Palgy..55..641B
357:Paleontology portal
316:
1050:
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990:
989:
955:
954:
927:Open Tree of Life
854:Taxon identifiers
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301:strata of Arctic
293:fish from Middle
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237:†Birkenia elegans
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835:
834:
822:
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729:"Naked anaspids"
681:Septentrioniidae
626:Rhyncholepididae
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313:Life restoration
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36:Temporal range:
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767:Euphaneropidae
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588:Vilkitskilepis
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402:(3): 641–652.
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790:Cornovichthys
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727:
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718:Trimpleylepis
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713:
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711:Spokoinolepis
708:
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704:Septentrionia
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589:
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583:
582:
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576:
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571:
569:
568:
567:Ramsaasalepis
564:
562:
561:
557:
555:
554:
553:Pharyngolepis
550:
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222:Traquair 1898
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26:
22:
1043:expanding it
1029:
983:expanding it
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746:
739:
716:
709:
702:
695:
688:
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656:Schidiosteus
654:
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642:Rhyncholepis
640:
633:
615:Hoburgilepis
613:
607:
606:
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572:
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560:Pterygolepis
558:
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546:Kerreralepis
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256:B. campbelli
255:
236:
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229:Type species
216:
215:
119:
31:
25:
886:Wikispecies
797:Euphanerops
776:Achanarella
670:Vesikulepis
649:Rytidolepis
599:Birkeniidae
581:Tahulalepis
508:Subphylum:
328:B. robusta,
203:Birkeniidae
1082:Categories
755:Cyclostomi
697:Manbrookia
690:Liivilepis
663:Silmalepis
635:Maurylepis
574:Ruhnulepis
539:Cowielepis
510:Vertebrata
343:References
336:B. elegans
332:B. robusta
324:B. elegans
320:B. elegans
272:B. robusta
264:B. elegans
120:B. elegans
741:Jamoytius
496:Kingdom:
150:Kingdom:
144:Eukaryota
21:Birkeniae
1088:Anaspida
1032:Silurian
892:Birkenia
877:Q2753026
871:Wikidata
862:Birkenia
837:Category
783:Ciderius
748:Lasanius
608:Birkenia
525:Anaspida
504:Chordata
502:Phylum:
498:Animalia
486:Anaspida
299:Devonian
295:Silurian
286:Birkenia
248:Species
217:Birkenia
196:Family:
177:Anaspida
164:Chordata
160:Phylum:
154:Animalia
140:Domain:
32:Birkenia
932:4949833
919:1301048
906:4815419
404:Bibcode
291:anaspid
209:Genus:
183:Order:
170:Class:
1035:animal
441:
303:Canada
1037:is a
977:is a
945:34134
914:IRMNG
1039:stub
979:stub
901:GBIF
439:ISBN
44:PreꞒ
412:doi
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410:.
400:55
398:.
394:.
382:^
367:^
94:Pg
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447:.
420:.
414::
406::
213:†
200:†
187:†
174:†
99:N
89:K
84:J
79:T
74:P
69:C
64:D
59:S
54:O
49:Ꞓ
23:.
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