518:
458:
104:
360:
Tarlo, Halstead. "LB t1965) Psammosteiformes tAgnatha)—A review with descriptions of new material from the Lower
Devonian of Poland, II. Systematic Part." Palaeontologia Polonica 15: 168. Pages 20-21
319:, place them within Psammosteida. Because the ornamentation on the plates and scales are very similar to the ornamentation seen on the plates and scales of
559:
417:
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within
Traquairaspidiformes. Still other authorities remain unconvinced of either side, and, instead, follow Denison's lead to simply treat
311:. Rare articulated fossils, plus the overall anatomy of its plates suggest the living animals were, at least superficially, similar to
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to the point of constant confusion, other authorities follow the lead of
Obruchev, and place
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295:. Fossils are known primarily from Early Devonian-aged marine strata of
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are known from Late
Silurian-aged marine strata of Arctic
303:. Fragments and disarticulated plates of what may be of
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16:Extinct genus of jawless fishes
604:Devonian fish of North America
1:
599:Early Devonian fish of Europe
342:
532:. You can help Knowledge by
475:. You can help Knowledge by
315:, some authorities, such as
32:Late Silurian–Early Devonian
7:
594:Enigmatic Heterostraci taxa
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614:Silurian first appearances
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464:This article related to a
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120:Scientific classification
118:
110:
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23:
629:Pteraspidomorphi stubs
293:Early Devonian periods
624:Silurian animal stubs
584:Silurian jawless fish
579:Devonian jawless fish
431:Paleobiology Database
619:Devonian extinctions
287:known from the Late
589:Heterostraci genera
524:This article about
111:Reconstruction of
609:Fossils of Canada
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373:Taxon identifiers
266:
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214:Weigeltaspis alta
113:Weigeltaspis alta
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181:Weigeltaspididae
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29:Temporal range:
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322:Traquairaspis
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534:expanding it
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477:expanding it
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381:Weigeltaspis
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331:Weigeltaspis
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327:Weigeltaspis
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313:psammosteids
305:Weigeltaspis
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270:Weigeltaspis
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218:Brotzen 1933
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207:Type species
200:Brotzen 1933
194:Weigeltaspis
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155:Heterostraci
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25:Weigeltaspis
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277:of extinct
259:Tarlo, 1964
251:Tarlo, 1964
243:Tarlo, 1964
240:W. brotzeni
573:Categories
343:References
256:W. heintzi
248:W. godmani
396:Q19885230
126:Kingdom:
466:Silurian
390:Wikidata
289:Silurian
282:agnathan
224:Species
176:Family:
143:Chordata
138:Phylum:
131:Animalia
423:1152052
410:4817347
232:W. alta
188:Genus:
162:Order:
150:Class:
469:animal
436:149922
309:Canada
301:Canada
297:Europe
528:is a
471:is a
418:IRMNG
317:Tarlo
275:genus
273:is a
530:stub
473:stub
405:GBIF
299:and
291:and
285:fish
37:PreꞒ
333:as
575::
433::
420::
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392::
351:^
339:.
87:Pg
561:e
554:t
547:v
536:.
504:e
497:t
490:v
479:.
92:N
82:K
77:J
72:T
67:P
62:C
57:D
52:S
47:O
42:Ꞓ
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