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272:, two genera of enormous species with dorsal shields around one meter in diameter. The Psammosteids were the only heterostracans to survive to the end of the Devonian, where they finally perish during the
260:, then that genus, instead, would be the oldest psammosteid. However, its placement within Heterostraci remains a matter of debate. Other notable psammosteids include
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16:Extinct suborder of jawless fishes
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367:. You can help Knowledge by
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439:Devonian jawless fish stubs
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356:This article related to a
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50:Drepanaspis gemuendenensis
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58:Scientific classification
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434:Pteraspidomorphi stubs
27:Temporal range: ?
414:Devonian jawless fish
419:Devonian extinctions
299:This article about
238:of Early Devonian
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301:Pteraspidomorphi
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274:Hangenberg event
176:Weigeltaspididae
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144:Pteraspidiformes
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248:Drepanaspididae
218:also called as
196:Psammolepididae
186:Guerichosteidae
181:Drepanaspididae
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52:reconstruction
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369:expanding it
361:jawless fish
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216:Psammosteida
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157:Psammosteida
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131:Heterostraci
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24:Psammosteida
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263:Psammosteus
235:Drepanaspis
224:pteraspidid
161:Kiaer, 1932
408:Categories
280:References
269:Obruchevia
150:Suborder:
124:Subclass:
230:agnathans
167:Families
81:Kingdom:
75:Eukaryota
358:Devonian
95:Chordata
91:Phylum:
85:Animalia
71:Domain:
33:Devonian
29:Silurian
240:Germany
137:Order:
111:Class:
105:Agnatha
266:, and
363:is a
303:is a
365:stub
305:stub
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174:?
154:†
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31:-
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