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302:) consists of 14 to 21 segments ending in sickle-shaped spines that to the back curve increasingly further backwards (Paradoxididae) or in bluntly truncated tips (Centropleuridae). While in the Paradoxididae the frontal two segments may be more robust, the thorax of the Centropleuridae is characterize by longer backward directed sickle shaped spines on the three rear thoracic segments. The tailshield (or
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Species in this superfamily can be average (under 10 cm) to very large (over 30 cm), are relatively flat, have an inverted egg-shaped outline, a glabella that in early genera has parallel sides and expands forward in later representatives, and approaches or reaches the frontal border. All
298:) with long backward directed genal spines. The facial suture in front of the eye diverges forward and outward in the Paradoxididae, while in the Centropleuridae it runs outward and even a bit backward (or retrodivergent). The articulate middle part of the body (or
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Thorax with 14-16 segments with rounded or truncated tips, except for the three next to the pygidium which are tipped with sickle-shaped spines. Pygidium medium-sized with two or three pairs of marginal
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Thorax with 15-21 segments tipped with sickle-shaped spines, frontal two may be enlarged. Pygidium small with an entire margin.
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Part O, Revised, Volume 1 – Trilobita – Introduction, Order
Agnostida, Order Redlichiida
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294:species have an almost semicircular headshield (or
368:Prodrom einer Monographieder bohmischen Trilobiten
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380:Whittington, H.B.; et al., eds. (1997).
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366:HAWLE, J. & CORDA, A. J. C. 1847.
386:Treatise on Invertebrate Paleontology
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281:) and disappeared at the end of the
30:upper Lower Cambrian–Middle Cambrian
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16:Extinct superfamily of trilobites
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273:. They occurred during the late
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257:Hawle & Corda 1847, are a
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370:. 176 pp. J. G. Calve, Prague
547:. You can help Knowledge by
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609:Cambrian first appearances
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119:Scientific classification
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619:Arthropod superfamilies
543:-related article is a
506:Paleobiology Database
614:Cambrian extinctions
423:at Wikimedia Commons
604:Cambrian trilobites
388:. pp. 470–481.
310:Key to the families
624:Redlichiida stubs
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433:Taxon identifiers
419:Media related to
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599:Redlichiina
541:Redlichiida
465:Wikispecies
289:Description
259:superfamily
195:Redlichiina
182:Redlichiida
111:Paradoxides
588:Categories
354:References
271:arthropods
263:trilobites
188:Suborder:
156:Arthropoda
169:Trilobita
142:Kingdom:
136:Eukaryota
456:Q1229831
450:Wikidata
304:pygidium
296:cephalon
279:Toyonian
226:families
152:Phylum:
146:Animalia
132:Domain:
498:9073687
340:spines.
269:marine
267:extinct
175:Order:
162:Class:
511:134214
300:thorax
219:, 1847
215:&
539:This
217:Corda
213:Hawle
545:stub
253:The
35:PreꞒ
493:EoL
485:5GB
480:CoL
261:of
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342:→
324:→
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85:Pg
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318:1
277:(
205:†
192:†
179:†
166:†
90:N
80:K
75:J
70:T
65:P
60:C
55:D
50:S
45:O
40:Ꞓ
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