391:) is narrow, usually with parallel sides and rounded front. The furrow between the occipital ring and the more frontal parts of the glabella are a pair of pits low on its sides beneath a large median spine extending from the glabella backwards. The distance between the glabella and the border (or preglabellar area) is usually long. This border has dozens of small furrows radiating inward (a so-called scrobiculate border), but this defining feature may be absent in effaced species or destroyed by poor preservation. The axis of the pygidium has four to ten rings.
133:
110:
608:
364:
343:
that lived during the final Lower
Cambrian (late Toyonian) and the Middle Cambrian. They are small or very small, and have a thorax of two or three segments. Eodiscidae includes nine genera (see box).
387:
in-between, each consisting of a horizontal inner portion that abruptly passes into an inclined outer portion (fulcrate). The central raised area of the cephalon (or
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649:
528:
683:
440:
Part O, Treatise on
Invertebrate Paleontology. Revised, Volume 1 β Trilobita β Introduction, Order Agnostida, Order Redlichiida
413:
Treatise on
Invertebrate Paleontology Part O, Revised, Volume 1 β Trilobita β Introduction, Order Agnostida, Order Redlichiida
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Jell, P.A. (1975). "Australian Middle
Cambrian Eodiscoids with a review of the superfamily".
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Like other agnostids, the body of eodiscids is diminutive, the headshield (or
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The
Eodiscids probably descended from the agnostids of family
623:
371:, 2mm, showing scrobiculate border and glabellar spine
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122:, 6mm, from Kaili, Guizhou, China, Middle Cambrian
383:) are of approximately same size, with 2 or 3
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438:H.B. Whittington; et al., eds. (1997).
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367:Internal moult of the cranidium of
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428:Palaeontographica Abteilung A
622:. You can help Knowledge by
411:Whittington, H. B. (1997).
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684:Cambrian first appearances
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128:Scientific classification
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38:Lower and Middle Cambrian
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618:-related article is a
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581:Paleobiology Database
379:) and tailshield (or
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119:Pagetia taijiangensis
689:Cambrian extinctions
679:Cambrian trilobites
674:Trilobite families
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568:Open Tree of Life
456:Taxon identifiers
385:thoracic segments
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16:(Redirected from
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35:Temporal range:
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694:Agnostida stubs
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313:Aulacodiscidae
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325:Pagetiellinae
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624:expanding it
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319:Opsidiscidae
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542:iNaturalist
488:Wikispecies
359:Description
316:Dawsoniidae
295:Sinopagetia
253:Helepagetia
207:Eodiscoidea
663:Categories
494:Eodiscidae
464:Eodiscidae
395:References
353:Yukoniidae
341:trilobites
334:Eodiscidae
274:Opsidiscus
260:Kiskinella
220:Eodiscidae
165:Arthropoda
32:Eodiscidae
669:Eodiscina
616:Agnostida
436:cited in
322:Pagetidae
288:Pagetides
267:Macannaia
194:Agnostida
180: (?)
178:Trilobita
151:Kingdom:
145:Eukaryota
18:Eodiscids
473:Wikidata
389:glabella
381:pygidium
377:cephalon
347:Taxonomy
338:agnostid
305:Synonyms
246:Dawsonia
239:Eodiscus
213:Family:
161:Phylum:
155:Animalia
141:Domain:
573:5129189
534:3266643
521:4319744
479:Q989966
434:: 1β97.
281:Pagetia
230:Genera
187:Order:
171:Class:
560:116505
547:522118
614:This
586:90399
555:IRMNG
620:stub
529:GBIF
43:Preκ
516:EoL
508:9RF
503:CoL
432:150
665::
583::
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430:.
403:^
355:.
93:Pg
651:e
644:t
637:v
626:.
442:.
415:.
217:β
204:β
191:β
175:β
98:N
88:K
83:J
78:T
73:P
68:C
63:D
58:S
53:O
48:κ
20:)
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