684:
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Lapworthellidae: sclerites occur in something of a morphological continuum, but essentially form a single type with a sinistral and dextral version, possibly with the anterior-most pair of sclerites fusing into a single bilaterally-symmetrical, dual-tipped sclerite.
563:
Guo, Jin; Parry, Luke A.; Vinther, Jakob; Edgecombe, Gregory D.; Wei, Fan; Zhao, Jun; Zhao, Yang; Bรฉthoux, Olivier; Lei, Xiangtong; Chen, Ailin; Hou, Xianguang; Chen, Taimin; Cong, Peiyun (2022).
759:
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from NE Greenland: advancements in knowledge of lapworthellid taxonomy, sclerite growth and scleritome organization. Geol. Mag. (2016). doi:10.1017/S0016756816000698
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and associated fauna from the early
Cambrian of southern Montagne Noire (France): implications for camenellan phylogeny. Palaeontology 57, 979โ1002 (2014).
754:
367:, assuming a slug-like anatomy, had an anterior 'head valve' followed by pairs of asymmetric valves running in pairs along their dorsal surface.
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Murdock, D. J. E., Donoghue, P. C. J., Bengtson, S. & Marone, F. Ontogeny and micro-structure of the enigmatic
Cambrian tommotiid
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400:: three sclerite morphs, one of which (conventionally termed the A morph) is bilaterally symmetrical, the other two occurring in
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have distinct dorsal (symmetrical) and lateral (asymmetric) sclerite morphologies. The same has been asserted for
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Betts, Marissa; Claybourn, Thomas; Brock, Glenn; Jago, James; Skovsted, Christian; Paterson, John (2019).
401:
630:"Early Cambrian shelly fossils from the White Point Conglomerate, Kangaroo Island, South Australia"
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Skovsted, C. B., Betts, M. J., Topper, T. P. & Brock, G. A. The early
Cambrian tommotiid genus
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565:"A Cambrian tommotiid preserving soft tissues reveals the metameric ancestry of lophophorates"
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known from articulated remains, which showed camenellans to be mobile, worm-like animals.
374:- that is the bilaterally symmetric Morph A valve - is thought to have fused from two
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has a similar double-mounded structure at the tip of its A type sclerites.
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from South
Australia. Mem. Assoc. Australas. Palaeontol. 48, 1โ117 (2015).
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Devaere, L. & Skovsted, C. B. New early
Cambrian sclerites of
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Growth rings in all are marked out by prominent external ridges.
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even though that has not always been the common perception.
331:-like construction. This was confirmed by the discovery of
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Missarzhevsky, 1969. Palaeontology 55, 661โ676 (2012).
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Missarzhevsky in
Rozanov & Missarzhevsky, 1966; =
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Reconstruction and life restoration of the camenellan
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period, reconstructed as sister to all others (plus
193:Missarzhevsky in Rozanov & Missarzhevsky, 1966
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760:Paleozoic life of Newfoundland and Labrador
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321:). They are primarily known from isolated
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16:Extinct informal group of invertebrates
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264:Reconstruction of the scleritome of
698:. You can help Knowledge (XXG) by
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571:. Online: S0960โ9822(22)01455โ5.
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755:Paleozoic life of New Brunswick
660:from the original on 2019-08-30
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765:Paleozoic life of Nova Scotia
637:Acta Palaeontologica Polonica
775:Prehistoric protostome stubs
275:, consisting of the genera
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770:Cambrian genus extinctions
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616:Lapworthella schodakensis
578:10.1016/j.cub.2022.09.011
489:Evans & Rowell, 1990
453:Evans & Rowell, 1990
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120:Scientific classification
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355:It has been argued that
745:Prehistoric protostomes
309:invertebrates from the
750:Cambrian invertebrates
650:10.4202/app.00586.2018
433:Bischoff, 1976 (type)
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402:sinistral and dextral
378:separate sclerites.
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370:The 'head valve' in
412:, and questionably
404:variants. Includes
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27:Temporal range:
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481:(Tate, 1892)
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478:D. macroptera
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700:expanding it
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662:. Retrieved
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507:Devaere, L.
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458:D. decobruta
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450:D. braddocki
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398:Laurie, 1986
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372:Lapworthella
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365:Lapworthella
364:
360:
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350:Lapworthella
349:
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303:monophyletic
299:Lapworthella
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243:Wrona, 2004
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233:Lapworthella
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189:
175:
166:
160:"Tommotiida"
110:
18:
315:brachiopods
305:) group of
273:camenellans
176:Camenellans
739:Categories
692:protostome
664:2019-08-30
551:Sunnaginia
495:References
486:D. odyssei
414:Shetlandia
334:Wufengella
294:Wufengella
248:Wufengella
240:Shetlandia
211:Bengtsonia
112:Wufengella
24:Camenellan
587:1879-0445
535:Dailyatia
513:Kelanella
469:Skovsted
466:D. helica
441:Skovsted
438:D. bacata
425:species:
423:Dailyatia
410:Dailyatia
406:Kennardia
380:Dailyatia
361:Kelanella
357:Camenella
346:Camenella
342:Dailyatia
328:Halkieria
323:sclerites
319:phoronids
307:Tommotiid
289:Kelanella
285:Kennardia
281:Dailyatia
277:Camenalla
225:Kennardia
206:Kelanella
198:Dailyatia
190:Camenella
143:Kingdom:
137:Eukaryota
655:Archived
595:36170853
389:Taxonomy
311:Cambrian
147:Animalia
133:Domain:
473:, 2015
445:, 2015
430:D. ajax
219:Sonella
215:Tesella
182:Genera
153:Order:
593:
585:
509:et al.
471:et al.
443:et al.
658:(PDF)
643:(3).
633:(PDF)
696:stub
591:PMID
583:ISSN
408:and
363:and
344:and
317:and
297:and
271:The
35:Pre๊
645:doi
573:doi
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