106:
839:
301:, the shell has no hinge, at least in the earliest examples. It is thought they may have used a hydraulic mechanism. However they later seem to develop a primitive articulation, in which some used a levator mechanism for opening the shell. At the posterior is a ventral valve with a defined flat-shelf. The
364:
Streng, M., A. D. Butler, J. S. Peel, R. J. Garwood, and J.-B. Caron. 2016. A new family of
Cambrian rhynchonelliformean brachiopods (Order Naukatida) with an aberrant coral-like morphology. Palaeontology,
886:
384:
473:
430:
937:
927:
417:
342:
259:
period. The relationship of the
Obolellida with other inarticulates is unclear, and were previously grouped together with the
272:, has been linked to the origin of calcitic shelled brachiopods more generally, hinting that obolellids may be paraphyletic.
942:
374:
Balthasar, U. (2008). ~Mummpikia~ gen. nov. and the origin of calcitic-shelled brachiopods. Palaeontology 51, 263β279.
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297:, and oval or subcircular in shape. They are like other inarticulates in that, as with the
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333:. Vol. Part H Brachiopoda. University of Kansas Press. pp.
127:
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243:. They are essentially restricted to the lower-middle Cambrian.
852:
455:
235:
408:
Lipps, Jere H.; Signor, Philip W. (January 1, 1992).
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255:brachiopods that existed from the early to middle
305:opening can be positioned at various positions.
467:
8:
281:, whose soft-part anatomy is partly known.
849:
633:
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573:
506:
497:
493:
474:
460:
452:
323:Popov, Leonid E.; Holmer, Lars E. (2000).
20:
410:Origin and Early Evolution of the Metazoa
313:Some of these are coral-like creatures.
251:Obolellida is a small, extinct order of
431:"McGraw-Hill AccessScience, Obolellida"
352:
263:, before being given their own order.
330:Treatise on Invertebrate Paleontology
275:Trematobolidae includes taxa such as
211:
182:
7:
14:
837:
104:
30:Lower Cambrian β Middle Cambrian
1:
16:Extinct order of brachiopods
959:
938:Cambrian first appearances
385:"Paleos, Order Obolellida"
928:Prehistoric animal orders
835:
572:
496:
492:
171:
166:
101:Scientific classification
99:
23:
289:The shell is typically
207:Popov and Tikonov 1990
167:Orders & families
900:Paleobiology Database
943:Cambrian extinctions
266:One representative,
217:Streng et al 2016
629:Rhynchonelliformea
325:"Class Obolellata"
148:Rhynchonelliformea
933:Brachiopod orders
915:
914:
855:Taxon identifiers
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845:
833:
832:
829:
828:
623:
622:
619:
618:
568:
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229:
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221:(incomplete list)
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198:(incomplete list)
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433:. Archived from
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387:. Archived from
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27:Temporal range:
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321:Key reference:
319:
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261:Siphonotretacea
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77:
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67:
62:
57:
52:
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37:
29:
28:
25:
17:
12:
11:
5:
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843:
836:
834:
831:
830:
827:
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818:
813:
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806:Billingsellida
802:
800:
791:
790:
788:
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777:
769:
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759:Rhynchonellida
756:
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732:
724:
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711:Rhynchonellata
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535:Siphonotretida
529:
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490:
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481:
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471:
464:
456:
448:
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422:
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307:
286:
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248:
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210:
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192:Trematobolidae
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169:
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3:
2:
955:
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822:
821:Strophomenida
819:
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812:
809:
807:
804:
803:
801:
799:
798:Strophomenata
792:
786:
783:
781:
780:Terebratulida
778:
776:
775:Spiriferinida
770:
768:
762:
760:
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755:
749:
747:
741:
739:
733:
731:
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723:
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699:
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654:Dictyonellida
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598:
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502:Linguliformea
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437:on 2007-03-12
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418:0-306-44067-9
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391:on 2006-09-20
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344:0-8137-3108-9
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178:Rowell, 1965
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81:
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71:
66:
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56:
51:
46:
41:
36:
22:
19:
862:
687:
611:Trimerellida
578:Craniiformea
439:. Retrieved
435:the original
425:
412:. Springer.
409:
404:
393:. Retrieved
389:the original
379:
370:
329:
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312:
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276:
274:
267:
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253:inarticulate
250:
240:
236:
232:
230:
214:Tomteluvidae
203:
174:
160:
18:
811:Orthotetida
767:Spiriferida
754:Protorthida
746:Pentamerida
675:Kutorginida
667:Kutorginata
603:Craniopsida
522:Acrotretida
420:. Page 417.
365:59:269β293.
185:Obolellidae
144:Subphylum:
138:Brachiopoda
922:Categories
863:Obolellida
816:Productida
785:Thecideida
722:Athyridida
701:Obolellida
688:Obolellata
556:Paterinida
548:Paterinata
483:Brachiopod
441:2006-07-04
395:2006-07-04
317:References
291:impunctate
247:Obolellida
237:Obolellida
233:Obolellata
175:Obolellida
161:Obolellata
24:Obolellata
696:Naukatida
527:Lingulida
511:Lingulata
309:Naukatida
299:lingulids
269:Mummpikia
241:Naukatida
204:Naukatida
124:Kingdom:
118:Eukaryota
878:Q7075263
872:Wikidata
730:Atrypida
649:Chileida
641:Chileata
595:Craniida
587:Craniata
295:biconvex
257:Cambrian
134:Phylum:
128:Animalia
114:Domain:
738:Orthida
335:200β215
303:pedicle
285:Anatomy
278:Alisina
154:Class:
486:orders
416:
341:
905:26614
892:10788
887:IRMNG
414:ISBN
339:ISBN
239:and
231:The
35:Preκ
924::
902::
889::
874::
355:^
337:.
327:.
293:,
85:Pg
795:β
772:β
764:β
751:β
743:β
735:β
727:β
719:β
685:β
664:β
638:β
608:β
600:β
545:β
532:β
519:β
475:e
468:t
461:v
444:.
398:.
347:.
158:β
90:N
80:K
75:J
70:T
65:P
60:C
55:D
50:S
45:O
40:κ
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