36:
209:
188:
426:
Current classifications (e.g. Kröger 2008 and
Teichert 1980) separate orthoceratoids, endocerids and actinocerids as co-equal taxa to the Nautiloidea, which becomes much reduced in scope. Wade (1988) instead proposed separating the Nautiloidea into phylogenetically related superorders while retaining
442:
In the classification of
Teichert (1988), the subclass Orthoceratoidea is expanded to include the orders found in the Plectronoceratoidea and Orthoceratoidea of Wade (1988), combining forms with thick-ringed ventral siphuncles with those with thin-ringed central siphuncles.
434:
In Kröger 2008, Orthoceratoidea is used as a subclass, referring to McCoy (1844), revising his (Kröger 2004) perception of the order
Orthocerida Kuhn (1940) as part of the Nautiloidea, in the sense of Sweet 1964 in the
642:
Stanley & Techert 1976; Lamellorthoceratida (Cephalopoda, Orthoceratoidea) from the Lower
Devonian of New York; the University of Kansas Paleontological Contributions, Nov.12, 1976, Paper 86.
636:
Kroger 2008, Brief Report, A new genus of middle
Tremadocian orthoceratoids and the Early Ordovician origin of orthoceratoid cephalopods; Acta Palaeontologica Polonica 53 (4): 745–749, 2008
344:
which may bear internal deposits. Orthoceratoids are also characterized by dorsomyarian muscle scars (a small number of large scars concentrated at the top of the body chamber), extensive
645:
Sweet, W..C. 1964. Nautiloidea- Orthocerida; Treatise on
Invertebrate Paleontology, Part K, Teichert and Moore (eds) Geological Society of America and University of Kansas Press.
567:
Pohle, Alexander; Kröger, Björn; Warnock, Rachel C. M.; King, Andy H.; Evans, David H.; Aubrechtová, Martina; Cichowolski, Marcela; Fang, Xiang; Klug, Christian (2022-04-14).
648:
Teichert C, 1988, Main
Features of Cephalopod Evolution, Ch 2 in The Mollusca Vol 12 Paleontology and Neontology of Cephalopods, Clarke & Trueman (eds) Academic Press.
458:
by a straightening of the adult shell, a common character of many tarphycerids. The
Dissidocerida, separated from the Orthocerida by Zhuravleva (1964), includes the
65:
651:
Wade, M 1988. Nautiloids and their descendants: cephalopod classification in 1986; New Mexico Bureau of Mines & Mineral
Resources Memoir 44, Oct 1988 :15-25.
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the basic concept of the subclass: externally shelled cephalopods with simple concave septa and retrochoanitic siphuncles from which the convexly septate
481:"Review and paleoecological analysis of the late Tremadocian – early Floian (Early Ordovician) cephalopod fauna of the Montagne Noire, France"
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436:
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Kroger 2004, Revision of Middle
Ordovician orthoceratacean nautiloids from Baltoscandia; Acta Palaeontologica Polonica 49 (1): 57–74.
87:
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The Orthoceratoidea in Kröger (2008) includes the Orthocerida, Ascocerida, Pseudorthocerda as in Wade (1988) plus the
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58:
52:
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517:"High-level classification of the nautiloid cephalopods: a proposal for the revision of the Treatise Part K"
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and two small monogeneric orders, the Polymeridae and Rangeroceratidae, both established by Evans (2005).
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As a superorder, Orthoceratiodea was one of six superorders within the Nautiloidea, the others being the
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395:(cephalopods without external shells, including squids, octopus, cuttlefish, etc.).
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454:. The Lituitida, or Lituitiae, has been shown to have evolved from within the
569:"Early cephalopod evolution clarified through Bayesian phylogenetic inference"
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340:(straight) to slightly cyrtoconic (curved) shells, and central to subcentral
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Flower 1950 in Flower and Kummel 1950, A Classification of the Nautiloidea;
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order which is ancestral to the major cephalopod groups such as the extinct
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407:(= Ellesmeroceratoidea of some) from which the others are derived, the
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431:with prochoanitic siphuncles are distinguished.
359:Currently, Orthoceratoidea comprises the orders
57:but its sources remain unclear because it lacks
8:
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186:
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602:
584:
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88:Learn how and when to remove this message
336:. Members of this subclass usually have
515:King, Andy H.; Evans, David H. (2019).
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437:Treatise on Invertebrate Paleontology
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479:Kröger, B.; Evans, D. H. (2011).
195:Orthoconic nautiloid fossil from
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34:
109:Lower Ordovician–Upper Triassic
27:Extinct subclass of cephalopods
521:Swiss Journal of Palaeontology
383:. Orthocerida is a noteworthy
1:
777:Ordovician first appearances
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586:10.1186/s12915-022-01284-5
534:10.1007/s13358-019-00186-4
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204:Scientific classification
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633:24(5):604-616, Sept 1950
43:This article includes a
631:Journal of Paleontology
329:is a major subclass of
179:survives to the present
72:more precise citations.
498:10.1002/mmng.201000013
348:, and calciosiphonate
772:Paleozoic cephalopods
729:Paleobiology Database
782:Triassic extinctions
767:Mesozoic cephalopods
787:Paraphyletic groups
405:Plectronoceratoidea
762:Mollusc subclasses
352:with a porous and
45:list of references
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661:Taxon identifiers
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175:Descendant taxon
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460:Troedssonellidae
413:Actinoceratoidea
373:Pseudorthocerida
350:connecting rings
346:cameral deposits
311:Pseudorthocerida
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106:Temporal range:
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527:(1): 65–85.
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456:Tarphycerida
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385:paraphyletic
369:Actinocerida
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289:paraphyletic
263:
84:
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64:Please help
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573:BMC Biology
491:(1): 5–34.
391:and living
381:Orthocerida
334:cephalopods
316:Orthocerida
251:Cephalopoda
70:introducing
751:Categories
466:References
429:Ammonoidea
342:siphuncles
338:orthoconic
287:(possibly
257:Subclass:
595:1741-7007
579:(1): 88.
551:133647555
543:1664-2384
452:Lituitida
389:ammonoids
377:Lituitida
361:Riocerida
331:nautiloid
301:Lituitida
285:Riocerida
227:Kingdom:
221:Eukaryota
177:Coleoidea
78:July 2023
692:BioLib:
684:Q7104418
678:Wikidata
613:35421982
399:Taxonomy
393:coleoids
354:calcitic
241:Mollusca
237:Phylum:
231:Animalia
217:Domain:
721:9103858
695:1212901
604:9008929
277:Orders
247:Class:
197:Morocco
66:improve
734:142985
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541:
419:, and
708:7NW6C
547:S2CID
269:M'Coy
51:, or
609:PMID
591:ISSN
539:ISSN
450:and
379:and
271:1844
114:Preęž’
716:EoL
703:CoL
599:PMC
581:doi
529:doi
525:138
493:doi
753::
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261:â€
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