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also rely on olfaction through rhinophores, chemosensory structures that are similar to other olfactory organs expressed by other members in the cephalopod family such as
Octopus. Rhinophores are situated inside the Nautilus and are exposed to the external environment through pores located below the
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possess digital tentacles which are able to detect chemosensation, though its preocular and postocular tentacles are more sensitive and also are believed to function for tactile purposes. When perceiving odor stimulation through its rhinophore, its digital tentacles are often spread out laterally in
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are scavengers that utilize two chemosensory rhinophores, rod-shaped structures located below the eye, to locate dead meat and consuming low-nutrients from the ocean floor. They dwell in darker waters in depths up to 300 meters, though moving towards shallower waters to scavenge at night. Though
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as belonging to the
Australian/Papua-New Guinean clade, providing insight that both species may have arisen from sympatric speciation. Few studies have sought to identify the DNA sequence differences between the species, moreover the genetic distinction of
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a "cone of search" to identify the source of the stimulus. Nautilus expresses this distinct pattern of behavior when attempting to locate the source of an odor, swaying its tentacles in a cone shape to detect and move towards the substrate.
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genus are believed to have evolved to their current form between seven and ten million years ago, though some estimates place their divergence from their
Mesozoic ancestors as early as 40 million years ago. Though
516:
Basil, Jennifer, et al. "The function of the rhinophore and the tentacles of
Nautilus pompilius L.(Cephalopoda, Nautiloidea) in orientation to odor." Marine and Freshwater Behaviour and Physiology 38.3 (2005):
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Ward, Peter, Frederick Dooley, and
Gregory Jeff Barord. "Nautilus: biology, systematics, and paleobiology as viewed from 2015." Swiss Journal of Palaeontology 135.1 (2016): 169-185.
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Dunstan, Andrew J., Peter D. Ward, and N. Justin
Marshall. "Nautilus pompilius life history and demographics at the Osprey Reef Seamount, Coral Sea, Australia." PLOS ONE 6.2 (2011)
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also differs slightly in hood ornamentation. The shell is usually up to around 180 mm in diameter, although the largest specimen ever recorded measured 201 mm.
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subspecies identification through taxonomic features is difficult between populations as many features that were thought to be unique may overlap across different
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hybrid species exhibit less than one percent deviation from the DNA sequences of both parent species. Phylogenetic reconstructions identify both
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are pelagic molluscs belonging to the
Nautilidae cephalopod family predominantly found across coral reefs along the Indo-Pacific region.
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and its subspecies from their identical DNA sequence sections and synapomorphies, there is significant evidence to suggest that
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reveals that they cannot be identified as independent lineages due to their shared DNA positions and synapomorphies. Moreover,
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538:
Vandepas, Lauren E., et al. "A revisited phylogeography of
Nautilus pompilius." Ecology and evolution 6.14 (2016): 4924-4935.
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express sexual dimorphism, with mature males predominantly being larger and are significantly more abundant than females.
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and shoulder regions of the shell. The sheaths of this species have scalloped edges compared with the smooth sheaths of
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are regionally bound and known to inhabit areas around Palau, New
Caledonia, and Papua-New Guinea respectively.
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members. Phylogenetic analysis conducted utilizing DNA and morphological data between members suggests that
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Wray, Charles G., et al. "Genetic divergence and geographic diversification in
Nautilus."
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represents the type species as it is the most common and widely distributed member of the
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and may in fact represent a subspecies. It is separated by the absence of a thickened
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is classified as an individual species compared to its much more abundant relative
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predominantly rely on chemoreception in order to locate food in their habitat.
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is specifically known to inhabit the Great Barrier Reef, whereas other members
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489:(4th ed.). Snail's Pace Productions and ConchBooks. p. 93.
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share many morphological similarities with its close relative
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family, and is used as a point of comparison to other
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390:Due to the striking similarities between
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406:populations. Other subspecies such as
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295:such as "zigzag" shell color pattern
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486:Registry of World Record Size Shells
434:represents a paraphyletic group of
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583:"CephBase: Nautilus stenomphalus"
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438:members, though not including
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834:Cephalopods described in 1848
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569:Cephalopods: A World Guide
283:possessing primitive eyes,
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78:Scientific classification
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332:Taxonomy and evolution
762:Paleobiology Database
637:Nautilus_stenomphalus
608:Nautilus stenomphalus
556:21.2 (1995): 220-228.
483:Pisor, D. L. (2005).
343:Nautilus stenomphalus
265:Nautilus stenomphalus
215:Nautilus stenomphalus
197:Nautilus stenomphalus
36:Nautilus stenomphalus
460:"Appendices | CITES"
382:remains unresolved.
220:white-patch nautilus
218:, also known as the
179:N. stenomphalus
18:White-patch Nautilus
234:is very similar to
53:Conservation status
396:Nautilus pompilius
347:Nautilus pompilius
228:Great Barrier Reef
222:, is a species of
27:Species of mollusc
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749:Open Tree of Life
600:Taxon identifiers
304:Sexual dimorphism
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16:(Redirected from
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336:Members of the
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775:SeaLifeBase
684:iNaturalist
275:Description
135:Nautiloidea
125:Cephalopoda
64:Appendix II
829:Nautiluses
823:Categories
565:Norman, M.
469:2022-01-14
446:References
299:Morphology
155:Nautilidae
131:Subclass:
464:cites.org
386:Phylogeny
363:pompilius
246:umbilical
173:Species:
145:Nautilida
101:Kingdom:
95:Eukaryota
788:Species+
702:11212339
623:Q3202996
617:Wikidata
517:209-221.
436:Nautilus
428:Nautilus
424:Nautilus
404:Nautilus
400:Nautilus
392:Nautilus
338:Nautilus
224:nautilus
166:Nautilus
151:Family:
115:Mollusca
111:Phylum:
105:Animalia
91:Domain:
676:2289206
204:Sowerby
161:Genus:
141:Order:
121:Class:
66: (
806:342238
767:128627
754:616354
741:342238
715:556511
689:123468
650:902254
567:2000.
414:, and
328:eyes.
242:callus
206:, 1848
801:WoRMS
793:93871
780:57843
728:34574
697:IRMNG
663:45VLM
68:CITES
62:CITES
736:OBIS
723:NCBI
710:ITIS
671:GBIF
645:BOLD
378:and
369:and
361:and
353:and
658:CoL
632:AFD
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
