Nautilus stenomphalus

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Nautilus stenomphalus
Systematik
DomänEukaryoter
Eukaryota
RikeDjur
Animalia
StamBlötdjur
Mollusca
KlassBläckfiskar
Cephalopoda
OrdningNautilida
FamiljPärlbåtar
Nautilidae
SläkteNautilus
ArtNautilus stenomphalus
Vetenskapligt namn
§ Nautilus stenomphalus
AuktorSowerby, 1848
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Nautilus stenomphalus[1][2][3] är en bläckfiskart som beskrevs av Sowerby 1848. Nautilus stenomphalus ingår i släktet Nautilus och familjen pärlbåtar.[4][5] Inga underarter finns listade i Catalogue of Life.[4]

Källor

  1. ^ Sweeney, M. J. and C. F. E. Roper / N. A. Voss, M. Vecchione, R. B. Toll and M. J. Sweeney, eds. (1998) Classification, type localities and type repositories of recent Cephalopoda, Systematics and Biogeography of Cephalopods. Smithsonian Contributions to Zoology, 586 (I-II)
  2. ^ Saunders, W. B. / W. B. Saunders and N. H. Landman, eds. (1987) The species of Nautilus, Nautilus: The biology and paleobiology of a living fossil
  3. ^ Sowerby, G. B. (1848) Monograph of the genus Nautilus, Thesaurus Conchyliorum, 2
  4. ^ [a b] Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D. (red.) (7 februari 2011). ”Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist.”. Species 2000: Reading, UK. http://www.catalogueoflife.org/annual-checklist/2011/search/all/key/nautilus+stenomphalus/match/1. Läst 24 september 2012. 
  5. ^ ITIS: The Integrated Taxonomic Information System. Orrell T. (custodian), 2011-04-26


Katalogdata
 • AFD: Nautilus_stenomphalus​​​​​​ • GBIF: 2289206​​​ • Inaturalist: 123468​ • ITIS: 556511​​ • NCBI: 34574​​ • Fossilworks: 128627​ • WoRMS: 342238​​​​​​​​​​​​​​​​​​​​​ • Species+: 93871​​​​​​​

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Nautilus stenomphalus (white-patch nautilus) (Mindanao, Philippines) 2 (24078294661).jpg
Författare/Upphovsman: James St. John, Licens: CC BY 2.0

Nautilus stenomphalus Sowerby, 1849 - white-patch nautilus shell (BMSM 67290, Bailey-Matthews Shell Museum, Sanibel Island, Florida, USA)

This shell is from one of only 6 living species of an entire group of molluscs - the nautiloids. Nautiloids are basically a squid in a shell. Most modern squids do not have an external hard shell, but the white-patch nautilus does. The shell is composed of aragonite (CaCO3 - calcium carbonate). In the fossil record, most nautiloids had a long, straight, slightly tapering shell. Some fossil forms had slightly curved or open coiled or tightly coiled shells. The modern white-patch nautilus shell is tightly coiled. All nautiloid shells are/were hollow, but they were separated into many chambers by curvilinear walls. A tube of tissue called the siphuncle runs through the shell's chambers - it passively pumps gas into or out of the chambers. Increased gas content within the shell's chambers results in a low-buoyancy body, and the organism rises in the water column. As water is added to the chambers by the siphuncle, the organism's body becomes heavier and it sinks. These changes do not occur quickly.

Classification: Animalia, Mollusca, Cephalopoda, Nautiloidea, Nautilidae

Locality: unrecorded locality around Mindanao Island, southern Philippines

More info. at: en.wikipedia.org/wiki/Nautilus_stenomphalus and en.wikipedia.org/wiki/Chambered_nautilus and

en.wikipedia.org/wiki/Siphuncle