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Quetzal1964 (talk | contribs) Speciesbox |
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{{Speciesbox
| fossil_range = {{fossil range|Miocene|Recent|ref=<ref>{{cite journal|title=''Spirula'' (Sepioidea: Cephalopoda) from the Lower Miocene of Kaipara Harbour, New Zealand (note)|author=Hayward, B.W. |url=http://www.kaiparaharbour.net.nz/publications/documents/Hayward1976Spirula%20from%20lower%20miocene%20of%20kaipara%20hrb%20NZ.pdf|journal= New Zealand Journal of Geology and Geophysics|year= 1977|doi=10.1080/00288306.1976.10423557 }}</ref>}}
| status_system = IUCN3.1▼
|status_ref =<ref name=IUCN>Barratt, I. & Allcock, L. (2012). [http://www.iucnredlist.org/details/162587/0 ''Spirula spirula'']. The IUCN Red List of Threatened Species. Version 2014.2.</ref>▼
| image = Spirula spirula1.jpg
| image_caption = Dorsal view of female
| image2 = Spirula spirula2.jpg
| image2_caption = Ventral view of female<br>([[chromatophore]]s of mantle missing)
|
▲| status_system = IUCN3.1
▲|status_ref =<ref name=IUCN>Barratt, I. & Allcock, L. (2012). [http://www.iucnredlist.org/details/162587/0 ''Spirula spirula'']. The IUCN Red List of Threatened Species. Version 2014.2.</ref>
| grandparent_authority = [[Richard Owen|Owen]], 1836
| genus = Spirula
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*''Nautilus spirula'' <small>[[Carl Linnaeus|Linnaeus]], [[10th edition of Systema Naturae|1758]]</small>
}}
'''''Spirula spirula''''' is a [[species]] of deep-water [[squid]]-like [[cephalopod]] [[mollusc|mollusk]]. It is the only [[extant taxon|extant]] member of the [[genus]] '''''Spirula''''', the [[Family (biology)|family]] '''Spirulidae''', and the [[order (biology)|order]] [[Spirulida]]. Because of the shape of its internal shell, it is commonly known as the '''ram's horn squid'''<ref>[[Mark Norman (marine biologist)|Norman, M.]] 2000. ''Cephalopods: A World Guide''. Hackenheim, ConchBooks.</ref> or the '''little post horn squid'''. Because the live animal has a light-emitting organ, it is also sometimes known as the '''tail-light squid'''.
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