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{{Speciesbox
{{Taxobox
| fossil_range = [[Late Eocene]] – [[Oligocene]]
| fossil_range = [[Late Eocene]] – [[Oligocene]]
| image =
| image =
| genus = Nautilus
| image_width =
| species = praepompilius
| regnum = [[Animal]]ia
| authority = Shimansky, 1957
| phylum = [[Mollusc]]a
| classis = [[Cephalopod]]a
| ordo = [[Nautilida]]
| familia = [[Nautilidae]]
| genus = ''[[Nautilus (genus)|Nautilus]]''
| species = '''''N. praepompilius'''''
| binomial = ''Nautilus praepompilius''
| binomial_authority = Shimansky, 1957
}}
}}

'''''Nautilus praepompilius''''' is an [[extinction|extinct]] species of [[nautilus]]. It lived during the [[Late Eocene]] through [[Oligocene]] [[Epoch (reference date)|epoch]]s. [[Fossil]] specimens have been uncovered from the [[Chegan Formation]] of [[Kazakhstan]]. ''N. praepompilius'' has been grouped into a single [[taxon]] together with extant species based on their shared shell characters. It is morphologically closest to ''[[Chambered Nautilus|N. pompilius]]'', hence the name. The nepionic constriction shows that the hatching size was approximately 23 mm, close to that for ''N. pompilius'' (around 26 mm).<ref>Ward, P.D. & W.B. Saunders 1997. [https://www.jstor.org/stable/1306604 ''Allonautilus'': a new genus of living nautiloid cephalopod and its bearing on phylogeny of the Nautilida]. ''Journal of Paleontology'' '''71'''(6): 1054–1064.</ref> ''N. praepompilius'', along with [[Nautilus cookanum|aff. ''N. cookanum'']] fossils from the late Eocene [[Hoko River Formation]] in [[Washington (U.S. state)|Washington state]] are the oldest occurrences of the genus.<ref name="Ryoji2008">{{cite journal |last1=Ryoji |first1=W. |year=2008 |title= First discovery of fossil ''Nautilus pompilius'' (Nautilidae, Cephalopoda) from Pangasinan, northwestern Philippines |journal= Paleontological Research |volume=12 |issue=1 |pages=89–95 |doi= 10.2517/1342-8144(2008)12[89:FDOFNP]2.0.CO;2|display-authors=etal}}</ref>
'''''Nautilus praepompilius''''' is an [[extinction|extinct]] species of [[nautilus]]. It lived during the [[Late Eocene]] through [[Oligocene]] [[Epoch (reference date)|epoch]]s. [[Fossil]] specimens have been uncovered from the [[Chegan Formation]] of [[Kazakhstan]]. ''N. praepompilius'' has been grouped into a single [[taxon]] together with extant species based on their shared shell characters. It is morphologically closest to ''[[Chambered Nautilus|N. pompilius]]'', hence the name. The nepionic constriction shows that the hatching size was approximately 23 mm, close to that for ''N. pompilius'' (around 26 mm).<ref>Ward, P.D. & W.B. Saunders 1997. [https://www.jstor.org/stable/1306604 ''Allonautilus'': a new genus of living nautiloid cephalopod and its bearing on phylogeny of the Nautilida]. ''Journal of Paleontology'' '''71'''(6): 1054–1064.</ref> ''N. praepompilius'', along with [[Nautilus cookanum|aff. ''N. cookanum'']] fossils from the late Eocene [[Hoko River Formation]] in [[Washington (U.S. state)|Washington state]] are the oldest occurrences of the genus.<ref name="Ryoji2008">{{cite journal |last1=Ryoji |first1=W. |year=2008 |title= First discovery of fossil ''Nautilus pompilius'' (Nautilidae, Cephalopoda) from Pangasinan, northwestern Philippines |journal= Paleontological Research |volume=12 |issue=1 |pages=89–95 |doi= 10.2517/1342-8144(2008)12[89:FDOFNP]2.0.CO;2|display-authors=etal}}</ref>



Revision as of 20:32, 21 February 2018

Nautilus praepompilius
Temporal range: Late EoceneOligocene
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Nautiloidea
Order: Nautilida
Family: Nautilidae
Genus: Nautilus
Species:
N. praepompilius
Binomial name
Nautilus praepompilius
Shimansky, 1957

Nautilus praepompilius is an extinct species of nautilus. It lived during the Late Eocene through Oligocene epochs. Fossil specimens have been uncovered from the Chegan Formation of Kazakhstan. N. praepompilius has been grouped into a single taxon together with extant species based on their shared shell characters. It is morphologically closest to N. pompilius, hence the name. The nepionic constriction shows that the hatching size was approximately 23 mm, close to that for N. pompilius (around 26 mm).[1] N. praepompilius, along with aff. N. cookanum fossils from the late Eocene Hoko River Formation in Washington state are the oldest occurrences of the genus.[2]

References

  1. ^ Ward, P.D. & W.B. Saunders 1997. Allonautilus: a new genus of living nautiloid cephalopod and its bearing on phylogeny of the Nautilida. Journal of Paleontology 71(6): 1054–1064.
  2. ^ Ryoji, W.; et al. (2008). "First discovery of fossil Nautilus pompilius (Nautilidae, Cephalopoda) from Pangasinan, northwestern Philippines". Paleontological Research. 12 (1): 89–95. doi:10.2517/1342-8144(2008)12[89:FDOFNP]2.0.CO;2.