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• Argonauta_argo abstract "Argonauta argo, also known as the greater argonaut, is a species of pelagic octopus belonging to the genus Argonauta. The female of the species, like all argonauts, creates a paper-thin eggcase that coils around the octopus much like the way a nautilus lives in its shell, hence the name paper nautilus. The Chinese name for this species translates as "white sea-horse's nest". A. argo was the first argonaut species to be described and is consequently the type species of the genus. A. argo is the largest species in the genus and also produces the largest eggcase. Live animals have a characteristic blue sheen on the first arm pair and around the eyes. The eggcase is characterised by two rows of small, sharp tubercles running along a narrow keel, smooth ribs across the walls of the shell, and a thickening along the shell aperture, which forms distinct protrusions or 'horns' on either side. Argonauta cygnus Monterosato, 1889 was described based on a shell which lacked these protrusions, although it is now considered a junior synonym of A. argo. The greatest recorded size of an A. argo eggcase is 300.0 mm.A. argo is cosmopolitan, occurring in tropical and subtropical waters worldwide. A dwarf form exists in the Mediterranean Sea, which was described as Argonauta argo mediterranea Monterosato, 1914, although this taxon is now regarded as invalid.A. argo is thought to feed primarily on pelagic molluscs. The species is preyed on by numerous predators. It has been reported in the stomach contents of Alepisaurus ferox from the south-western Pacific.Males of this species reach sexual maturity at a mantle length (ML) of 8 mm. Females mature at about double the size of Argonauta bottgeri and Argonauta hians. They begin to secrete an eggcase at 6.5–7 mm ML. Eggs are usually laid when females reach 14–15 mm ML, although the size at which this takes place differs across the animal's range. A small A. argo residing in an 88 mm long eggcase was estimated to be carrying 48,800 embryos. Females grow to 100 mm ML, while males do not exceed 20 mm ML.In the open ocean, A. argo has been observed attached to jellyfish. This behaviour has been known for a long time, although little was understood about the relationship prior to the work of Heeger et al. in 1992. In "Predation on jellyfish by the cephalopod Argonauta argo", Heeger et al. describe their observations of a female A. argo found atop a host jellyfish. The argonaut was seen holding on to the aboral (exumbrellar) surface of the jellyfish using its lateral and ventral arms. The authors found that about half of the animal's aboral surface was damaged and large pieces of mesoglea were missing, presumably removed by the argonaut. Additionally, two holes, apparently bite marks, were found in the center of this area with channels leading from these holes into the gastral cavity of the jellyfish. The argonaut presumably used these channels to suck food particles from the gastral cavity. Heeger et al. suggested that "the association provided shelter or camouflage for the argonaut".Observations of captive A. argo females suggest that the expanded webs of the dorsal arms may aid the animal in feeding. Mark Norman mentions that "when food was touched against the spread webs, an arm shot out of the shell in a sweeping action, grabbing the prey". It is speculated that argonauts do not actively hunt, but employ this method to catch animals that bump into them in the open ocean.A. argo is occasionally involved in mass strandings along the South African and southern Australian coastlines. The strandings are seasonal and generally occur between April and August, towards the end of the animals' spawning season.A damaged beak of a female A. argo (ML = 40.0 mm; caught at 20°56′N 175°33′W), measuring 4.30 mm in hood length and 7.80 mm in crest length, is mentioned in A Handbook for the Identification of Cephalopod Beaks.The type specimen of A. argo was collected in the Mediterranean Sea and is deposited at the Linnean Society of London.".
• Argonauta_argo binomialAuthority 10th_edition_of_Systema_Naturae.
• Argonauta_argo binomialAuthority Carl_Linnaeus.
• Argonauta_argo class Cephalopod.
• Argonauta_argo family Argonautidae.
• Argonauta_argo genus Argonaut_(animal).
• Argonauta_argo kingdom Animal.
• Argonauta_argo order Octopus.
• Argonauta_argo phylum Mollusca.
• Argonauta_argo synonym "(Chiaie, 1827 in 1823-1831)".
• Argonauta_argo synonym "(Coen in Monterosato, 1914)".
• Argonauta_argo synonym "(Coen, 1914)".
• Argonauta_argo synonym "(Coen, 1915)".
• Argonauta_argo synonym "(Conrad, 1854)".
• Argonauta_argo synonym "(Dall, 1889)".
• Argonauta_argo synonym "(Kirk, 1886)".
• Argonauta_argo synonym "(Leach, 1817)".
• Argonauta_argo synonym "(Monterosato, 1889)".
• Argonauta_argo synonym "(Monterosato, 1914)".
• Argonauta_argo synonym "(Perry, 1811)".
• Argonauta_argo synonym "(Rafinesque, 1840)".
• Argonauta_argo synonym "(Risso, 1854)".
• Argonauta_argo synonym "(Röding, 1798)".
• Argonauta_argo synonym "(Valenciennes in Monterosato, 1914)".
• Argonauta_argo synonym "(Von Martens, 1867)".
• Argonauta_argo synonym "*?Argonauta argo f. agglutinans".
• Argonauta_argo synonym "*?Argonauta argo f. aurita".
• Argonauta_argo synonym "*?Argonauta argo f. mutica".
• Argonauta_argo synonym "*?Argonauta argo f. obtusangula".
• Argonauta_argo synonym "*?Argonauta argo var. americana".
• Argonauta_argo synonym "*?Argonauta monterosatoi".
• Argonauta_argo synonym "*?Argonauta striata".
• Argonauta_argo synonym "*?Todarus argo (nom. nud.)".
• Argonauta_argo synonym "*Argonauta argo mediterranea".
• Argonauta_argo synonym "*Argonauta bulleri".
• Argonauta_argo synonym "*Argonauta cygnus".
• Argonauta_argo synonym "*Argonauta ferussaci".
• Argonauta_argo synonym "*Argonauta grandiformis".
• Argonauta_argo synonym "*Argonauta minor".
• Argonauta_argo synonym "*Argonauta naviformis".
• Argonauta_argo synonym "*Argonauta papyracea".
• Argonauta_argo synonym "*Argonauta papyria".
• Argonauta_argo synonym "*Argonauta sebae".
• Argonauta_argo synonym "*Ocythoe antiquorum".
• Argonauta_argo synonym "*Trichocephalus acetabularis".
• Argonauta_argo thumbnail Argonauta_argo_Merculiano.jpg?width=300.
• Argonauta_argo wikiPageExternalLink species.php?species_group=zsao&id=2720&menuentry=soorten.
• Argonauta_argo wikiPageExternalLink tree?group=Argonauta.
• Argonauta_argo wikiPageExternalLink details.pl?pstrVol=CEPHALOPODA;pstrTaxa=89;pstrChecklistMode=2.
• Argonauta_argo wikiPageExternalLink 106995690.
• Argonauta_argo wikiPageExternalLink Argonautidae_Taxa?acc_id=2464.
• Argonauta_argo wikiPageID "645349".
• Argonauta_argo wikiPageRevisionID "605241708".
• Argonauta_argo align "left".
• Argonauta_argo binomial "Argonauta argo".
• Argonauta_argo binomialAuthority 10th_edition_of_Systema_Naturae.
• Argonauta_argo binomialAuthority Carl_Linnaeus.
• Argonauta_argo classis "Cephalopoda".
• Argonauta_argo familia Argonautidae.
• Argonauta_argo footer "Left: One of the earliest known depictions of A. argo, from Index Testarum Conchyliorum by Niccolò Gualtieri".
• Argonauta_argo footer "Right: A female A. argo without its shell".
• Argonauta_argo genus "Argonauta".
• Argonauta_argo hasPhotoCollection Argonauta_argo.
• Argonauta_argo image "Argonauta argo.jpg".
• Argonauta_argo image "Argonauta-argo-001.jpg".
• Argonauta_argo name "Greater argonaut".
• Argonauta_argo ordo Octopus.
• Argonauta_argo phylum "Mollusca".
• Argonauta_argo regnum "Animalia".
• Argonauta_argo species "A. argo".
• Argonauta_argo synonyms "(Chiaie, 1827 in 1823-1831) *?Todarus argo (nom. nud.)".
• Argonauta_argo synonyms "(Coen in Monterosato, 1914) *?Argonauta monterosatoi".
• Argonauta_argo synonyms "(Coen, 1914) *?Argonauta monterosatoi".
• Argonauta_argo synonyms "(Coen, 1915) *Argonauta sebae".
• Argonauta_argo synonyms "(Conrad, 1854) *?Argonauta argo f. agglutinans".
• Argonauta_argo synonyms "(Conrad, 1854) *Argonauta papyria".
• Argonauta_argo synonyms "(Dall, 1889) *Argonauta cygnus".
• Argonauta_argo synonyms "(Kirk, 1886) *?Argonauta argo var. americana".
• Argonauta_argo synonyms "(Leach, 1817) *Trichocephalus acetabularis".
• Argonauta_argo synonyms "(Monterosato, 1889) *Argonauta ferussaci".
• Argonauta_argo synonyms "(Monterosato, 1914) *?Argonauta monterosatoi".
• Argonauta_argo synonyms "(Monterosato, 1914) *Argonauta argo mediterranea".
• Argonauta_argo synonyms "(Perry, 1811) *?Argonauta striata".
• Argonauta_argo synonyms "(Perry, 1811) *Ocythoe antiquorum".
• Argonauta_argo synonyms "(Rafinesque, 1840) *Argonauta minor".
• Argonauta_argo synonyms "(Risso, 1854) *Argonauta naviformis".
• Argonauta_argo synonyms "(Röding, 1798) *Argonauta grandiformis".
• Argonauta_argo synonyms "(Valenciennes in Monterosato, 1914)".
• Argonauta_argo synonyms "(Von Martens, 1867) *?Argonauta argo f. aurita".
• Argonauta_argo synonyms "(Von Martens, 1867) *?Argonauta argo f. mutica".
• Argonauta_argo synonyms "(Von Martens, 1867) *?Argonauta argo f. obtusangula".
• Argonauta_argo synonyms "(Von Martens, 1867) *Argonauta bulleri".
• Argonauta_argo synonyms "*Argonauta papyracea".
• Argonauta_argo width "173".
• Argonauta_argo width "221".
• Argonauta_argo subject Category:Animals_described_in_1758.
• Argonauta_argo subject Category:Argonauta.
• Argonauta_argo point "20.933333333333334 -175.55".
• Argonauta_argo type Animal100015388.
• Argonauta_argo type AnimalsDescribedIn1758.

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