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- Xibalbanus_tulumensis abstract "Xibalbanus tulumensis (previously Speleonectes tulumensis – Speleonectes = 'cave swimmer'; tulumensis = 'occurring at Tulum' – Xibalbanus = 'from Xibalba') is a venomous, hermaphroditic crustacean found in anchialine caves on the Yucatán Peninsula in the Caribbean Sea. This blind remipede liquefies the body contents of other crustaceans with a venom similar to that of rattlesnakes, and which includes digestive enzymes and a paralysing toxin.In her 1987 description, Smithsonian biologist Jill Yager wrote 'Body elongate, slender, without eyes or pigment. Cephalic shield small, tapering slightly at anterior end. Trunk segment numbers increasing with age, maximum number examined was 36 segments'. The numerous legs are used as oars for swimming. The species is 25–30 millimetres (1.0–1.2 in) long, and found in cenotes close to the sea, with salty seawater lying beneath the fresh water, and grading smoothly from one type to the other (halocline).Stygobites are organisms found in subterranean groundwater habitats or anchialine caves, and characterised morphologically by loss or extreme reduction of eyes and pigment, frequently with attenuated bodies and/or appendages. The evolution of this body shape is known as troglomorphy. X. tulumensis is one of 24 species in the class Remipedia, all of which are stygobitic, and distributed throughout the Caribbean, the Canary Islands and Western Australia. They are free-swimming crustaceans, typically living in low-oxygen, brackish waters of near-marine caves, and their distribution is linked to the ancient Tethys Sea. The first member of the class Remipedia to be discovered and described, by Jill Yager in the Journal of Crustacean Biology in 1981, was Speleonectes lucayensis from Lucayan Cavern on the Grand Bahama Island.The feeding technique of X. tulumensis is unique among crustaceans, and its venom is a useful adaptation that to some extent compensates for being sightless in a nutrient-poor or oligotrophic environment. Venom is common in all the arthropod subphyla, but was believed to be completely absent from the approximately 70,000 known species of crustacean until the discovery of X. tulumensis. In 2007, researchers noticed that the species' front claws resembled hypodermic needles, leading to speculation that their purpose might be to inject toxins into their prey. Venom-filled reservoirs have since been found attached to the needles, packed in muscles that can force out the venom. Glands in the centre of the body produce the venom and connect to the reservoirs. Dr. Yager suspects that all remipede species have some type of poison apparatus since all have fangs on the first maxilla.".
- Xibalbanus_tulumensis class Remipedia.
- Xibalbanus_tulumensis family Remipedia.
- Xibalbanus_tulumensis genus Xibalbanus.
- Xibalbanus_tulumensis kingdom Animal.
- Xibalbanus_tulumensis order Remipedia.
- Xibalbanus_tulumensis phylum Arthropod.
- Xibalbanus_tulumensis phylum Crustacean.
- Xibalbanus_tulumensis synonym "Speleonectes tulumensis (Yager, 1987)".
- Xibalbanus_tulumensis thumbnail Speleonectes_tanumekes_unlabeled.png?width=300.
- Xibalbanus_tulumensis wikiPageExternalLink art04.
- Xibalbanus_tulumensis wikiPageExternalLink .Umg9CHDvspo.
- Xibalbanus_tulumensis wikiPageExternalLink Speleonectes-tulumensis600.jpg.
- Xibalbanus_tulumensis wikiPageID "40864748".
- Xibalbanus_tulumensis wikiPageLength "6256".
- Xibalbanus_tulumensis wikiPageOutDegree "37".
- Xibalbanus_tulumensis wikiPageRevisionID "695923805".
- Xibalbanus_tulumensis wikiPageWikiLink Anchialine_pool.
- Xibalbanus_tulumensis wikiPageWikiLink Animal.
- Xibalbanus_tulumensis wikiPageWikiLink Arthropod.
- Xibalbanus_tulumensis wikiPageWikiLink Canary_Islands.
- Xibalbanus_tulumensis wikiPageWikiLink Caribbean_Sea.
- Xibalbanus_tulumensis wikiPageWikiLink Category:Animals_described_in_1987.
- Xibalbanus_tulumensis wikiPageWikiLink Category:Remipedia.
- Xibalbanus_tulumensis wikiPageWikiLink Category:Venomous_arthropods.
- Xibalbanus_tulumensis wikiPageWikiLink Cenote.
- Xibalbanus_tulumensis wikiPageWikiLink Contributions_to_Zoology.
- Xibalbanus_tulumensis wikiPageWikiLink Crustacean.
- Xibalbanus_tulumensis wikiPageWikiLink Grand_Bahama.
- Xibalbanus_tulumensis wikiPageWikiLink Halocline.
- Xibalbanus_tulumensis wikiPageWikiLink Hermaphrodite.
- Xibalbanus_tulumensis wikiPageWikiLink Hypodermic_needle.
- Xibalbanus_tulumensis wikiPageWikiLink Journal_of_Crustacean_Biology.
- Xibalbanus_tulumensis wikiPageWikiLink National_Museum_of_Natural_History.
- Xibalbanus_tulumensis wikiPageWikiLink Oligotroph.
- Xibalbanus_tulumensis wikiPageWikiLink Rattlesnake.
- Xibalbanus_tulumensis wikiPageWikiLink Remipedia.
- Xibalbanus_tulumensis wikiPageWikiLink Speleonectes_lucayensis.
- Xibalbanus_tulumensis wikiPageWikiLink Stygofauna.
- Xibalbanus_tulumensis wikiPageWikiLink Tethys_Ocean.
- Xibalbanus_tulumensis wikiPageWikiLink Troglomorphism.
- Xibalbanus_tulumensis wikiPageWikiLink Tulum,_Quintana_Roo.
- Xibalbanus_tulumensis wikiPageWikiLink Venom.
- Xibalbanus_tulumensis wikiPageWikiLink Western_Australia.
- Xibalbanus_tulumensis wikiPageWikiLink Xibalba.
- Xibalbanus_tulumensis wikiPageWikiLink Xibalbanus.
- Xibalbanus_tulumensis wikiPageWikiLink Yucatán_Peninsula.
- Xibalbanus_tulumensis wikiPageWikiLink File:Speleonectes_tanumekes_unlabeled.png.
- Xibalbanus_tulumensis wikiPageWikiLinkText "Xibalbanus tulumensis".
- Xibalbanus_tulumensis binomial "Xibalbanus tulumensis".
- Xibalbanus_tulumensis classis Remipedia.
- Xibalbanus_tulumensis familia Remipedia.
- Xibalbanus_tulumensis genus "Xibalbanus".
- Xibalbanus_tulumensis name "Xibalbanus tulumensis".
- Xibalbanus_tulumensis ordo Remipedia.
- Xibalbanus_tulumensis phylum "Arthropoda".
- Xibalbanus_tulumensis regnum "Animalia".
- Xibalbanus_tulumensis species "X. tulumensis".
- Xibalbanus_tulumensis subphylum Crustacean.
- Xibalbanus_tulumensis synonyms "Speleonectes tulumensis (Yager, 1987)".
- Xibalbanus_tulumensis wikiPageUsesTemplate Template:Cite_journal.
- Xibalbanus_tulumensis wikiPageUsesTemplate Template:Convert.
- Xibalbanus_tulumensis wikiPageUsesTemplate Template:Italic_title.
- Xibalbanus_tulumensis wikiPageUsesTemplate Template:Reflist.
- Xibalbanus_tulumensis wikiPageUsesTemplate Template:Taxobox.
- Xibalbanus_tulumensis subject Category:Animals_described_in_1987.
- Xibalbanus_tulumensis subject Category:Remipedia.
- Xibalbanus_tulumensis subject Category:Venomous_arthropods.
- Xibalbanus_tulumensis hypernym Crustacean.
- Xibalbanus_tulumensis type Animal.
- Xibalbanus_tulumensis type Crustacean.
- Xibalbanus_tulumensis type Eukaryote.
- Xibalbanus_tulumensis type Species.
- Xibalbanus_tulumensis type Thing.
- Xibalbanus_tulumensis type Q19088.
- Xibalbanus_tulumensis type Q729.
- Xibalbanus_tulumensis comment "Xibalbanus tulumensis (previously Speleonectes tulumensis – Speleonectes = 'cave swimmer'; tulumensis = 'occurring at Tulum' – Xibalbanus = 'from Xibalba') is a venomous, hermaphroditic crustacean found in anchialine caves on the Yucatán Peninsula in the Caribbean Sea.".
- Xibalbanus_tulumensis label "Xibalbanus tulumensis".
- Xibalbanus_tulumensis sameAs Q8214590.
- Xibalbanus_tulumensis sameAs Speleonectes_tulumensis.
- Xibalbanus_tulumensis sameAs Speleonectes_tulumensis.
- Xibalbanus_tulumensis sameAs Speleonectes_tulumensis.
- Xibalbanus_tulumensis sameAs m.0yp1y4g.
- Xibalbanus_tulumensis sameAs Speleonectes_tulumensis.
- Xibalbanus_tulumensis sameAs Speleonectes_tulumensis.
- Xibalbanus_tulumensis sameAs Q8214590.
- Xibalbanus_tulumensis wasDerivedFrom Xibalbanus_tulumensis?oldid=695923805.
- Xibalbanus_tulumensis depiction Speleonectes_tanumekes_unlabeled.png.
- Xibalbanus_tulumensis isPrimaryTopicOf Xibalbanus_tulumensis.
- Xibalbanus_tulumensis name "Xibalbanus tulumensis".