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armour zoology wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 composition 2 species with armour 3 usage 4 see also 5 references toggle the table of contents armour zoology 14 languages deutsch español فارسی français עברית hrvatski bahasa indonesia ქართული latina македонски nederlands norsk bokmål polski tiếng việt edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia redirected from armour anatomy anatomical feature fossilized armour of edmontonia specimen amnh 5665 this article needs more citations please help improve this article by adding citations to reliable sources unsourced material may be challenged and removed find sources armour zoology news newspapers books scholar jstor july 2024 learn how and when to remove this message armor or armour in animals is a rigid cuticle or exoskeleton that provides exterior protection against attack by predators 1 formed as part of the body rather than the behavioural utilization of external objects for protection usually through the thickening and hardening of superficial tissues outgrowths or skin secretions it is often found in prey species that are too slow or clumsy to outrun predators 2 or those that would stand their ground and fight thus needing to protect vital organs against claw talon or bite injuries composition edit armoured structures are usually composed of hardened mineral deposits chitin bone or keratin species with armour edit strongylocentrotus purpuratus a well armoured sea urchin armour is evident in numerous animal species from both current and prehistoric times dinosaurs such as ankylosaurus as well as other thyreophora armoured dinosaurs such as ankylosauria and stegosauria grew thick plate like armour on their bodies as well as offensive armour appendages such as the thagomizer or a tail club the armour took many forms including osteoderms spikes horns and plates other dinosaurs such as ceratopsian dinosaurs as well as some sauropods such as saltasaurus grew armour to defend themselves although armour in sauropods overall is uncommon the skull of triceratops with its large neck frill and horns both natural armour in modern times some molluscs employ the use of shells as armour and armour is evident in the chitinous exoskeleton of arthropods fish use armour in the form of scales whether cosmoid ganoid or placoid and in some cases spines such as on fish such as the stickleback the chalky plate or cuttlebone of cuttlefish also acts as armour most reptiles have scaly skin which protects them from predators in addition to water retention the crocodile s scutes and the shells of the chelonia tortoises turtles and terrapins numerous mammals employ the use of spines and body armour although not as sturdy as reptilian armour like the spines of the echidnas and of porcupines and hedgehogs the bony shell of the armadillos and the extinct glyptodon were very much like ankylosaurus armour and some modern armadillos curl up into a ball when threatened making them unexposed due to their armour similarly the hairy plate like scales of the pangolin are employed in the same way and are constructed of the same material used in the offensive armour the horn of the rhinoceros usage edit armour although all used for the sole intent to ward off attackers can be split into defensive and offensive armour examples of offensive armour are horns hooves antlers claws beaks clubs and pincers as developed in some mammals birds reptiles including dinosaurs such as the dromaeosaurid claw and the ceratopsian horn and arthropods offensive armour is often used in conjunction with defensive armour and in some cases makes an animal almost unassailable see also edit armour disambiguation carapace neck frill osteoderms scute animal weapon references edit broeckhoven chris diedericks genevieve mouton p le fras n may 2015 wang dehua ed what doesn t kill you might make you stronger functional basis for variation in body armour journal of animal ecology 84 5 1213 1221 doi 10 1111 1365 2656 12414 issn 0021 8790 caro timothy m september 2005 antipredator defenses in birds and mammals university of chicago press isbn 978 0 226 09436 6 retrieved from https en wikipedia org w index php title armour_ zoology oldid 1371865162 categories armour zoology animal anatomy dinosaur anatomy biological defense mechanisms hidden categories articles with short description short description matches wikidata articles needing additional references from july 2024 all articles needing additional references this page was last edited on 29 august 2026 at 00 05 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile view search search toggle the table of contents armour zoology 14 languages add topic