Egg tooth (nonfiction): Difference between revisions
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In some egg-laying animals, the '''egg tooth''' is a small, sharp, cranial protuberance used by offspring to break or tear through the | [[File:Poicephalus_senegalus_egg_tooth.jpg|250px|thumb|A Senegal parrot chick at about 2 weeks after hatching. The egg tooth is near the tip of its beak on the upper mandible.]]In some egg-laying animals, the '''egg tooth''' is a small, sharp, cranial protuberance used by offspring to break or tear through the egg's surface during hatching. | ||
It is present in most birds and reptiles, and similar structures exist in monotremes, Eleutherodactyl frogs, and spiders. | It is present in most birds and reptiles, and similar structures exist in monotremes, ''Eleutherodactyl'' frogs, and spiders. | ||
Some lizards and snakes develop a true tooth that is shed after use; other reptiles and birds generally develop an analogous epidermal horn that is reabsorbed or falls off. | Some lizards and snakes develop a true tooth that is shed after use; other reptiles and birds generally develop an analogous epidermal horn that is reabsorbed or falls off. | ||
== In the News == | |||
<gallery mode="traditional"> | |||
</gallery> | |||
== Fiction cross-reference == | |||
* [[Egg Tooth (monster)]] | |||
== Nonfiction cross-reference == | == Nonfiction cross-reference == | ||
External links: | |||
* [ | * [https://en.wikipedia.org/wiki/Egg Egg] @ Wikipedia | ||
* [https://en.wikipedia.org/wiki/Egg_tooth Egg tooth] @ Wikipedia | * [https://en.wikipedia.org/wiki/Egg_tooth Egg tooth] @ Wikipedia | ||
[[Category:Nonfiction (nonfiction)]] | [[Category:Nonfiction (nonfiction)]] | ||
Latest revision as of 09:30, 12 August 2016
In some egg-laying animals, the egg tooth is a small, sharp, cranial protuberance used by offspring to break or tear through the egg's surface during hatching.
It is present in most birds and reptiles, and similar structures exist in monotremes, Eleutherodactyl frogs, and spiders.
Some lizards and snakes develop a true tooth that is shed after use; other reptiles and birds generally develop an analogous epidermal horn that is reabsorbed or falls off.
In the News
Fiction cross-reference
Nonfiction cross-reference
External links: