{"id":4996,"date":"2024-01-22T11:04:44","date_gmt":"2024-01-22T04:04:44","guid":{"rendered":"https:\/\/wam.vn\/en\/?p=4996"},"modified":"2024-01-22T11:04:44","modified_gmt":"2024-01-22T04:04:44","slug":"understanding-carcinization-why-diverse-species-evolve-into-crabs","status":"publish","type":"post","link":"https:\/\/wam.vn\/en\/understanding-carcinization-why-diverse-species-evolve-into-crabs\/","title":{"rendered":"Understanding Carcinization: Why Diverse Species Evolve into Crabs"},"content":{"rendered":"<p><em><strong>TLDR<\/strong>: Carcinization: The evolutionary trend of diverse crustaceans repeatedly evolving into crab-like forms due to mobility, habitat versatility, and predator evasion benefits.<\/em><\/p>\n<p>This article is a summary of a You Tube video &#8220;Why Do Things Keep Evolving Into Crabs?&#8221; by PBS Eons<br \/>\n<iframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/wvfR3XLXPvw?si=AONttPzHUoAf9OUl\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<h3>Key Takeaways:<\/h3>\n<ol>\n<li><strong>Ancient Crab Ancestors<\/strong>: The narrative begins with the description of an ancient ancestor of modern king crabs, Paralomis debodeorum, dating back to 10 million years ago.<\/li>\n<li><strong>Crab Evolution<\/strong>: Multiple species, not originally crabs, have evolved independently into crab-like forms, a phenomenon known as &#8220;carcinization.&#8221;<\/li>\n<li><strong>Anomura and Brachyura<\/strong>: The crustacean infraorder Anomura includes species like king crabs, which are not true crabs, whereas Brachyura includes true crabs.<\/li>\n<li><strong>Evolutionary Flexibility<\/strong>: The crab form is noted for its evolutionary success, attributed to its flexibility and adaptability in various environments.<\/li>\n<li><strong>Decapods and Diversification<\/strong>: The decapods, a group including shrimps, lobsters, and crabs, have diversified significantly over time, with a shift towards the crab shape.<\/li>\n<li><strong>Mesozoic Era and Crab Explosion<\/strong>: There was a significant increase in crab-shaped species during the Mesozoic Era, especially in the Cretaceous Period.<\/li>\n<li><strong>Advantages of Crab Shape<\/strong>: The crab shape offers advantages in mobility, habitat exploitation, and predator evasion.<\/li>\n<li><strong>Carcinization and Decarcinization<\/strong>: The process of evolving into a crab-like shape is called carcinization, while the reverse is decarcinization, which has also occurred.<\/li>\n<li><strong>Convergent Evolution<\/strong>: Carcinization is a prime example of convergent evolution, where unrelated species evolve similar traits.<\/li>\n<li><strong>Versatility of Crabs<\/strong>: Crabs, both true and false, are found in diverse environments, from deep sea to land, showcasing their adaptability and survival skills.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>Carcinization: The evolutionary trend of diverse crustaceans repeatedly evolving into crab-like forms due to mobility, habitat versatility, and predator evasion benefits.<\/p>\n","protected":false},"author":3,"featured_media":4997,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[44],"tags":[],"class_list":["post-4996","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science","category-44","description-off"],"_links":{"self":[{"href":"https:\/\/wam.vn\/en\/wp-json\/wp\/v2\/posts\/4996","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wam.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wam.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wam.vn\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/wam.vn\/en\/wp-json\/wp\/v2\/comments?post=4996"}],"version-history":[{"count":1,"href":"https:\/\/wam.vn\/en\/wp-json\/wp\/v2\/posts\/4996\/revisions"}],"predecessor-version":[{"id":4998,"href":"https:\/\/wam.vn\/en\/wp-json\/wp\/v2\/posts\/4996\/revisions\/4998"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wam.vn\/en\/wp-json\/wp\/v2\/media\/4997"}],"wp:attachment":[{"href":"https:\/\/wam.vn\/en\/wp-json\/wp\/v2\/media?parent=4996"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wam.vn\/en\/wp-json\/wp\/v2\/categories?post=4996"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wam.vn\/en\/wp-json\/wp\/v2\/tags?post=4996"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}