{"id":18086,"date":"2023-12-13T01:53:17","date_gmt":"2023-12-12T20:23:17","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=18086"},"modified":"2025-04-05T08:35:40","modified_gmt":"2025-04-05T03:05:40","slug":"demaorchestia-alanensis","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/demaorchestia-alanensis\/","title":{"rendered":"What is Demaorchestia alanensis?"},"content":{"rendered":"<h2>About Demaorchestia alanensis<\/h2>\n<ul>\n<li>It is a new species of\u00a0marine amphipod-a\u00a0shrimp-like crustacea of the genus Demaorchestia.<\/li>\n<li>The present discovery has added one more species to the genus Demaorchestia, raising the global species number in the group to six.<\/li>\n<li>Features:\n<ul>\n<li>It is\u00a0white in colour and less than 15 millimetres in length.<\/li>\n<li>It has\u00a013 pairs of legs. While\u00a0three pairs are used for swimming\u00a0in the water,\u00a0eight pairs are used\u00a0for walking on land. The other\u00a0two pairs are used\u00a0for capturing prey and feeding.<\/li>\n<li>The species can be distinguished from the other members of the genus by two\u00a0to three strong, hair-like structures,\u00a0or setae,\u00a0on the anterior margin of the propodus of the gnathopod.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>What are Amphipods?<\/h2>\n<ul>\n<li>Amphipod are any member of the\u00a0invertebrate order Amphipoda (class Crustacea) inhabiting all parts of the sea, lakes, rivers, sand beaches, caves, and moist (warm) habitats on many tropical islands.<\/li>\n<li>They are often\u00a0mistaken for tiny shrimp, which they resemble.<\/li>\n<li>They can be\u00a0found in all marine habitats (even the deepest ocean trenches, e.g., Hirondellea dubia), and have\u00a0also colonised freshwater and terrestrial habitats.<\/li>\n<li>The\u00a0generic diversity of amphipods is apparently\u00a0higher in cool waters than in warm ones.<\/li>\n<li>Freshwater and marine\u00a0beach species are commonly\u00a0known as scuds; those\u00a0that occupy sand beaches are called sand hoppers, or sand fleas (see sand flea).\u00a0<\/li>\n<li>They range in size from a millimetre in length to the supergiant amphipod Alicella gigantea at 340 mm.\u00a0<\/li>\n<li>They are\u00a0important food for many fish, invertebrates, penguins, shore birds, small cetaceans, and pinnipeds.<\/li>\n<li>Most amphipods are\u00a0active swimmers, propelled by three pairs of abdominal appendages.\u00a0<\/li>\n<\/ul>\n<hr \/>\n<h3>Q1) What are crustaceans?<\/h3>\n<p>These are members of the subphylum Crustacea (phylum Arthropoda). They are found in a wide range of habitats &#8211; most are free-living freshwater or marine animals, but some are terrestrial. They are invertebrates with a hard exoskeleton (carapace), a segmented body that is bilaterally symmetrical, more than four pairs of jointed appendages (&#8220;legs&#8221;) and an open circulatory system. Examples: Crabs, lobsters, shrimps, and wood lice etc.<\/p>\n<p><strong>Source:<\/strong> <a href=\"https:\/\/www.downtoearth.org.in\/news\/wildlife-biodiversity\/new-marine-amphipod-species-found-in-chillika-lake-odisha-93338\" target=\"_blank\" rel=\"nofollow noopener\"><u>New marine amphipod species found in Chillika Lake, Odisha<\/u><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Demaorchestia alanensis  is a new species of marine amphipod-a shrimp-like crustacea of the genus Demaorchestia.<\/p>\n","protected":false},"author":5,"featured_media":18087,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-18086","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/18086","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=18086"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/18086\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/18087"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=18086"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=18086"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=18086"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}