{"id":49455,"date":"2025-08-07T03:42:09","date_gmt":"2025-08-07T03:42:09","guid":{"rendered":"https:\/\/www.newsbeep.com\/au\/49455\/"},"modified":"2025-08-07T03:42:09","modified_gmt":"2025-08-07T03:42:09","slug":"record-setting-tarantulas-boast-longest-sex-organs-to-avoid-getting-eaten-by-females","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/au\/49455\/","title":{"rendered":"Record-Setting Tarantulas Boast Longest Sex Organs to Avoid Getting Eaten by Females"},"content":{"rendered":"<p>Researchers have just identified four new species of tarantulas whose genitals are so long they had to make a new biological classification for them.<\/p>\n<p>Meet the Satyrex ferox, S. arabicus, S. somalicus, and S. speciosus. They hail from the Arabian Peninsula and the Horn of Africa and are so different from their closest relatives\u2014on both the morphological and molecular level\u2014that the team created a new genus for them, Satyrex.<\/p>\n<p>\u201cThe genus name is a combination of Satyr, a part-man, part-beast entity from Greek mythology known for his exceptionally large genitals, and the Latin r\u0113x, meaning king,\u201d the researchers wrote in a <a href=\"https:\/\/zookeys.pensoft.net\/article\/162886\/\" rel=\"nofollow noopener\" target=\"_blank\">study<\/a> published last month in the journal ZooKeys.<\/p>\n<p>Like Satyrs, the males of the four new species, as well as a fifth Satyrex species, have the longest known palps of all tarantulas. Palps are limbs that male spiders use to, among other things, transfer sperm while mating. Technically, palps are not penises but rather secondary sex organs. Satyrex ferox, whose legspan is around 5.5 inches (14 centimeters), has male palps up to 2 inches long (5 cm). For comparison, that\u2019s almost as long as its longest legs.<\/p>\n<p>Since male spiders, unlike male humans, probably don\u2019t go around comparing their nether regions to each other, what\u2019s the point of adorning such lengthy junk?<\/p>\n<p>For S. ferox specifically, \u201cwe have tentatively suggested that the long palps might allow the male to keep a safer distance during mating and help him avoid being attacked and devoured by the highly aggressive female,\u201d Alireza Zamani, lead author of the study and an arachnologist from the University of Turku, said in a Pensoft <a href=\"https:\/\/blog.pensoft.net\/2025\/08\/04\/new-tarantula-species-so-feisty-males-evolved-the-longest-genitalia-to-survive-mating\/\" rel=\"nofollow noopener\" target=\"_blank\">blog post<\/a> (Pensoft published ZooKeys). Yes, you read that right.<\/p>\n<p>\u201cThis species is highly defensive. At the slightest disturbance, it raises its front legs in a threat posture and produces a loud hissing sound by rubbing specialized hairs on the basal segments of the front legs against each other,\u201d Zamani added. In fact, ferox means \u201cfierce.\u201d<\/p>\n<p> \u201cSo yes, at least in tarantula taxonomy, it seems that size really does matter.\u201d <\/p>\n<p>In other words, Zamani and colleagues suggest S. ferox may have evolved to have such long genitals because it allows them to have sex without getting eaten by their partner. Talk about a love bite.<\/p>\n<p>In comparison, the other species\u2019 names are more boring. Researchers named S. speciosus for their beautiful colors and S. arabicus and S. somalicus for their regions of origin. According to the study, the new genus also includes a fifth Satyrex\u2014a known species previously classified in the genus Monocentropus, now called S. longimanus.<\/p>\n<p>\u201cThe much longer palps of S. longimanus and the four newly described species were among the primary characters that led us to establish a new genus for these spiders, rather than place them in Monocentropus,\u201d Zamani concludes. \u201cSo yes, at least in tarantula taxonomy, it seems that size really does matter.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"Researchers have just identified four new species of tarantulas whose genitals are so long they had to make&hellip;\n","protected":false},"author":2,"featured_media":49456,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[64,63,128,41987,25799,338],"class_list":{"0":"post-49455","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-wildlife","8":"tag-au","9":"tag-australia","10":"tag-science","11":"tag-spiders","12":"tag-taxonomy","13":"tag-wildlife"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/posts\/49455","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/comments?post=49455"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/posts\/49455\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/media\/49456"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/media?parent=49455"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/categories?post=49455"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/tags?post=49455"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}