{"id":3560,"date":"2025-02-14T15:20:00","date_gmt":"2025-02-14T14:20:00","guid":{"rendered":"https:\/\/palaeonavix.bestmarke.de\/portfolio\/marine-invertebrates\/"},"modified":"2026-08-01T00:54:29","modified_gmt":"2026-07-31T22:54:29","slug":"marine-invertebrates","status":"publish","type":"avada_portfolio","link":"https:\/\/www.palaeonavix.org\/en\/portfolio\/marine-invertebrates\/","title":{"rendered":"Marine invertebrates: extant examples"},"content":{"rendered":"<p>Reconstructions of invertebrates are often a minor aspect because they require too much precision. Also, many exoskeletons adequately reflect the external shape. What may be true of many crustaceans or sea urchins unjustifiably obscures the great variety of soft tissues. This is proven by neontological examples: the pteriomorph clam <em>Lima<\/em>; the octopod <em>Argonauta<\/em>; the lingulate brachiopod <em>Lingula<\/em>.<\/p>\n<p>The isolated <em>Argonauta<\/em> arm shell or eggcase (background) is produced exclusively by females and is used for reproduction, partly for locomotion. There are other examples of tools directly secreted from animals\u2019 bodies, such as spider webs, cocoons, mucus webs of hagfish, beeswax, or swiftlet\u2019s nests. However, these are stationary, or temporarily bound to situations. Similarly, feathers torn out by force are used as nesting material, for example by eider ducks. It remains that the argonaut\u2019s shell is presumably the only mobile and durable object that it secreted and used by the same animal.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Digital painting of three extant invertebrates \u2013 and what their soft tissues hide from the fossil record.<\/p>\n","protected":false},"author":1,"featured_media":3558,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"pn_jahr":"2024","pn_taxon":"Lima; Argonauta; Lingula","pn_auftraggeber":"TU Bergakademie Freiberg","pn_ausstellung":"","pn_masse":"","pn_quelle_url":"","pn_lizenz":"\u00a9 Palaeonavix","pn_alt_url":"https:\/\/www.palaeonavix.org\/index.php\/bio-illustration\/marine-invertebrates","pn_mitwirkende":"","footnotes":""},"portfolio_category":[159],"portfolio_skills":[],"portfolio_tags":[],"class_list":["post-3560","avada_portfolio","type-avada_portfolio","status-publish","format-standard","has-post-thumbnail","hentry","portfolio_category-biological-illustration"],"acf":{"pn_jahr":"2024","pn_taxon":"Lima; Argonauta; Lingula","pn_auftraggeber":"TU Bergakademie Freiberg","pn_ausstellung":"","pn_masse":"","pn_quelle_url":"","pn_lizenz":"\u00a9 Palaeonavix","pn_mitwirkende":"","pn_verwandte":[3840,3798],"pn_links":[{"bezeichnung":"Tech.Univ. Bergakademie Freiberg","url":"https:\/\/tu-freiberg.de\/fakultaet3\/geo\/palaeo"}],"pn_publikationen":null,"pn_alt_url":"https:\/\/www.palaeonavix.org\/index.php\/bio-illustration\/marine-invertebrates"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Marine invertebrates: extant examples - Palaeonavix<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.palaeonavix.org\/en\/portfolio\/marine-invertebrates\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Marine invertebrates: extant examples - Palaeonavix\" \/>\n<meta property=\"og:description\" content=\"Digital painting of three extant invertebrates \u2013 and what their soft tissues hide from the fossil record.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.palaeonavix.org\/en\/portfolio\/marine-invertebrates\/\" \/>\n<meta property=\"og:site_name\" content=\"Palaeonavix\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-31T22:54:29+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.palaeonavix.org\/wp-content\/uploads\/2026\/07\/rezente-wirbellose-meerestiere.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"720\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.palaeonavix.org\\\/en\\\/portfolio\\\/marine-invertebrates\\\/\",\"url\":\"https:\\\/\\\/www.palaeonavix.org\\\/en\\\/portfolio\\\/marine-invertebrates\\\/\",\"name\":\"Marine invertebrates: extant examples - 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