Hemichordates are a phylum of marine invertebrate animals. They are the sister group of echinoderms and most have a soft, often worm-shaped, body. They first appear in the fossil record in the Cambrian period over 510 million years ago.<\/p>\n","protected":false},"excerpt":{"rendered":"
Hemichordates are a phylum of marine invertebrate animals. They are the sister group of echinoderms and most have a soft, often worm-shaped, body. They first appear in the fossil record in the Cambrian period over 510 million years ago.<\/p>\n","protected":false},"author":6,"featured_media":0,"parent":354,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3800","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.palaeontologyonline.com\/index.php?rest_route=\/wp\/v2\/pages\/3800","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.palaeontologyonline.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.palaeontologyonline.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.palaeontologyonline.com\/index.php?rest_route=\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.palaeontologyonline.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3800"}],"version-history":[{"count":1,"href":"https:\/\/www.palaeontologyonline.com\/index.php?rest_route=\/wp\/v2\/pages\/3800\/revisions"}],"predecessor-version":[{"id":3801,"href":"https:\/\/www.palaeontologyonline.com\/index.php?rest_route=\/wp\/v2\/pages\/3800\/revisions\/3801"}],"up":[{"embeddable":true,"href":"https:\/\/www.palaeontologyonline.com\/index.php?rest_route=\/wp\/v2\/pages\/354"}],"wp:attachment":[{"href":"https:\/\/www.palaeontologyonline.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3800"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}