Massimo Luciani<p><a href="https://mastodon.social/tags/paleontology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>paleontology</span></a> <a href="https://mastodon.social/tags/fossils" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>fossils</span></a> <a href="https://mastodon.social/tags/Cambrian" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Cambrian</span></a> <a href="https://mastodon.social/tags/Helmetia" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Helmetia</span></a> <a href="https://mastodon.social/tags/HelmetiaExpansa" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HelmetiaExpansa</span></a> <a href="https://mastodon.social/tags/arthropods" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>arthropods</span></a> </p><p>An article published in the "Journal of Systematic PalaeontologyJournal of Systematic Palaeontology" reports a study of Helmetia expansa, a species of arthropod that lived about 505 million years ago, in the Middle Cambrian period. Sarah Losso, Jean-Bernard Caron, and Javier Ortega-Hernández examined the fossils discovered over the years. </p><p><a href="https://english.netmassimo.com/2025/04/09/an-accurate-description-of-helmetia-expansa-fossils-over-a-century-after-their-discovery/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">english.netmassimo.com/2025/04</span><span class="invisible">/09/an-accurate-description-of-helmetia-expansa-fossils-over-a-century-after-their-discovery/</span></a></p>