https://theconversation.com/humans-closest-invertebrate-ancestors-date-back-much-further-than-thought-how-we-discovered-the-fossils-that-show-this-279793; https://www.science.org/doi/10.1126/science.adu2291 (abstract only). "Most striking of all, we found the oldest #evidence for the group to which we #humans belong: the deuterostomes. Several of these specimens have a stalk & tentacles, & closely resemble a group of #Cambrian #fossils called cambroernids. These now-extinct #animals are related to living starfish & acorn worms - the closest #invertebrate relatives to humans." See: https://en.wikipedia.org/wiki/Deuterostome.
Humans’ closest invertebrate ancestors date back much further than thought – how we discovered the fossils that show this

Did Earth’s major diversification event really happen in one sudden explosion? Our fossil discovery suggests not.

The Conversation
New fossil deposits show complex animal groups predating the Cambrian https://arstechni.ca/JyYJ #paleontology #ediacaran #evolution #Cambrian #Science #Biology #fossils
New fossil deposits show complex animal groups predating the Cambrian

Collection of fossils includes Ediacaran, Cambrian species, suggesting a transition.

Ars Technica
A Billion Years Are Mysteriously Missing From #Earth’s History. Now, We Know Why.
#TheGreatUnconformity — a gap in Earth’s #geologicalrecord. New research suggests it was created by shifting continents, rather than “#SnowballEarth” or #Cambrian life. Evidence that the gap was largely created by #tectonic processes that occurred from 2.1B to 1.6B years ago, in the #Neoproterozoic era, during the formation of an ancient supercontinent called Columbia
https://www.404media.co/great-unconformity-gap-geological-record-study-columbia/
https://archive.ph/glmuh
A Billion Years Are Mysteriously Missing From Earth’s History. Now, We Know Why.

The Great Unconformity — a gap in Earth’s geological record — has puzzled scientists for 150 years. New research suggests it was created by shifting continents, rather than “snowball Earths” or Cambrian life.

404 Media
#Cambrian ( /ˈkæmbri.ən, ˈkeɪm-/ KAM-bree-ən, KAYM-) is the first geological period of the #Paleozoic Era and the #Phanerozoic Eon.[5] The Cambrian lasted 51.95 millio
El Herpetogaster fue un animal, posiblemente gregario, de 3-4 cm del Cámbrico temprano (505 MdA) con un estolón que lo fijaba al suelo oceánico y unos tentáculos con los que podría haber capturado su alimento. 📷Marianne Collins #cambrico #cambrian
El Saccorhytus coronarius fue un animal del Cámbrico (540 MdA) de 1,3 mm con una gran boca. Probablemente formara parte de la meiofauna, viviendo en la arena. 📷PaleoEquii #cambrico #cambrian
El Myllokunmingia fengjiaoa fue un cordado del Cámbrico inferior (518 MdA) de 28 mm de largo. No hay consenso sobre si se trata un vertebrado pero, si lo fuera, sería el más antiguo conocido. Tenía cuatro ojos, conservándose los dos centrales en nuestra glándula pineal. 📷Nix #cambrico #cambrian
Marrella splendens fue un artrópodo marino filtrador del Cámbrico medio (507-497 MdA). Gracias a un fósil en ecdisis, se sabe que mudaba su exoesqueleto. 🏛️Museo de las Ciencias de Trento #cambrico #cambrian
El Kerygmachela kierkegaardi es un lobopodio (como el "gusano" de Shingeki no kyojin) branquiado del Cámbrico (521-514 MdA) similar al radiodonto Anomalocaris. Aunque se cree que fue un depredador, su boca pequeña habría restringido el tamaño de sus presas. 📷Junnn11 #cambrico #cambrian
Bristolia insolens es un trilobite del Cámbrico inferior (522-516 MdA) con enormes espinas genales, situadas frente a los ojos y curvadas hacia atrás.📷YXWYX #trilobite #cambrico #cambrian