About the Book
This book consists of articles from Wikia. Pages: 33. Chapters: Cambrian animals, Carboniferous animals, Devonian animals, Eurypterida, Ordovician animals, Permian animals, Silurian animals, Trilobites, Ammagnostidae, Archaeocyatha, Archaeopriapulida, Cambropallas, Elrathia, Halkieria, Kleptothule rasmusseni, Kockurus, Kodymirus, Myllokunmingia, Pikaia, Carboniferous tetrapods, Lepospondyli, Loxommatidae, Lysorophia, Pulmonoscorpius, Westlothiana, Acanthostega, Acutiramus, Dicranurus, Ductina, Encrinuridae, Erbenochile, Hynerpeton, Ichthyostega, Lichida, Promissum, Schinderhannes, Acutiramus, Palmichnium, Ammagnostidae, Isotelus, Lichida, Promissum, Hyolitha, Discosauriscus, Lysorophia, Permian tetrapods, Seymouria, Acutiramus, Encrinuridae, Lichida, Petalocrinus, Promissum, Ammagnostidae, Asaphus, Beecher's Trilobite Beds, Calymene, Calymene blumenbachi, Cambropallas, Cephalic spine, Diacalymene, Dicranurus, Ductina, Eldredgeia, Elrathia, Encrinuridae, Erbenochile, Phacopidae, Trilobita. Excerpt: Agnostus is a genus of trilobites that lived approximately 540 to 438 million years ago. The agnostids were small (Agnostus measuring only 6 millimeters), with two thoracic segments and a large tail. Template: Wikispeciespl: Agnostus Ammagnostidae is a family of trilobites in the superfamily Agnostoidea, which is part of the order Agnostida, or small, 2 or 3 segmented trilobites. It has four genera: Ammagnostus Opik, 1967 Hadragnostus Opik, 1967 Kormagnostus Resser, 1938 Proagnostus Butts, 1926 They occurred during the late Cambrian period to the Ordovician period. The Archaeocyatha or archaeocyathids ("ancient cups") were sessile, reef-building marine organisms of warm tropical and subtropical waters that lived during the early (lower) Cambrian period. They are first known from the beginning of the Tommotian Age of the Cambrian, about 530 million years ago (mya), and quickly diversified into over a hundred families. They became the planet's very first reef building a...
