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Large colonial organisms with coordinated growth in oxygenated environments 2.1 Gyr ago
The evidence for macroscopic life during the Palaeoproterozoic era (2.5–1.6 Gyr ago) is controversial. Except for the nearly 2-Gyr–old coil-shaped fossil Grypania spiralis, which may have beenExpand
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Agnathans and the origin of jawed vertebrates
The origins of jawed vertebrates (gnathostomes) lie somewhere within the ranks of long-extinct jawless fishes, represented today as the lampreys and hagfishes. Recent discoveries of hitherto unknownExpand
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Jaw transformation with gain of symmetry after Dlx5/Dlx6 inactivation: Mirror of the past?
Summary: In modern vertebrates upper and lower jaws are morphologically different. Both develop from the mandibular arch, which is colonized mostly by Hox‐free neural crest cells. Here we show thatExpand
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A primitive fossil fish sheds light on the origin of bony fishes
Living gnathostomes (jawed vertebrates) include chondrichthyans (sharks, rays and chimaeras) and osteichthyans or bony fishes. Living osteichthyans are divided into two lineages, namelyExpand
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The phylogeny of the Craniata, with particular reference to the significance of fossil “agnathans”
ABSTRACT The phylogenetic relationships of the extant Craniata are analyzed, and the position of the best known fossil groups of jawless craniates is discussed. Some of the patterns obtained areExpand
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Jaws and teeth of the earliest bony fishes
Extant jawed vertebrates, or gnathostomes, fall into two major monophyletic groups, namely chondrichthyans (cartilaginous fishes) and osteichthyans (bony fishes and tetrapods). Fossil representativesExpand
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Head and backbone of the Early Cambrian vertebrate Haikouichthys
Agnathan fish hold a key position in vertebrate evolution, especially regarding the origin of the head and neural-crest-derived tissue. In contrast to amphioxus, lampreys and other vertebratesExpand
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The Giant Cretaceous Coelacanth (Actinistia, Sarcopterygii) Megalocoelacanthus dobiei Schwimmer, Stewart & Williams, 1994, and Its Bearing on Latimerioidei Interrelationships
We present a redescription of Megalocoelacanthus dobiei, a giant fossil coelacanth from Upper Cretaceous strata of North America. Megalocoelacanthus has been previously described on the basis ofExpand
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Fossil jawless fish from China foreshadows early jawed vertebrate anatomy
Most living vertebrates are jawed vertebrates (gnathostomes), and the living jawless vertebrates (cyclostomes), hagfishes and lampreys, provide scarce information about the profound reorganization ofExpand
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