WebJun 1, 2008 · Yunnanozoans (including Yunnanozoon and Haikouella) are important representatives of the primitive vertebrates in the Early Cambrian Chengjiang fauna. For … WebDec 3, 1999 · Haikouella also has a puffed-up back that seems to contain segmented muscles—another key chordate feature. What's more, the animal seems to have a relatively large brain, and what appear to be two eyes, suggesting that it may be a very early member of the vertebrates—which would put it somewhere on the first steps of the long road to …
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WebFeb 10, 2006 · Large gene regulatory networks (GRNs) that determine the course of animal development are now being decoded experimentally [e.g., (1–8)].These networks consist largely of the functional linkages among regulatory genes that produce transcription factors and their target cis-regulatory modules in other regulatory genes, together with genes … WebName: Haikouella lanceolata and Vetulicolia; Xidazoon stephanus ( Chengjiang Maotianshan Shales) see Kingdon Animalia Geologic Time: Early Cambrian (~525 million years ago) Size (25.4mm=1 inch): Haikouella: 15-19 mm long Xidazoon: 85 mm long (folded) on opposite sides of a 60 mm by 75 mm matrix termofor suchy
Gill rays of primitive vertebrate Yunnanozoon from Early …
WebHaikouella lanceolata Haikouella is known from 305 specimens mostly from a single bed in the Maotianshan shales of Yunnan province. The animal is 20 to 30 mm (40 mm max) … WebPikaia à tổ tiên mang tính biểu tượng của động vật có dây sống hiện đại và động vật có xương sống. Số khác thì là những thể tiền thân sớm hơn, bao gồm động vật có dây sống Myllokunmingia fengjiaoa, Haikouella lanceolata, và Haikouichthys ercaicunensis. WebHaikouella is an agnathan chordate from the Lower Cambrian Maotianshan Shales of Chengjiang County in Yunnan Province, China. An analysis in 2015 placed Haikouella as a junior synonym of Yunnanozoon, another Maotianshan shale Cambrian chordate.[3][4] trick flow a460 intake manifold