Title |
Embryonic neurogenesis in Pseudopallene sp. (Arthropoda, Pycnogonida) includes two subsequent phases with similarities to different arthropod groups
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Published in |
EvoDevo, November 2013
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DOI | 10.1186/2041-9139-4-32 |
Pubmed ID | |
Authors |
Georg Brenneis, Angelika Stollewerk, Gerhard Scholtz |
Abstract |
Studies on early neurogenesis have had considerable impact on the discussion of the phylogenetic relationships of arthropods, having revealed striking similarities and differences between the major lineages. In Hexapoda and crustaceans, neurogenesis involves the neuroblast, a type of neural stem cell. In each hemi-segment, a set of neuroblasts produces neural cells by repeated asymmetrical and interiorly directed divisions. In Euchelicerata and Myriapoda, neurogenesis lacks neural stem cells, featuring instead direct immigration of neural cell groups from fixed sites in the neuroectoderm. Accordingly, neural stem cells were hitherto assumed to be an evolutionary novelty of the Tetraconata (Hexapoda + crustaceans). To further test this hypothesis, we investigated neurogenesis in Pycnogonida, or sea spiders, a group of marine arthropods with close affinities to euchelicerates. |
X Demographics
Geographical breakdown
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United Kingdom | 1 | 100% |
Demographic breakdown
Type | Count | As % |
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Members of the public | 1 | 100% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
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United States | 1 | 3% |
Unknown | 36 | 97% |
Demographic breakdown
Readers by professional status | Count | As % |
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Researcher | 13 | 35% |
Student > Ph. D. Student | 7 | 19% |
Student > Bachelor | 3 | 8% |
Professor | 2 | 5% |
Student > Master | 2 | 5% |
Other | 3 | 8% |
Unknown | 7 | 19% |
Readers by discipline | Count | As % |
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Agricultural and Biological Sciences | 20 | 54% |
Biochemistry, Genetics and Molecular Biology | 6 | 16% |
Neuroscience | 1 | 3% |
Unknown | 10 | 27% |