Neuroanatomy of a hydrothermal vent shrimp provides insights into the evolution of crustacean integrative brain centers
Neuroanatomy of a hydrothermal vent shrimp provides insights into the evolution of crustacean integrative brain centers
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DOI：
10.7554/elife.47550
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发表时间：
2019-08-06
期刊：
影响因子：
7.7
通讯作者：
Harzsch, Steffen
中科院分区：
文献类型：
--
作者：
Machon, Julia;Krieger, Jakob;Harzsch, Steffen
Alvinocaridid虾是大西洋中脊深海热液喷口动物群的象征性代表。它们适应于热液流体排放附近具有极端物理化学条件的大部分无光生境。在这里，我们调查了大脑架构的喷口虾Rimicaris exoculata了解可能的适应其神经系统的热液感官景观。它的大脑是从甲壳类动物的大脑基础模式修改，具有相对较小的视觉和嗅觉神经柱，与发达的更高的整合中心，半椭圆体形成对比。我们建议，这些结构在喷口虾可能履行的功能，除了高阶感官处理，并建议在地方记忆的作用。我们的研究促进了喷口虾作为迷人的模型，以深入了解对特殊环境条件的感官适应，以及甲壳纲动物特定大脑区域的进化转型。
Alvinocaridid shrimps are emblematic representatives of the deep hydrothermal vent fauna at the Mid-Atlantic Ridge. They are adapted to a mostly aphotic habitat with extreme physicochemical conditions in the vicinity of the hydrothermal fluid emissions. Here, we investigated the brain architecture of the vent shrimp Rimicaris exoculata to understand possible adaptations of its nervous system to the hydrothermal sensory landscape. Its brain is modified from the crustacean brain ground pattern by featuring relatively small visual and olfactory neuropils that contrast with well-developed higher integrative centers, the hemiellipsoid bodies. We propose that these structures in vent shrimps may fulfill functions in addition to higher order sensory processing and suggest a role in place memory. Our study promotes vent shrimps as fascinating models to gain insights into sensory adaptations to peculiar environmental conditions, and the evolutionary transformation of specific brain areas in Crustacea.