Genome assembly of the tetraploid fish <i>Sinocyclocheilus rhinocerous</i>
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<i>Sinocyclocheilus rhinocerous</i> is a unique troglobitic cavefish native to the subterranean ecosystems of China, exhibiting morphological adaptations suited for life in darkness. This species is distinguished by a prominent anterior horn and a dorsal hump, showcasing considerable structural differences from its surface-dwelling counterparts. It possesses a degenerated ocular structure characterized by small, non-functional eyes and exhibits a lack of pigmentation unless exposed to light, illustrating its adaptation to an environment devoid of sunlight. The fish has a reduced number of scales and features a flattened anterior nasal region with a dorsal surface that slopes posteriorly. Importantly, <i>S. rhinocerous</i> is equipped with a comprehensive array of superficial neuromasts along its lateral surfaces, potentially enhancing its mechanosensory abilities in low-light conditions. In contrast to troglophilic relatives, <i>S. rhinocerous</i> displays a less streamlined body, characterized by increased dorso-ventral elongation and energy-intensive anterior protrusions. [adapted from Lei et al. (2022)] <br>We present a publicly available scaffold-level genome assembly of <i>Sinocyclocheilus rhinocerous</i>, established from pseudochromosome reconstruction based on the reference chromosome-level assembly of <i>S. grahami</i>. The BUSCO analysis indicates a completeness of 94.3%.
<i>犀角金线鲃（Sinocyclocheilus rhinocerous）是一种独特的穴居性洞穴鱼类，原产于中国的地下生态系统，具备适应黑暗环境的形态学适应性特征。该物种以突出的前角与背部隆起为显著标志，与地表栖息的同类存在显著的结构差异。其眼部结构发生退化，表现为细小且无功能的眼睛；且除非暴露于光照环境，否则体表缺乏色素沉着，这体现了其对无光环境的适应策略。该物种鳞片数量减少，前部鼻部区域扁平，背面呈向后倾斜的形态。值得注意的是，<i>犀角金线鲃</i>沿体侧分布有大量浅表神经丘，可潜在提升其在低光照条件下的机械感知能力。与喜洞居的近缘物种不同，<i>犀角金线鲃</i>的体型流线型较差，表现为背腹侧伸长增加，且前部存在耗能较高的突出结构。[改编自Lei等人（2022）的研究]<br>我们公开了<i>犀角金线鲃</i>的支架级基因组组装结果，该组装基于滇池金线鲃（S. grahami）的参考染色体级组装进行假染色体构建。BUSCO分析显示其组装完整度为94.3%。
