这个词是什么意思？
A freshwater water flea with distinctly stout middle pecten of the postabdominal claw and small symmetrical polygonal markings on the rostrum. D. pulex and several closely related species such as D. pulicaria belong to what is sometimes known as D. pulex complex and can hybridize. Daphnia pulex is found ubiquitously and is often the most common species in ephemeral pools and is a model system for various ecological, ecotoxicological and biomedical studies.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D000096604 · MeSH 2026。
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