摘要
Four species belonging to the genus Orchistoma in the monotypic family Orchistomatidae are currently recognized from several localities around the world, but none of these have been reported from the Northwest Pacific, including Japan. In this study, juvenile medusae collected in Tanabe Bay, Wakayama Prefecture were raised to full maturity and used to describe a new species, Orchistoma integrale sp. nov., based on integrated analysis of morphological and molecular data. Orchistoma integrale can be distinguished from its congeners by several morphological features, including prominently curled gonads and scattered nematocysts on the umbrella. Our molecular characterization of this species, connected to its type material, will allow the species to be detected through emerging genetic techniques involving eDNA derived from environmental samples. This is the first record of this family in Japan. We also describe medusa development from juvenile to adult.
摘要译文
目前，世界各地的几个地区都认可了属于单型家族兰科属属属属属的四种物种，但尚未从包括日本在内的西北太平洋（包括日本）据报道。在这项研究中，在塔纳贝湾收集的少年少将（Wakayama）县被提高到完全成熟，并用来描述一种新物种Orchistoma Integrale sp。11月，基于形态和分子数据的综合分析。可以通过几种形态学特征来区分兰花整数，包括明显的卷曲的性腺和伞上散落的黑粒细胞。我们对该物种的分子表征与该物质相关，将使该物种通过涉及来自环境样品的EDNA的新兴遗传技术检测到该物种。这是日本这个家庭的第一个记录。我们还描述了从少年到成人的美杜莎发展。
Ryoya Sugimoto;Takato Izumi;Allen G. Collins. Orchistoma integrale sp. nov. (Hydrozoa, Orchistomatidae), a new species of hydromedusa with the first record of the genus from the Northwest Pacific[J]. Plankton and Benthos Research, 2025,20(1): 62-75