Lozano-Cobo Horacio, Gómez Del Prado-Rosas María Del Carmen, Silva-Segundo Claudia A, Oceguera-Figueroa Alejandro, Gómez-Gutiérrez Jaime
Departamento de Plancton y Ecología Marina, Centro Interdisciplinario de Ciencias Marinas, Instituto Politécnico Nacional, Av. IPN s/n, 23096, La Paz, B.C.S, Mexico.
Departamento de Hidrobiología, Universidad Autónoma Metropolitana, Unidad Iztapalapa. Av. San Rafael Atlixco No. 186, Col. Vicentina, 09340, Mexico, Mexico.
Acta Parasitol. 2021 Dec;66(4):1586-1592. doi: 10.1007/s11686-021-00400-9. Epub 2021 May 25.
Endo-parasites of the bathypelagic king of herrings Regalecus glesne and oarfish Regalecus russelii are only known from few specimens opportunistically examined. As a consequence, there are few records of parasites from either Regalecus species. We report plerocercoid larvae of phyllobothriidean cestodes parasitizing an adult R. glesne stranded in Bahía de La Paz, Baja California Sur, Mexico.
Sixty-three plerocercoids were obtained from the intestine of R. glesne and characterized using morphological and molecular methods (nuclear 28S rDNA and mitochondrial cytochrome c oxidase I gene sequences).
Following the morphological diagnostic criteria of scolex and muscle bands in the strobila, plerocercoids specimens were preliminary assigned to the genus Clistobothrium. Mitochondrial and nuclear DNA sequences indicate these plerocercoids correspond to Clistobothrium montaukensis Ruhnke, 1993.
Regalecus glesne is a new host known for C. montaukensis and this report is a new geographical record of C. montaukensis parasitizing species of the genus Regalecus previously known only from California and Florida, USA.
深海皇带鱼（Regalecus glesne）和桨鱼（Regalecus russelii）的体内寄生虫仅在少数偶然检查的标本中被发现。因此，关于这两种皇带鱼属物种的寄生虫记录很少。我们报告了在墨西哥南下加利福尼亚州拉巴斯湾搁浅的一条成年皇带鱼体内寄生的叶槽绦虫的裂头蚴幼虫。
从皇带鱼的肠道中获得了63条裂头蚴，并使用形态学和分子方法（核28S rDNA和线粒体细胞色素c氧化酶I基因序列）进行了鉴定。
根据头节和节片中肌肉带的形态学诊断标准，裂头蚴标本初步被归为Clistobothrium属。线粒体和核DNA序列表明这些裂头蚴与1993年的蒙托克Clistobothrium（Clistobothrium montaukensis）相对应。
皇带鱼是蒙托克Clistobothrium已知的新宿主，本报告是蒙托克Clistobothrium寄生皇带鱼属物种的新地理记录，此前该寄生虫仅在美国加利福尼亚州和佛罗里达州被发现。
