Oliva Marcelo E, Sepúlveda Fabiola A, Escribano Rubén, Ñacari Luis A
Instituto Ciencias Naturales Alexander von Humboldt, Universidad de Antofagasta, Angamos 601, Antofagasta, Chile Universidad de Antofagasta Antofagasta Chile.
Instituto Milenio de Oceanografía, Universidad de Concepción, Concepción, Chile Universidad de Concepción Concepción Chile.
Zookeys. 2024 Dec 31;1221:435-447. doi: 10.3897/zookeys.1221.135086. eCollection 2024.
a new species of deep-sea digenean, parasitizing the gallbladder of the "Bigeye grenadier" ( Günther, 1878) in the deep waters of the southeastern Pacific Ocean is described on the basis of morphological and molecular (28S rRNA) data. The new species is distinguishable from Yamaguti, 1940, the only other member of the genus, by its subterminal oral sucker, the position of the ovary and testes, the larger anterior seminal vesicle compared to the posterior one, and its larger eggs. In addition, the new species is a parasite of a deep-sea fish, whereas is a parasite of shallow-water fish. A phylogenetic tree, based on 28S rDNA sequences, indicates that this species is included in a clade of deep-sea fellodistomid species ( spp.). We provide the first molecular data on the genus Yamaguti, 1940 and expand the molecular database for the family Fellodistomidae. Further studies, including sequences from other fellodistomid taxa, are needed to more precisely infer relationships within this family.
基于形态学和分子（28S rRNA）数据，描述了一种新的深海复殖吸虫，它寄生于东南太平洋深水中的“大眼长尾鳕”（冈瑟，1878年）的胆囊。该新物种与1940年的山口复殖吸虫（Yamaguti）不同，后者是该属的唯一另一个成员，其区别在于口吸盘位于亚末端、卵巢和睾丸的位置、前精囊比后精囊大以及其卵更大。此外，新物种是一种深海鱼类的寄生虫，而山口复殖吸虫是浅水鱼类的寄生虫。基于28S rDNA序列的系统发育树表明，该物种包含在深海费氏吸虫属物种（Fellodistomum spp.）的一个分支中。我们提供了关于1940年山口复殖吸虫属的首个分子数据，并扩展了费氏吸虫科的分子数据库。需要进一步的研究，包括来自其他费氏吸虫类群的序列，以更精确地推断该科内的关系。
