Araújo Rafaela Franco de, Carvalho Abthyllane Amaral de, Ferreira Roger Leomar da Silva, Morais Saturo Cardoso, Reis Luize Cristine Pantoja Dos, Oliveira Pedro Lucas Dos Santos de, Videira Marcela Nunes, Feiden Aldi
Universidade Estadual do Oeste do Paraná - UNIOESTE, Toledo, PR, Brasil.
Universidade do Estado do Amapá - UEAP, Macapá, AP, Brasil.
Rev Bras Parasitol Vet. 2024 Dec 13;33(4):e018324. doi: 10.1590/S1984-29612024075. eCollection 2024.
A new parasite of the Class Myxozoa is described in the gallbladder of the ornamental angelfish Pterophyllum scalare, in two municipalities in the state of Amapá, Brazil, based on morphological, morphometric and phylogenetic descriptions. From October 2022 to August 2024 fifty-five angelfish specimens were sampled in Macapá (n=10) and Tartarugalzinho (n=45). Slightly arched mixospores were observed by light microscopy and had characteristics consistent with those of the genus Ceratomyxa. These obtained an average length of 1.6 ± 0.2 µm and 11.5 ± 1.1 µm in thickness. The polar capsules were subspherical and 0.7 ± 0.1 µm long and 0.6 ± 0.1 µm wide, with 3 to 4 turns of the polar filament. Phylogenetic analysis showed that the new species is grouped in the family Ceratomyxidae, in addition to being positioned in the same subclade of freshwater ceratomyxids from the Brazilian Amazon, demonstrating that this species shares a common ancestor with its close relatives, based on geographic affinity. Ceratomyxa tavariensis n. sp. is the first species of the class Myxozoa described infecting angelfish in Brazil, and the thirteenth species of Ceratomyxa described in the country.
基于形态学、形态测量学和系统发育学描述，在巴西阿马帕州的两个市，一种新的粘孢子虫纲寄生虫在观赏神仙鱼（Pterophyllum scalare）的胆囊中被发现。2022年10月至2024年8月期间，在马卡帕（n = 10）和小龟岛（n = 45）采集了55条神仙鱼样本。通过光学显微镜观察到略呈拱形的混和孢子，其特征与Ceratomyxa属一致。这些孢子的平均长度为1.6 ± 0.2 µm，厚度为11.5 ± 1.1 µm。极囊呈亚球形，长0.7 ± 0.1 µm，宽0.6 ± 0.1 µm，极丝有3至4圈。系统发育分析表明，该新物种归入Ceratomyxidae科，此外还与巴西亚马逊地区的淡水Ceratomyxa属物种位于同一亚分支，基于地理亲缘关系表明该物种与其近亲有共同的祖先。塔瓦里氏Ceratomyxa（Ceratomyxa tavariensis）新种是巴西描述的第一种感染神仙鱼的粘孢子虫纲物种，也是该国描述的第13种Ceratomyxa属物种。
