Scholarlink

Purpose <p>This work described a new species of <i>Ceratomyxa</i>, based on morphological and phylogenetic analyzes of myxospores collected from the gallbladder of the fish <i>Astyanax mexicanus</i>.</p> Methods <p>Sixty-two specimens were captured, between December 2022 and February 2024, in the Flexal River, in the community of Tessalônica, state of Amapá. The specimens were transported alive to the Laboratory of Morphophysiology and Animal Health, at the State University of Amapá, where the studies were carried out.</p> Results <p>Eleven specimes of <i>A. mexicanus</i> was parasitized with <i>Ceratomyxa tessaloniensis</i> n. sp. Morphological and morphometric analyses revealed strongly arched spores that measured 3.13 ± 0.5&#xa0;μm in length and 12.18 ± 1.9&#xa0;μm in thickness with a posterior angle of 74º ± 10.6º and two polar capsules measuring 1.74 ± 0.1&#xa0;μm long and 1.5 ± 0.16&#xa0;μm wide. The partial sequence of the 18&#xa0;S gene from spores of <i>Ceratomyxa tessaloniensis</i> n. sp., comprised 932 base pairs.</p> Conclusion <p>Phylogenetic analysis grouped <i>Ceratomyxa tessaloniensis</i> n. sp., with strong nodal support for the exclusive clade of freshwater species, being a new species described for the State of Amapá, the first described in <i>A. mexicanus</i> and the first species with the presence of non-wormlike plasmodia in South America.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Morphological and Phylogenetic Analyses of Ceratomyxa tessaloniensis n. sp. In Astyanax mexicanus De Fillipi, 1853 (Characiformes: Characidae) from the Flexal River, Tessalônica Community, Amapá, Amazon, Brazil

  • 期刊论文

  • 发表日期：

    2025年1月27日

查看全文
  • Saturo Cardoso,
  • Abthyllane Amaral de Carvalho,
  • Roger Leomar da Silva Ferreira,
  • Jhonata Eduard Farias de Oliveira,
  • Rafaela Franco de Araújo,
  • Lilia Suzane de Oliveira Nascimento,
  • José Ledamir Sindeaux Neto,
  • Marcela Nunes Videira,
  • Michele Velasco

摘要

Purpose

This work described a new species of Ceratomyxa, based on morphological and phylogenetic analyzes of myxospores collected from the gallbladder of the fish Astyanax mexicanus.

Methods

Sixty-two specimens were captured, between December 2022 and February 2024, in the Flexal River, in the community of Tessalônica, state of Amapá. The specimens were transported alive to the Laboratory of Morphophysiology and Animal Health, at the State University of Amapá, where the studies were carried out.

Results

Eleven specimes of A. mexicanus was parasitized with Ceratomyxa tessaloniensis n. sp. Morphological and morphometric analyses revealed strongly arched spores that measured 3.13 ± 0.5 μm in length and 12.18 ± 1.9 μm in thickness with a posterior angle of 74º ± 10.6º and two polar capsules measuring 1.74 ± 0.1 μm long and 1.5 ± 0.16 μm wide. The partial sequence of the 18 S gene from spores of Ceratomyxa tessaloniensis n. sp., comprised 932 base pairs.

Conclusion

Phylogenetic analysis grouped Ceratomyxa tessaloniensis n. sp., with strong nodal support for the exclusive clade of freshwater species, being a new species described for the State of Amapá, the first described in A. mexicanus and the first species with the presence of non-wormlike plasmodia in South America.