Scholarlink

<p>The study of the monogenean fauna of <i>Brycinus kingsleyae</i>, <i>Brycinus macrolepidotus</i>, <i>Phenacogrammus major</i> and <i>Hepsetus odoe</i>, four characiform fishes consumed in Cameroon allowed to find seven species of <i>Annulotrema</i> Paperna and Thurston, 1969 and provided new information for the diagnosis of these helminths. Concerning the parasites of <i>Brycinus kingsleyae</i>: in <i>Annulotrema combesi</i> Birgi, 1988, the copulatory tube can make two turns of spire contrary to the initial description which indicates a single turn; on the dorsal bar of <i>Anulotrema maillardi</i> Birgi, 1988, a sclerotized structure was observed for the first time; a loop was also noted for the first time on the ventral bar of <i>Annulotrema nyongesnsis</i> Birgi, 1988. For parasites of <i>Phenacogrammus major</i>, the vagina was observed for the first time in <i>Annulotrema gabrioni</i> Birgi, 1988. A membrane extension never reported on the dorsal transverse bar of <i>Annulotrema hepseti</i> Paperna and Thurston, 1969, a parasite of <i>Hepsetus odoe</i> was observed during this study. Principal Component Analysis (PCA) allowed the assignment of a morphogroup to the two recently described species in <i>Brycinus macrolepidotus</i>. Thus, a new morphogroup named <i>Ngombiensis</i> n. gr. was created to classify <i>Annulotrema ngombiensis</i> Ndongo and Tombi, 2023. As for <i>Annulotrema nkengfacki</i> Ndongo and Tombi, 2023, its morphometric characteristics allow it to be associated with the <i>Nyongensis</i> group created by Birgi in 1988.</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

Annulotrema spp. (Monogenea: Dactylogyridae) from Characiformes of Cameroon: additional morphological observations and proposal of a new morphogroup

  • 期刊论文

  • 发表日期：

    2026年2月6日

查看全文
  • Tombi Jeannette,
  • Ndongo Ivan,
  • Onana Ngono Michel Thierry,
  • Akoumba John Francis,
  • Fomena Abraham

摘要

The study of the monogenean fauna of Brycinus kingsleyae, Brycinus macrolepidotus, Phenacogrammus major and Hepsetus odoe, four characiform fishes consumed in Cameroon allowed to find seven species of Annulotrema Paperna and Thurston, 1969 and provided new information for the diagnosis of these helminths. Concerning the parasites of Brycinus kingsleyae: in Annulotrema combesi Birgi, 1988, the copulatory tube can make two turns of spire contrary to the initial description which indicates a single turn; on the dorsal bar of Anulotrema maillardi Birgi, 1988, a sclerotized structure was observed for the first time; a loop was also noted for the first time on the ventral bar of Annulotrema nyongesnsis Birgi, 1988. For parasites of Phenacogrammus major, the vagina was observed for the first time in Annulotrema gabrioni Birgi, 1988. A membrane extension never reported on the dorsal transverse bar of Annulotrema hepseti Paperna and Thurston, 1969, a parasite of Hepsetus odoe was observed during this study. Principal Component Analysis (PCA) allowed the assignment of a morphogroup to the two recently described species in Brycinus macrolepidotus. Thus, a new morphogroup named Ngombiensis n. gr. was created to classify Annulotrema ngombiensis Ndongo and Tombi, 2023. As for Annulotrema nkengfacki Ndongo and Tombi, 2023, its morphometric characteristics allow it to be associated with the Nyongensis group created by Birgi in 1988.