Introduction

Members of the genus Mymarothecium Kritsky, Boeger & Jégu, 1996 infect characiform fish in the Amazon River Basin. Although the Peruvian Amazon hosts rich fauna of fish, the taxonomic diversity of parasitic organisms such as Mymarothecium has been few explored. A new species of Mymarothecium in Colossoma macropomum Cuvier, from the southeast of the Peruvian Amazon, is described.

Methods

Monogeneans were isolated from gills of C. macropomum, fixed in formaldehyde in 4% solution. For morphological examinations were stained with Gomori’s trichrome and others were clarified with Hoyer’s medium.

Results

Mymarothecium is the third species of the genus recorded in C. macropomum. These new species have been characterized by a slightly sigmoid male copulatory organ (MCO) and the accessory piece with sinuous distal rod with hook-shaped process and a bifurcation in the middle part. Furthermore, the anteromedial projection of the ventral rod has a small conspicuous filament in both anchors.

Conclusions

With the description of this new species, eight species of Mymarothecium have been reported in fish of the Serrasalmidae family originating in the Amazon.

中文翻译：

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Mymarothecium tantaliani n 的一个新种。来自秘鲁马德雷德迪奥斯的 Gamitana Colossoma macropomum (Cuvier) 鳃中的 sp (Monogenea: Dactylogiridae)。

简介

Mymarothecium Kritsky, Boeger & Jégu属的成员，1996 年在亚马逊河流域感染了characiform 鱼。尽管秘鲁亚马逊地区拥有丰富的鱼类群落，但很少有人探索过寄生生物如Mymarothecium的分类多样性。一新种Mymarothecium在淡水白macropomum居维叶，从秘鲁亚马逊东南部，进行说明。

方法

Monogeneans 从C. macropomum 的鳃中分离出来，固定在 4% 的甲醛溶液中。形态学检查用 Gomori 三色染色，其他用 Hoyer 培养基澄清。

结果

Mymarothecium是C. macropomum 中记录的该属的第三种。这些新物种的特征是略呈乙状的雄性交配器官（MCO）和带有钩状突起的弯曲远端杆和中间部分分叉的附件。此外，腹侧杆的前内侧突起在两个锚点中都有一条小而显眼的细丝。

结论

随着对这个新物种的描述，在起源于亚马逊的锯齿鲼科鱼类中已经报道了八种Mymarothecium。