Neotropical Monogenoidea 62. Biotodomella mirospinata gen. nov., sp. nov. (Polyonchoinea: Dactylogyridae): a parasite of the gills of Biotodoma cupido (Cichliformes: Cichlidae), from the Peruvian Amazon

ABSTRACT Biotodomella gen. nov. (Monogenoidea: Dactylogyridae) is proposed to accommodate Biotodomella mirospinata sp. nov., found on the gills of Biotodoma cupido (Heckel, 1840) (“cara bonita” or “green-streaked eartheater”), a freshwater cichlid from the Peruvian Amazon. The new genus and species differ from other Neotropical dactylogyrids in having the hooks of each hook pair well-differentiated from the remaining pairs, shafts varying in robustness, weakly sclerotized expansions at the proximal end of shaft, and a dorsal anchor with grooved shaft, bifid point. This study represents the first record of a monogenoid from a species of Biotodoma Eigenmann & Kennedy, 1903.

【摘要】本文建立Biotodomella新属（gen. nov.），隶属于单殖吸虫总科（Monogenoidea）指环虫科（Dactylogyridae），以容纳采自秘鲁亚马逊流域淡水慈鲷双孔丽体鱼（Biotodoma cupido，Heckel, 1840，俗称"cara bonita"或"绿纹食土鲷（green-streaked eartheater）"）鳃部的Biotodomella mirospinata新种（sp. nov.）。该新属与新种区别于其他新热带界指环虫科物种的特征为：每对锚钩均与其余锚钩对显著分化，钩柄粗细不均，钩柄近端存在轻度硬化的膨起结构，且背锚具有带沟的钩柄与分叉的尖端。本研究为单殖吸虫类群在双孔丽体鱼属（Biotodoma Eigenmann & Kennedy, 1903）鱼类上的首次报道。