Negreiros Luciano P, Tavares-Dias Marcos, Pereira Felipe B
Programa de Pós-Graduação em Biodiversidade e Biotecnologia (PPG-BIONORTE), Universidade Federal do Amapá Campus Universitário, Macapá, AP, 68903-419, Brazil.
Embrapa Amapá, Macapá, AP, 68903-419, Brazil.
Syst Parasitol. 2019 Jun;96(4-5):399-406. doi: 10.1007/s11230-019-09862-y. Epub 2019 May 13.
Ameloblastella amazonica n. sp. (Monogenea: Dactylogyridae) collected on the gills of Pimelodus blochii Valenciennes (Siluriformes: Pimelodidae) from Rivers Acre and Iaco, State of Acre (Brazil) is described. The new species differs from the congeners mainly by the morphology of the dorsal bar, i.e. slightly U-shaped bearing a posteriorly directed flap, arising from the anterior edge of its middle third. The most morphologically similar congeners, A. paranaensis (França, Isaac, Pavanelli & Takemoto, 2003) and A. satoi Monteiro, Kritsky & Brasil-Sato, 2010, resemble A. amazonica n. sp. regarding the general structure of the copulatory complex; however, besides other features, they also differ from the new species because their hooks are similar in size (vs hooks with three different sizes). In addition to the dorsal bar lacking a flap, A. amazonica n. sp. can be differentiated from all congeners based on the combination of the following features: size of hooks (one or two different sizes), shape of the dorsal bar (other than slightly U-shaped), anchor points largely passing the level of superficial root (vs not or slightly passing it), number of MCO rings (other than 3-4) and structure of the articulation between the MCO base and the accessory piece (other than thick, medium-sized, smooth and tubular). Demidospermus leptosynophallus Kritsky & Gutierrez, 1998 and Scleroductus yuncensi Jara & Cone, 1989 were also found infesting P. blochii, both representing new host and locality records.
描述了采自巴西阿克里州阿克里河和亚科河的布洛氏油鲶（鲇形目：油鲶科）鳃上的亚马逊拟成釉器吸虫新种（单殖吸虫：指环虫科）。该新种与同属其他物种的主要区别在于背杆的形态，即略呈U形，带有一个向后的瓣，从其中部前三分之一的前缘生出。形态上最相似的同属物种，巴拉那拟成釉器吸虫（弗朗萨、艾萨克、帕瓦内利和竹本，2003年）和佐藤拟成釉器吸虫（蒙泰罗、克里茨基和巴西-佐藤，2010年），在交配复合体的总体结构上与亚马逊拟成釉器吸虫新种相似；然而，除其他特征外，它们也与新种不同，因为它们的钩大小相似（与之相比，新种的钩有三种不同大小）。除了背杆没有瓣外，亚马逊拟成釉器吸虫新种还可根据以下特征组合与所有同属物种区分开来：钩的大小（一种或两种不同大小）、背杆的形状（不是略呈U形）、锚点大多超过浅根水平（与之相比，其他物种不超过或略超过该水平）、MCO环的数量（不是3 - 4个）以及MCO基部与附属片之间关节的结构（不是厚、中等大小、光滑且呈管状）。还发现1998年的细联睾半精殖吸虫和1989年的云岑硬管吸虫也寄生在布洛氏油鲶上，这两个物种均代表新的宿主和地点记录。
