首页> 外文期刊>Journal of Parasitology >A NEW SPECIES OF ACANTHOBOTHRIUM (CESTODA: TETRAPHYLLIDEA: ONCHOBOTHRIIDAE) FROM THE OCELLATE RIVER STINGRAY, POTAMOTRYGON MOTORO (CHONDRICHTHYES: POTAMOTRYGONIDAE), IN ARGENTINA
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A NEW SPECIES OF ACANTHOBOTHRIUM (CESTODA: TETRAPHYLLIDEA: ONCHOBOTHRIIDAE) FROM THE OCELLATE RIVER STINGRAY, POTAMOTRYGON MOTORO (CHONDRICHTHYES: POTAMOTRYGONIDAE), IN ARGENTINA

机译:来自阿根廷的卵形河黄TING(POTAMOTRYGON MOTORO)(软骨动物:POTAMOTRYGONIDAE)的一种新的乙类杆菌(CES属:四环LL科:甲虫)

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摘要

Examination of the spiral intestines of 44 freshwater stingrays, Potamotrygon motoro, from tributary rivers of the Paraná River in Argentina, allowed for the collection of specimens of an undescribed species of Acanthobothrium. Acanthobothrium ramiroi n. sp. can be distinguished from all other congeners by the combination of the following characters: asymmetrical hooks (medial and lateral hooks conspicuously different in size and form, with axial prong of medial hooks stouter than abaxial prong), hook size (total length of medial hooks up to 242 μm, total length of lateral hooks up to 239 μm), bothridia not fused to the scolex proper at posterior ends, worm size (51–84 mm long), and the presence of a conspicuous vaginal sphincter. The new species is different from all other species of Acanthobothrium in freshwater potamotrygonids, except Acanthobothrium terezae, in having conspicuous asymmetrical hooks. The main differences that allow for the distinction between A. ramiroi and A. terezae include hook size, the way the bothridia are attached to the scolex proper, and the shape of the older gravid segments. The discovery of a new species of Acanthobothrium from a potamotrygonid extends our understanding of the diversity of the genus in freshwater stingrays in South America.
机译:检查了来自阿根廷巴拉那河的支流的44头淡水黄貂鱼(Potamotrygon motoro)的螺旋肠,从而收集了未描述种类的棘皮thr的标本。棘皮棘孢杆菌sp。可以通过以下特征的组合与所有其他同类产品区分开:不对称的钩子(内侧和外侧的钩子的大小和形式明显不同,内侧钩子的轴向叉头比背面的叉头要硬),钩子的大小(内侧钩子的总长)到242μm,侧钩总长度最大为239μm),两个虹膜未在尾端融合到股骨上,虫体大小(长51–84 mm),并且存在明显的阴道括约肌。新物种不同于淡水壶角龙科中的所有其他物种的棘皮thr,除了特有的棘皮thr,它们具有明显的不对称钩。允许区分拉美罗非鱼和特雷莎菌的主要区别包括钩子的大小,球根虫附着在趾骨上的方式以及较老的妊娠段的形状。从角锥虫中发现了新的棘皮can属物种,这扩展了我们对南美淡水黄貂鱼属多样性的理解。

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  • 来源
    《Journal of Parasitology》 |2005年第2期|p.00000390-00000396|共7页
  • 作者

    Verónica A. Ivanov*;

  • 作者单位

    Laboratorio de Helmintología, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, piso 4, Lab. 52. C1428EHA, Buenos Aires, Argentina. ivanov@bg.fcen.uba.ar*Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina;

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