Fyler C A, Caira J N
Department of Ecology and Evolutionary Biology, University of Connecticut, Storrs, Connecticut 06269, USA.
J Parasitol. 2006 Feb;92(1):105-25. doi: 10.1645/GE-3522.1.
Five new species of Acanthobothrium (Tetraphyllidea: Onchobothriidae) are described from the spiral intestine of the Freshwater whipray, Himantura chaophraya, in the Kinabatangan River in Malaysian Borneo. Based on criteria set forth in a previous categorization scheme for species of Acanthobothrium, these consist of 3 Category 1 species, Acanthobothrium asnihae n. sp., Acanthobothrium saliki n. sp., and Acanthobothrium zainali n. sp.; a Category 8 species, Acanthobothrium etini n. sp.; and a Category 2 species, Acanthobothrium masnihae n. sp.. Acanthobothrium asnihae n. sp. differs from all Category 1 species in its possession of a horizontal band of weak musculature that divides the posterior loculus in half. Among Category 1 species, A. saliki n. sp. differs from all but Acanthobothrium southwelli in its possession of postovarian testes. It differs from A. southwelli in its possession of fewer testes and a greater number of proglottids. Acanthobothrium zainali n. sp. differs from the 25 other Category 1 species in a combination of overall size, muscular pad and hook shape, arrangement and number of testes, ovary configuration in cross section, position of ovarian isthmus, and genital pore position. Acanthobothrium etini n. sp. is distinguished from all 5 other Category 8 species in its lack of testes from the proglottid antiporal and postporal regions and in testis number. Acanthobothrium masnihae n. sp. differs from the 35 other Category 2 species in its possession of fewer testes, postporal testes, or a greater number of proglottids. A key to Acanthobothrium species parasitizing H. chayophraya is presented. This represents the first report of Acanthobothrium from freshwater stingrays belonging to a family other than the Potamotrygonidae.
从马来西亚婆罗洲基纳巴唐岸河的淡水黄貂鱼（Himantura chaophraya）螺旋肠中描述了5种新的棘头双叶绦虫（四叶目：钩双叶科）。根据先前针对棘头双叶绦虫物种的分类方案中规定的标准，这些新物种包括3种1类物种，即阿斯尼哈棘头双叶绦虫（Acanthobothrium asnihae n. sp.）、萨利基棘头双叶绦虫（Acanthobothrium saliki n. sp.）和扎伊纳利棘头双叶绦虫（Acanthobothrium zainali n. sp.）；1种8类物种，即埃蒂尼棘头双叶绦虫（Acanthobothrium etini n. sp.）；以及1种2类物种，即马斯尼哈棘头双叶绦虫（Acanthobothrium masnihae n. sp.）。阿斯尼哈棘头双叶绦虫与所有1类物种的不同之处在于，它有一条水平的弱肌肉带，将后腔分成两半。在1类物种中，萨利基棘头双叶绦虫与除南韦尔棘头双叶绦虫（Acanthobothrium southwelli）外的所有其他物种的不同之处在于它有卵巢后睾丸。它与南韦尔棘头双叶绦虫的不同之处在于它的睾丸数量较少，节片数量较多。扎伊纳利棘头双叶绦虫在总体大小、肌肉垫和钩的形状、睾丸的排列和数量、卵巢横切面形态、卵巢峡部位置以及生殖孔位置等方面的组合与其他25种1类物种不同。埃蒂尼棘头双叶绦虫与其他5种8类物种的区别在于，它在节片反口侧和口侧区域没有睾丸，且睾丸数量不同。马斯尼哈棘头双叶绦虫与其他35种2类物种的不同之处在于它的睾丸数量较少、有口侧睾丸或节片数量较多。给出了寄生在查氏黄貂鱼上的棘头双叶绦虫物种检索表。这是关于淡水黄貂鱼体内棘头双叶绦虫的首次报道，该淡水黄貂鱼属于除河魟科以外的一个科。
