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首页> 外文期刊>Journal of Parasitlolgy >TWO NEW SPECIES OF YORKERIA (TETRAPHYLLIDEA: ONCHOBOTHRIIDAE) FROM CHILOSCYLLIUM PUNCTATUM (ELASMOBRANCHII: HEMISCYLLIIDAE) IN THAILAND
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TWO NEW SPECIES OF YORKERIA (TETRAPHYLLIDEA: ONCHOBOTHRIIDAE) FROM CHILOSCYLLIUM PUNCTATUM (ELASMOBRANCHII: HEMISCYLLIIDAE) IN THAILAND

机译：泰国的点状小球藻（Elasmobranchii：HEMISCYLLIIDAE）的约克氏菌（四环PHY科：甲虫）

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摘要

Two new species of the tapeworm genus Yorkeria are described from the spiral intestine of a specimen of the Brownbanded bambooshark, Chiloscyllium punctatum, collected from a fish market in Bangsarai, Thailand in 1996. The larger of the 2 new tapeworm species, Y. hilli, possesses fewer proglottids, fewer testes, and is smaller than most of its congeners. The smaller of the 2 new species, Y. kelleyae, conspicuously differs from all of its congeners in its possession of medial hooks that are only slightly larger than the lateral hooks (rather than conspicuously larger). Scanning electron microscopy shows both species to possess elongate filitriches on their distal prehook locular surfaces and elongate filitrichs and spinitrichs on their proximal bothridial, distal posthook locular surfaces, pedicels, and cephalic peduncles. In both species, the spinitrichs on the proximal bothridial surfaces, pedicels, and peduncles are very large and readily visible with light microscopy. Whereas the spinitrichs on these 4 surfaces are bluntly rounded in Y. hilli, they are pointed in Y. kelleyae. Examination of specimens identified as Y. parva, collected by several previous workers from a diversity of hosts and localities, calls into question the conspecificity of at least some of this material. The unusual scolex form suggests that the configuration of the cerebral ganglionic mass in species of Yorkeria may differ from that seen in most other tetraphyllidean taxa.
机译：从1996年从泰国的Bangsarai的一个鱼市场中采集的棕带竹鲨标本Chiloscyllium punctatum的螺旋肠中描述了described虫属的两个新种。两种2虫中的较大者Y. hilli比其他大多数同类动物拥有更少的前睾丸，更少的睾丸并且更小。这两个新种中的较小的一种，是耶尔酵母菌，它与所有同类动物的不同之处在于，它们的内侧钩子只比外侧钩子大一点（而不是明显大于外侧钩子）。扫描电子显微镜显示，这两个物种在其钩前远侧眼表面上均具有细长的纤毛，并且在其近侧的ridrid，钩后远侧眼表面，花梗和头状花序上均具有细长的纤毛和棘突。在这两个物种中，近端两栖表面，花梗和花序梗上的刺状棘突非常大，并且在光学显微镜下很容易看到。在这四个表面上的刺状棘刺在丘陵耶尔森氏菌中被钝化成圆形，而它们在耶氏耶尔森氏菌中被指出。由以前的几位工人从不同的寄主和地区收集的标本为Y. parva的标本的检查使人们对至少某些这种材料的专一性提出了质疑。异常的尾骨形态表明，约克氏菌物种中脑神经节团的构型可能与大多数其他四叶类群中所见的构型不同。

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    《Journal of Parasitlolgy》 |2002年第6期|p.1172-1180|共9页
  • 作者

    J. N. Caira and Randall Tracy;

  • 作者单位

    Department of Ecology & Evolutionary Biology, University of Connecticut, Storrs, Connecticut 06269-3043. jcaira@uconnvm.uconn.edu;

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