Nowak Małgorzata R, Królaczyk Katarzyna, Kavetska Katarzyna M, Pilarczyk Bogumiła
Laboratory of Biology and Ecology of Parasites, 20 Judyma Street, West Pomeranian University of Technology, 71-466 Szczecin, Poland.
Wiad Parazytol. 2011;57(1):31-6.
The tapeworm species Cloacotaenia megalops (Nitzsch in Creplin, 1829) is characterized by a very specific morphology. A particularly distinct feature is a large almost square scolex in which four fleshy suction cups are embedded and a rudimentary rostellum. During standard studies of wild duck cestode fauna in northwestern Poland, some morphological differences were observed among specimens, mainly in the shape of scolices and hermaphroditic proglottids of C. megalops isolated from different bird species. This paper attempts to demonstrate the impact of the host species on morphology of the parasite. The study material consisted of 39 individuals of C. megalops (19 from Aythya fuligula, 10 from Anas platyrhynchos, 4 from Bucephala clangula, 4 from Aythya marila and 2 from A. ferina). The isolated parasites were fixed and stored in 70% ethanol and solid preparations were made. Selected external and internal structures of the parasite were measured and photographed using a Zeiss microscope, a microscope camera Opta Tech 2.1 and Opta View 6.0.2.2. It was stated that the sizes of the most important elements of the parasite morphology are generally consistent with those presented in the available literature, nevertheless some differences were observed in both morphology and sizes of some anatomical structures, especially in the form of scolices and hermaphroditic proglottids between specimens isolated from hosts representing three different eco-tribes (Aythyini, Anatini and Mergini).
绦虫物种巨口阴肛绦虫（Nitzsch于1829年在Creplin中描述）具有非常独特的形态特征。一个特别明显的特征是一个几乎呈方形的大的头节，其中嵌入了四个肉质吸盘和一个退化的吻突。在对波兰西北部野鸭绦虫动物群的标准研究中，在标本中观察到了一些形态差异，主要是从不同鸟类物种分离出的巨口阴肛绦虫的头节和雌雄同体节片的形状。本文试图证明宿主物种对寄生虫形态的影响。研究材料包括39条巨口阴肛绦虫个体（19条来自小潜鸭，10条来自绿头鸭，4条来自鹊鸭，4条来自斑背潜鸭，2条来自赤颈鸭）。分离出的寄生虫被固定并保存在70%乙醇中，并制作了固体标本。使用蔡司显微镜、Opta Tech 2.1显微镜相机和Opta View 6.0.2.2对寄生虫的选定外部和内部结构进行了测量和拍照。结果表明，寄生虫形态最重要元素的大小通常与现有文献中呈现的一致，然而，在一些解剖结构的形态和大小方面观察到了一些差异，特别是在从代表三个不同生态族（潜鸭族、鸭族和海番鸭族）的宿主分离出的标本之间，头节和雌雄同体节片的形态存在差异。
