Vaughan David B, Christison Kevin W, Hansen Haakon, Shinn Andrew P
Aquatic Animal Health Research, Two Oceans Aquarium, P.O. Box 50603, Victoria & Alfred Waterfront, Cape Town, 8000, South Africa.
Folia Parasitol (Praha). 2010 Mar;57(1):11-5. doi: 10.14411/fp.2010.002.
Gyrodactylus eyipayipi sp. n. is described from the skin, gills, flute and male brood pouch of captive specimens of the greater pipefish Syngnathus acus L., collected for and maintained at the Two Oceans Aquarium in Cape Town, South Africa. It is the first marine Gyrodactylus species reported from the African continent. The new species is compared to the three known Gyrodactylus species affecting syngnathiform hosts (G. pisculentus Williams, Kritsky, Dunnigan, Lash et Klein, 2008, G. shorti Holliman, 1963, and G. syngnathi Appleby, 1996). Although all four species have similar-sized and shaped attachment hooks with some overlap, separation of the species is possible using marginal hook morphology. The marginal hooks of G. eyipayipi measure (mean) 30 pm in total length and are larger than those of the three other species (mean, 24-28 tm). Gyrodactylus eyipayipi can also be discriminated based on differences in the shape of the marginal hook sickle notably by its long sickle point which extends far beyond the toe, its blunt rounded toe and, by the approximate rectangular shape to the base of the sickle. By comparison, the sloping toe regions of G. pisculentus and G. syngnathi give the sickle bases an approximately triangular shape, whilst the short sickle point and open aperture to the sickles of G. shorti allow for their discrimination from G. eyipayipi.
艾氏三代虫（Gyrodactylus eyipayipi）新种是从南非开普敦双洋水族馆饲养的大海龙（Syngnathus acus L.）标本的皮肤、鳃、笛骨和雄性育儿袋中描述的。这是从非洲大陆报道的首个海洋三代虫物种。将该新物种与已知的三种感染海龙目宿主的三代虫物种（2008年的威廉姆斯三代虫（G. pisculentus Williams, Kritsky, Dunnigan, Lash et Klein）、1963年的肖氏三代虫（G. shorti Holliman）和1996年的海龙三代虫（G. syngnathi Appleby））进行了比较。尽管所有四个物种的附着钩大小和形状相似，存在一些重叠，但利用边缘钩形态可以区分这些物种。艾氏三代虫的边缘钩全长（平均值）为30微米，比其他三个物种的边缘钩（平均值为24 - 28微米）更大。艾氏三代虫还可以根据边缘钩镰刀形状的差异来区分，特别是其长镰刀尖远远超出趾部、钝圆的趾部以及镰刀基部近似矩形的形状。相比之下，威廉姆斯三代虫和海龙三代虫倾斜的趾部区域使镰刀基部呈近似三角形，而肖氏三代虫镰刀的短镰刀尖和开口则使其与艾氏三代虫得以区分。
