Horton M A, Whittington I D
Department of Parasitology, University of Queensland, Brisbane, Australia.
J Parasitol. 1994 Dec;80(6):998-1007.
Metabenedeniella parva n. sp. is described from the marine teleost Diagramma pictum from Heron Island, Queensland, Australia. The type species of the genus, Metabenedeniella hoplognathi, is redescribed and the generic diagnosis emended. Metabenedeniella parva differs from M. hoplognathi in many respects: M. parva is smaller; in M. parva the accessory sclerites and anterior hamuli are of similar length, but the posterior hamuli are smaller, whereas in M. hoplognathi the accessory sclerites are longer than the anterior hamuli and the anterior and posterior hamuli are of similar length; in M. parva the anterior hamuli span the distance between accessory sclerites and posterior hamuli and the anterior hamuli overlap the posterior hamuli considerably, but in M. hoplognathi the anterior hamuli partially overlap the posterior hamuli and do not extend anteriorly to reach the accessory sclerites; a sclerite close to the common genital aperture in M. parva is absent from M. hoplognathi. The 2 species differ also in some of their soft body parts. Specimens reported previously from the gills of Plectorhynchus chaetodonoides off Okinawa, Japan as M. hoplognathi are considered to be M. parva. The discovery of M. parva from only the dorsal fin of D. pictum at Heron Island enhances the notion that some benedeniine monogeneans from the body surfaces of fish exhibit strong site specificity.
微小新贝尼登虫（Metabenedeniella parva）新种是从澳大利亚昆士兰州赫伦岛的海洋硬骨鱼图纹棘鳞鱼（Diagramma pictum）中描述的。该属的模式种霍氏新贝尼登虫（Metabenedeniella hoplognathi）被重新描述，属的诊断也得到修订。微小新贝尼登虫在许多方面与霍氏新贝尼登虫不同：微小新贝尼登虫体型较小；在微小新贝尼登虫中，副刚毛和前钩长度相似，但后钩较小，而在霍氏新贝尼登虫中，副刚毛比前钩长，且前钩和后钩长度相似；在微小新贝尼登虫中，前钩跨越副刚毛和后钩之间的距离，且前钩与后钩有相当程度的重叠，但在霍氏新贝尼登虫中，前钩部分重叠后钩，且不向前延伸至副刚毛；微小新贝尼登虫靠近共同生殖孔处有一个刚毛，而霍氏新贝尼登虫没有。这两个物种在一些软体部分也有所不同。之前在日本冲绳附近的栉齿棘鲷（Plectorhynchus chaetodonoides）鳃上报道为霍氏新贝尼登虫的标本被认为是微小新贝尼登虫。在赫伦岛仅从图纹棘鳞鱼的背鳍中发现微小新贝尼登虫，强化了这样一种观念，即来自鱼体表的一些贝尼登科单殖吸虫表现出很强的位点特异性。
