Deveney Marty R, Whittington Ian D
SARDI Aquatic Sciences, South Australian Research and Development Institute, P.O. Box 120, Henley Beach, South Australia 5022, Australia.
Folia Parasitol (Praha). 2011 Nov;58(4):257-72. doi: 10.14411/fp.2011.025.
Dioncopseudobenedenia Yamaguti, 1965 (Monogenea: Capsalidae) is redefined. Dioncopseudobenedenia kala Yamaguti, 1965 (type species) is redescribed from type material from Hawaii and from new specimens from Heron Island, Queensland, Australia and New Caledonia. We made detailed observations on D. macracantha Yamaguti, 1968 from type material from Hawaii, and from new material from Heron Island and New Caledonia. Dioncopseudobenedenia ancoralis sp. n. is described from the gill chamber of Siganus lineatus (Valenciennes) from Green Island and Heron Island, Australia and from New Caledonia. This study confirms that only one pair of large central sclerites is present on the haptor in Dioncopseudobenedenia species. The male copulatory organ in species of Dioncopseudobenedenia is a penis contained in a fluid-filled space (= penis canal) with weakly muscular walls. Dioncopseudobenedenia kala and D. ancoralis bear a sclerite at the tip of the penis. In D. macracantha, the structure of the penis, which has no terminal sclerite, indicates it may combine the functions of a penis and a cirrus. Dioncopseudobenedenia is compared with Calicobenedenia Kritsky et Fennessy, 1999, the other capsalid genus with a single pair of large sclerites on the haptor. The large haptoral sclerites in species of Dioncopseudobenedenia resemble accessory sclerites, whereas those of C. polyprioni Kritsky et Fennessy, 1999 resemble hamuli. Observations of oncomiracidia confirmed that the large haptoral sclerites in D. kala are accessory sclerites. Haptoral morphology suggests that different Dioncopseudobenedenia spp. employ different means of attachment. Mating behaviour was observed twice between two different pairs of D. kala specimens from Heron Island. Two preserved specimens from Nouméa, New Caledonia had structures near the dorsal vaginal pore that we interpret as spermatophores. This is the first report of spermatophores in a capsalid inhabiting the gill chamber. The geographic distribution of Dioncopseudobenedenia spp. is discussed.
重新定义了1965年的山古蒂拟狄氏吸虫（Dioncopseudobenedenia Yamaguti，单殖吸虫纲：锚首虫科）。依据来自夏威夷的模式标本以及来自澳大利亚昆士兰赫伦岛和新喀里多尼亚的新标本，重新描述了1965年的卡拉拟狄氏吸虫（Dioncopseudobenedenia kala Yamaguti，模式种）。我们依据来自夏威夷的模式标本以及来自赫伦岛和新喀里多尼亚的新材料，对1968年的大棘拟狄氏吸虫（D. macracantha Yamaguti）进行了详细观察。从澳大利亚绿岛和赫伦岛以及新喀里多尼亚的条纹篮子鱼（Siganus lineatus，瓦朗谢讷）鳃腔中描述了新种锚状拟狄氏吸虫（Dioncopseudobenedenia ancoralis sp. n.）。本研究证实，拟狄氏吸虫属物种的抱器上仅存在一对大型中央硬化体。拟狄氏吸虫属物种的雄性交配器官是一个位于充满液体的空间（=阴茎管）内的阴茎，其壁肌肉薄弱。卡拉拟狄氏吸虫和锚状拟狄氏吸虫在阴茎顶端有一个硬化体。在大棘拟狄氏吸虫中，没有末端硬化体的阴茎结构表明它可能兼具阴茎和触须的功能。将拟狄氏吸虫与1999年的卡里科贝内登吸虫（Calicobenedenia Kritsky et Fennessy）进行了比较，后者是另一个在抱器上有一对大型硬化体的锚首虫科属。拟狄氏吸虫属物种的大型抱器硬化体类似于辅助硬化体，而1999年的多普里翁卡里科贝内登吸虫（C. polyprioni Kritsky et Fennessy）的大型抱器硬化体类似于小钩。对纤毛幼虫的观察证实，卡拉拟狄氏吸虫的大型抱器硬化体是辅助硬化体。抱器形态表明不同的拟狄氏吸虫物种采用不同的附着方式。在来自赫伦岛的两对不同的卡拉拟狄氏吸虫标本之间观察到了两次交配行为。来自新喀里多尼亚努美阿的两个保存标本在背侧阴道孔附近有一些结构，我们将其解释为精荚。这是关于栖息在鳃腔中的锚首虫科吸虫精荚的首次报道。讨论了拟狄氏吸虫属物种的地理分布。
