Marie Amandine D, Justine Jean-Lou
Equipe Biogéographie Marine Tropicale, Unité Systématique, Adaptation, Evolution (CNRS, UPMC, MNHN, IRD), Institut de Recherche pour le Développement, BP A5, 98848, Nouméa Cedex, Nouvelle Calédonie.
Syst Parasitol. 2006 May;64(1):47-55. doi: 10.1007/s11230-005-9017-3. Epub 2006 Apr 13.
Thaumatocotyle pseudodasybatis Hargis, 1955, has previously been described from Aetobatus narinari in the Atlantic and subsequently recorded from the Pacific. Aetobatus cf. narinari is now considered a species complex; as monocotylids are often strictly species specific, we test the hypothesis that detailed examination of specimens of monocotylids from rays from various localities could reveal morphological differences and eventually help our understanding of the systematics of the host. T. pseudodasybatis, previously known from seven specimens only, is redescribed from an additional 26 specimens from the South Pacific (off New Caledonia, Australia and Ranguiroa, French Polynesia), all from Aetobatus cf. narinari. The female reproductive organs are described in detail. The distal extremity of the male sclerotised copulatory organ, described in detail for the first time, shows a characteristic pattern of longitudinal striations on its edge that might be useful for future distinction from other species. The development of the male and female organs in juveniles is described, showing that growth of the male sclerotised copulatory organ begins with its basal part and precedes development of the ejaculatory bulb. Specimens from New Caledonia, Australia and French Polynesia had similar measurements and morphology, especially in the shape of the distal end of the male sclerotised copulatory organ; they were also similar to the holotype from the Atlantic. This suggests that all specimens from the Pacific and Atlantic belong to a single species; T. pseudodasybatis thus cannot be used to differentiate populations of Aetobatus cf. narinari, perhaps because this monocotylid is not strictly species-specific.
奇异杯叶吸虫（Thaumatocotyle pseudodasybatis）于1955年由哈吉斯首次描述，最初发现于大西洋的纳氏鹞鲼（Aetobatus narinari），随后在太平洋也有记录。现认为纳氏鹞鲼是一个物种复合体；由于单殖吸虫通常具有严格的宿主特异性，我们检验了这样一个假说：对来自不同地区鳐类的单殖吸虫标本进行详细检查，可能会揭示形态差异，并最终有助于我们理解宿主的系统分类。奇异杯叶吸虫此前仅依据7个标本被描述过，现根据从南太平洋（新喀里多尼亚、澳大利亚海域以及法属波利尼西亚的朗伊罗阿岛）采集的另外26个标本进行重新描述，所有标本均来自纳氏鹞鲼复合体（Aetobatus cf. narinari）。详细描述了雌性生殖器官。首次详细描述了雄性硬化交配器官的远端，其边缘呈现出独特的纵向条纹模式，这可能有助于未来与其他物种进行区分。描述了幼体中雄性和雌性器官的发育情况，表明雄性硬化交配器官的生长始于基部，先于射精球的发育。来自新喀里多尼亚、澳大利亚和法属波利尼西亚的标本在测量数据和形态上相似，尤其是雄性硬化交配器官远端的形状；它们也与来自大西洋的模式标本相似。这表明来自太平洋和大西洋的所有标本都属于同一个物种；因此，奇异杯叶吸虫不能用于区分纳氏鹞鲼复合体的不同种群，可能是因为这种单殖吸虫并非严格的宿主特异性。
