Haseli Mohammad, Zare Bazghalee Monireh, Palm Harry W
Department of Biology, Faculty of Sciences, University of Guilan, Rasht, Iran.
Department of Biology, Faculty of Sciences, University of Guilan, Rasht, Iran.
Parasitol Int. 2017 Dec;66(6):761-772. doi: 10.1016/j.parint.2017.07.007. Epub 2017 Jul 31.
The examination of the two batoid species, Pastinachus sephen (Forsskål) and Himantura gerrardi (Gray), resulted in a morphologic identification of the five eutetrarhynchid species, namely Parachristianella indonesiensis Palm, 2004 reported for the first time from Himantura gerrardi, Pa. monomegacantha Kruse, 1959, Prochristianella clarkeae Beveridge, 1990, Pr. butlerae Beveridge, 1990 and Dollfusiella spinulifera (Beveridge et Jones, 2000). By sequencing the partial 28S rDNA and calculating the genetic distances between the morphologically identified specimens from the Persian Gulf and their allopatric morphological conspecifics as well as using a phylogeny, the specimens of the Persian Gulf were considered as the allopatric conspecifics of Parachristianella indonesiensis, Pa. monomegacantha and Prochristianella clarkeae. Since the specimens of Dollfusiella from the Persian Gulf and D. spinulifera from Australia had a high genetic distance and placed in two separate clades, the Iranian specimens of Dollfusiella were treated as the cryptic species of D. spinulifera. Following the treatment of Prochristianella macracantha Palm, 2004 as the synonym of Pr. butlerae Beveridge, 1990, it was also expressed that although Pr. butlerae appeared to be a variable species in terms of its metric data, there was an identical oncotaxy in all the conspecifics. A detail examination of the specimens from the Persian Gulf as well as Australian voucher specimens revealed a great intraindividual and intraspecific variability in this species. Since, the sequence information is only available for the Iranian specimens and there is no possibility to evaluate the genetic distance and their monophyly, we consider these two allopatric populations as one species.
对两种魟类物种，即尖吻魟（Pastinachus sephen，福斯科尔）和杰氏魟（Himantura gerrardi，格雷）进行的检查，从形态学上鉴定出了5种真四吻魟科物种，即首次从杰氏魟中报道的印度尼西亚副克里斯蒂魟（Parachristianella indonesiensis，帕尔姆，2004年）、单巨棘副克里斯蒂魟（Pa. monomegacantha，克鲁泽，1959年）、克拉克氏原克里斯蒂魟（Prochristianella clarkeae，贝弗里奇，1990年）、巴特勒氏原克里斯蒂魟（Pr. butlerae，贝弗里奇，1990年）和具刺多尔夫魟（Dollfusiella spinulifera，贝弗里奇和琼斯，2000年）。通过对部分28S rDNA进行测序，并计算来自波斯湾的形态学鉴定标本与其异域形态学同种标本之间的遗传距离，以及利用系统发育分析，波斯湾的标本被认为是印度尼西亚副克里斯蒂魟、单巨棘副克里斯蒂魟和克拉克氏原克里斯蒂魟的异域同种。由于来自波斯湾的多尔夫魟标本与来自澳大利亚的具刺多尔夫魟有很高的遗传距离，并处于两个不同的分支中，伊朗的多尔夫魟标本被视为具刺多尔夫魟的隐存种。在将2004年的大棘原克里斯蒂魟（Prochristianella macracantha，帕尔姆）视为1990年的巴特勒氏原克里斯蒂魟的同义词后，还表明，尽管巴特勒氏原克里斯蒂魟在其测量数据方面似乎是一个可变物种，但所有同种个体的瘤序相同。对来自波斯湾的标本以及澳大利亚凭证标本的详细检查揭示了该物种在个体内和种内存在很大的变异性。由于仅获得了伊朗标本的序列信息，且无法评估其遗传距离和单系性，我们将这两个异域种群视为一个物种。
