PDF(Pubmed)
Abstract：
The morphological characterisation of Diplozoidae spp. is highly reliant on the details of the sclerotised components of the hooks and clamps in the haptor. Only six species of Paradiplozoon (Diplozoinae) have been described from Africa, four of which have adequate morphological and even comparative ITS2 rDNA data available. However, the descriptions of Paradiplozoon ghanense (Thomas, 1957) and Paradiplozoon aegyptense (Fischthal & Kuntz, 1963) lack essential taxonomic information, specifically the details for their haptoral sclerites. As such, all available material from museum collections for these two species were studied using light microscopy to supplement the original morphometric descriptions. The holotype and paratypes of P. aegyptense were studied, but only voucher material for P. ghanense could be sourced. However, this voucher material for P. ghanense was deposited by the species authority and bore a striking resemblance to the illustrations and collection details from the original description. They were thus identified as the type series for the taxon, with a lectotype and paralectotype designated. Both P. ghanense and P. aegyptense could be readily distinguished from other taxa based on the supplementary data generated here, supporting their distinctness. The haptoral sclerites of P. aegyptense were most similar to those of Paradiplozoon krugerense Dos Santos & Avenant-Oldewage, 2016, also described from Labeo spp., while the sclerites of P. ghanense were most similar to Paradiplozoon bingolense Civáňová, Koyun & Koubková, 2013 and Paradiplozoon iraqense Al-Nasiri & Balbuena, 2016. Additionally, a voucher of P. aegyptense collected from the alestid type host of P. ghanense was reidentified as the latter species here. This greatly simplified the known host specificity for Paradiplozoon spp. in Africa, with P. aegyptense now exclusively reported from Cypriniformes (Cyprinidae and Danionidae), and P. ghanense restricted to Characiformes (Alestidae). The occurrence of all diplozoids from non-cyprinoid hosts was also investigated and several records of diplozoids occurring on non-cyprinoid hosts were collated and scrutinised. Excluding the two instances of diplozoids described and exclusively occurring on Characiformes fishes (P. ghanense and Paradiplozoon tetragonopterini (Sterba, 1957)), most other non-cyprinoid collections appear sporadic and unsubstantiated, but warrant further investigation supported by diligent taxonomic data. Even though the morphometric descriptions of both P. ghanense and P. aegyptense were fully reported on here, additional material will be needed to study their genetic profiles and phylogeny.
摘要：
二倍体科的形态特征。高度依赖于haptor中钩子和夹子的硬化部件的细节。非洲仅描述了六种Paradiplozoon（Diplozoinae），其中四个有足够的形态学和甚至比较ITS2rDNA数据。然而,对Paradiplozoonghanense的描述(托马斯，1957年)和埃及Paradiplozoon(Fischthal&Kuntz，1963)缺乏必要的分类学信息，特别是他们的硬化剂的细节。因此，使用光学显微镜研究了博物馆收藏中这两个物种的所有可用材料，以补充原始的形态计量学描述。研究了埃及假单胞菌的整型和同型，但只能采购P.ghanense的凭证材料。然而,该凭证材料是由物种管理局存放的，与原始描述中的插图和收藏细节非常相似。因此，它们被确定为分类单元的类型系列，具有指定的选型和平行型。根据此处生成的补充数据，可以很容易地将P.ghanense和P.aegyptentn与其他分类群区分开来，支持他们的独特性。埃及斑马的硬岩与ParadiplozoonkrugerenseDosSantos和Acutor-Oldewage的硬岩最相似，2016年，也来自Labeospp。,而P.ghanense的巩膜与ParadiplozoonbingolenseCivisáová最相似，Koyun&Koubková,2013年和ParadiplozooniraqenseAl-Nasiri&Balbuena，2016年。此外,从P.ghanense的alestid型宿主中收集的P.aegyptent的凭证在这里被重新识别为后者。这大大简化了Paradiplozoonspp的已知宿主特异性。在非洲,现在只报告来自Cypriniformes（Cyprinidae和Danionidae），和P.ghanense限于Characiformes（a）。还调查了非Cyprinoid宿主中所有二倍体的发生，并整理并仔细检查了非Cyprinoid宿主上发生的二倍体的一些记录。不包括在Characiformes鱼类上描述的和仅发生的二倍体类动物的两个实例（P.ghanenseandParadiplozoontetragonopterini(Sterba，1957)),大多数其他非鲤科动物集合似乎是零星的和未经证实的，但需要在勤奋的分类数据支持下进行进一步的调查。尽管在这里充分报道了对P.ghanense和P.aegyptent的形态描述，需要额外的材料来研究他们的遗传概况和系统发育。
