PDF(Pubmed)
Abstract：
Hemiurid digeneans conspecific with Stomachicola muraenesocis Yamaguti, 1934 (the type species of the genus Stomachicola Yamaguti, 1934) were collected from the stomach of the daggertooth pike conger Muraenesox cinereus (Forsskål) off the Persian Gulf of Iran. This study aimed to provide a detailed characterization of Stom. muraenesocis, including measurements, illustrations and scanning electron microscopy (s.e.m.) representations. Comparisons with the original and previous descriptions revealed morphological and metrical variations in several features (i.e. body size and shape, arrangement of reproductive organs, soma to ecsoma length ratio, position of genital opening, number of vitelline tubules and extension of uterine coils) between Stom. muraenesocis from different hosts and localities. This study presents the first molecular sequence data associated with the small (18S) and large (28S) subunit nuclear ribosomal RNA genes (rDNA) for Stom. muraenesocis. Phylogenetic analyses of the 18S dataset placed Stom. muraenesocis as sister lineage to a clade formed of a group of species of Lecithaster Lühe, 1901 (Lecithasteridae Odhner, 1905). In contrast, phylogenetic analyses based on the 28S consistently recovered a sister relationship between Stom. muraenesocis and representatives of the Hemiuridae Looss, 1899. Further comprehensive phylogenetically based classification in light of morphology and taxonomic history of the Hemiuridae and Lecithasteridae is required to infer phylogenetic affinities and historical biogeography of Stomachicola. A comprehensive list of previously reported species of Stomachicola together with their associated hosts, localities and morphometric data is provided.
摘要：
半球形异系人与山竹属植物相关，1934年（StomachicolaYamaguti属的类型物种，1934年）是从伊朗波斯湾附近的daggertoothpikepikecongerMuraenesoxcinereus（Forsskäl）的胃中收集的。本研究旨在提供一个详细的描述。muraenesocis,包括测量，插图和扫描电子显微镜（s.e.m.）表示。与原始描述和先前描述的比较显示了几种特征的形态和度量变化（即身体大小和形状，生殖器官的排列，躯体与子宫内膜长度比，生殖器开口的位置，卵黄小管的数量和子宫线圈的延伸）。muraenesocis来自不同的主机和地区。这项研究提供了与Stom的小（18S）和大（28S）亚基核核糖体RNA基因（rDNA）相关的第一个分子序列数据。Muraenesocis.18S数据集的系统发育分析放置了Stom。muraenesocis是由一组LecithasterLühe物种组成的进化枝的姐妹血统，1901年（LecithasteridaeOdhner，1905).相比之下,基于28S的系统发育分析始终恢复了Stom之间的姐妹关系。muraenesocis和半尿科Looss的代表，1899.根据Hemiuridae和Lecithasteridae的形态和分类学历史，需要进一步进行基于系统发育的综合分类，以推断Stomachicola的系统发育亲和力和历史生物地理学。先前报道的Stomachicola物种及其相关宿主的完整列表，提供了位置和形态测量数据。
