In the present study, pentastomids belonging to the order Cephalobaenida were isolated from the lungs of Berber skinks Eumeces schneideri (Famiy: Scincidae), which were morphologically described by light and scanning electron microscopy and taxonomically justified by 18s rDNA molecular analyses of the parasites. Seventeen host specimens were collected from well–vegetated wadis at high altitudes, Jizan, Saudi Arabia as new type locality; twelve specimens (70.59%) were infected. All of the recovered parasites were adults, possessed small broadly triangular cephalothorax flattened on the ventral surface and merged smoothly with a uniformly thick and squat abdomen and terminated in a pair of divergent lobes. The results obtained indicated that the parasites belong to the sharp–tipped posterior–hook Raillietiella spp. distinguished from other raillietiedids of the same group some important characteristic features including annulus number, shape and dimensions of the buccal cadre, copulatory spicules, and anterior and posterior hooks. The anterior hook of the female specimens (n = 5) had a blade length (AB) of 135 ± 5 (110–146) μm and shank length (BC) 158 ± 5 (150–169) μm while the posterior hook was much larger with AB measuring 221 ± 5 (200–236) μm and BC 286 ± 6 (280–289) μm. For the male specimens (n = 5), the anterior hook had an AB of 73 ± 3 (72–75) μm and a BC 102 ± 5 (100–103) μm. The posterior hook was much larger with AB 190.6 ± 5 (190–191) μm and BC 221 ± 5 (280–289) μm. The morphological characterization of the recovered parasites was closely similar to R. aegypti previously isolated from the same host. Sequence alignment by the maximum likelihood analysis for the data obtained from the 18S rDNA analysis of the parasites exhibits identities ranging between 88–95% with pentastomid genera recovered from the GenBank. The phylogenetic tree supported the inclusion of the parasites within the monophyletic Pentastomida clade with maximum identity to the raillietiellid species. The recovered sequences from the present study were deposited in GenBank under Accession number MK970649.1. The present molecular analysis was the first to confirm the taxonomic position of R. aegypti isolated from the host examined.

在本研究中，从柏柏尔石龙子 Eumeces schneideri的肺中分离出属于 Cephalobaenida 目的五口虫（科：Scincidae），通过光学和扫描电子显微镜对其进行形态学描述，并通过寄生虫的 18s rDNA 分子分析在分类学上证明是合理的。17个寄主标本采集于高海拔植被良好的干谷，沙特阿拉伯吉赞作为新型产地；十二个标本（70.59%）被感染。所有回收的寄生虫都是成虫，在腹面有扁平的小而宽的三角形头胸部，平滑合并，腹部均匀厚实，下蹲，末端为一对发散的叶。获得的结果表明寄生虫属于尖尖的后钩Raillietiella属 区别于同一组的其他raillietiedids的一些重要特征，包括环数，颊骨的形状和尺寸，交配针，以及前后钩。女性标本（n  =  5）的前钩的刀片长度（AB）为135  ±  5（110-146）μm和柄长（BC）158  ±  5（150-169）μm而后钩很多AB 为 221  ±  5 (200–236) μm，BC 为 286  ±  6 (280–289) μm。对于男性标本 (n  =  5)，前钩的 AB 为 73  ±  3 (72–75) μm，BC 为 102  ±  5 (100–103) μm。后钩更大，AB 190.6  ± 5 (190–191) μm 和 BC 221  ±  5 (280–289) μm。回收的寄生虫的形态特征与先前从同一宿主中分离出的埃及疟原虫非常相似。通过对寄生虫的 18S rDNA 分析获得的数据进行最大似然分析的序列比对显示，与从 GenBank 中回收的五口虫属的同一性在 88-95% 之间。系统发育树支持将寄生虫包含在具有最大同一性的单系 Pentastomida 进化枝中。从本研究中恢复的序列以登录号 MK970649.1 存放在 GenBank 中。目前的分子分析是第一个确认了埃及罗非鱼的分类位置 与受检者隔离。