Teixeira Marcos A L, Fourreau Chloé Julie Loïs, Sempere-Valverde Juan, Carvalho Susana
Biological and Environmental Science and Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
Molecular Invertebrate Systematics and Ecology (MISE) Lab, Graduate School of Engineering and Science, University of the Ryukyus, Nishihara, Okinawa, Japan.
Zookeys. 2024 Apr 1;1196:331-354. doi: 10.3897/zookeys.1196.115260. eCollection 2024.
Annelid biodiversity studies in the Red Sea are limited and integrative taxonomy is needed to accurately improve reference libraries in the region. As part of the bioblitz effort in Saudi Arabia to assess the invertebrate biodiversity in the northern Red Sea and Gulf of Aqaba, specimens from intertidal marine and lagoon-like rocky environments were selected for an independent assessment, given the known taxonomic ambiguities in this genus. This study used an integrative approach, combining molecular with morphological and geographic data. Our results demonstrate that specimens found mainly in the Gulf of Aqaba are not only morphologically different from other five similar Group I species reported in the region, but phylogenetic analysis using available COI sequences from GenBank revealed different molecular operational taxonomic units, suggesting an undescribed species, The new species is genetically close and shares a similar paragnath pattern to the Indo-Pacific distributed , in particular in Area III and Areas VII-VIII. Therefore, we suggest it may belong to the same species complex. However, differs from the latter mainly in the shorter length of the postero-dorsal tentacular cirri, median parapodia with much longer dorsal Tentacular cirri, posteriormost parapodia with much wider and greatly expanded dorsal ligules. Additionally, two new records are reported for the Saudi Neom area belonging to and , previously described only for the Egyptian coast (Suez Canal) and are distributed sympatrically with the new species, but apparently not sympatric with each other.
红海环节动物的生物多样性研究有限，需要综合分类学来准确完善该地区的参考文库。作为沙特阿拉伯生物速查活动的一部分，旨在评估红海北部和亚喀巴湾的无脊椎动物生物多样性，鉴于该属已知的分类学模糊性，从潮间带海洋和泻湖状岩石环境中选取了标本进行独立评估。本研究采用了综合方法，将分子数据与形态学和地理数据相结合。我们的结果表明，主要在亚喀巴湾发现的标本不仅在形态上与该地区报告的其他五个类似的第一组物种不同，而且使用来自GenBank的可用COI序列进行的系统发育分析揭示了不同的分子操作分类单元，这表明存在一个未描述的物种。这个新物种在基因上与印度-太平洋分布的物种接近，并且具有相似的副齿模式，特别是在第三区和第七至八区。因此，我们认为它可能属于同一物种复合体。然而，它与后者的主要区别在于后背面触手状触须较短，中侧足的背触手状触须长得多，最末端的侧足的背叶宽得多且大大扩展。此外，还报告了沙特新地区属于[具体物种1]和[具体物种2]的两个新记录，这两个物种以前仅在埃及海岸（苏伊士运河）有描述，并且与新物种同域分布，但显然彼此不同域分布。
