Yang Mei, Cui Xiaodong, Li Xinzheng, Dong Dong, Kang Xianjiang, Gan Zhibin
Department of Marine Organism Taxonomy & Phylogeny, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
College of Life Sciences, Hebei University, Baoding 071002, China.
Curr Issues Mol Biol. 2024 Oct 31;46(11):12279-12298. doi: 10.3390/cimb46110729.
The genus , originating from East Asia and representing a small-size landlocked shrimp group of the family Atyidae, is an important group of ornamental shrimps and plays significant ecological roles in their natural habitats. Owing to the considerable variability of the taxonomic characters it employed, is constantly under revision, and the validation of several species is currently questionable. In the present study, several shrimps were collected from the Baiyangdian drainage area. Through morphological examination, they exhibited delicately diagnostical differences in the dactyli of the third pereiopod and the endopod of the first and second pleopod and were classified into morph A, morph B and morph C. According to the literature description, morph A and morph C were identified as and , respectively. Among them, morph B presents an intermediate state between morph A and morph C. Subsequently, we determined the mitogenomes of morph A, morph B and morph C. Based on the morphological characteristics, genetic variation and phylogenetic tree, we contend that , , and should belong to the same species, and we propose retaining the name . The reconstructed mitogenomic phylogeny indicated that the monophyly of several genera within Atyidae has been challenged, suggesting that the established classification of Atyidae requires substantial taxonomic revision at all taxonomic levels. Furthermore, the tree's topologies supported Atyidae at a deeper base within Caridea. More comprehensive taxon sampling is still needed to resolve the explicit internal relationships among Caridea.
该属起源于东亚，是匙指虾科小型内陆虾类群，是重要的观赏虾类群，在其自然栖息地发挥着重要的生态作用。由于其所采用的分类特征存在相当大的变异性，该属一直在修订中，目前几种物种的有效性存在疑问。在本研究中，从白洋淀流域采集了几种该属虾类。通过形态学检查，它们在第三对步足的指节以及第一和第二腹足的内肢上表现出细微的诊断差异，并被分为形态A、形态B和形态C。根据文献描述，形态A和形态C分别被鉴定为[具体物种1]和[具体物种2]。其中，形态B呈现出介于形态A和形态C之间的中间状态。随后，我们测定了形态A、形态B和形态C的线粒体基因组。基于形态特征、遗传变异和系统发育树，我们认为[具体物种1]、[具体物种2]、[具体物种3]和[具体物种4]应属于同一物种，并建议保留[具体物种名称]这一名称。重建的线粒体基因组系统发育表明，匙指虾科内几个属的单系性受到了挑战，这表明已建立的匙指虾科分类需要在所有分类水平上进行重大的分类修订。此外，该树的拓扑结构支持匙指虾科在真虾下目内处于更深的基部。仍需要更全面的分类群采样来解决真虾下目内部明确的亲缘关系。
