Gutiérrez-Aguirre Martha Angélica, Cervantes-Martínez Adrián
Universidad Autónoma del Estado de Quintana Roo (UQROO), Campus Cozumel, Av. Andrés Quintana Roo s/n, 77600, Cozumel, Quintana Roo, Mexico Universidad Autónoma del Estado de Quintana Roo Cozumel Mexico.
Zookeys. 2023 Aug 3;1173:111-130. doi: 10.3897/zookeys.1173.97827. eCollection 2023.
Two species of the freshwater copepod genus are redescribed, Dussart, 1984, and Dussart, 1984 from type specimens. Redescription includes the microstructure of intercoxal sclerites and the basipodites of thoracic appendages, as well as the urosomal microstructure. According to the cluster (UPGMA and Euclidean distance) and PCA analyses performed, it was possible to improve the resolution between the American species by considering characters such as the distal region of antennal basis, the maxillary ornamentation, and the thoracic appendages, especially the intercoxal sclerites and medial margin of the basipodite of the first to fourth trunk limbs. Considering a set of 28 morphological characters in adult females, traditional features such as the length ratio of caudal rami, the length: width ratio of the third endopod of the fourth leg, or the length ratios between apical setae of the same segment, appear to be less important for defining differences between very similar species of American . In these analyses, the redescription of the Palearctic was considered, and this species was clearly separated from the American Kiefer, 1934 and Gutiérrez-Aguirre and Cervantes-Martínez, 2016.
对淡水桡足类的两个物种进行了重新描述，这两个物种分别是1984年杜萨尔描述的[具体物种1]以及1984年杜萨尔描述的[具体物种2]，依据模式标本进行描述。重新描述内容包括基节间骨片的微观结构、胸部附肢的底节以及尾节的微观结构。根据进行的聚类分析（非加权组平均法和欧氏距离）和主成分分析，通过考虑诸如触角基部远端区域、上颌装饰以及胸部附肢等特征，尤其是第一至第四躯干肢体基节间骨片和底节内侧边缘等特征，能够提高对美洲[具体物种]不同物种间的分辨能力。在成年雌性中考虑一组28个形态特征时，传统特征如尾叉长度比、第四对腿第三内肢的长宽比或同一节段顶端刚毛之间的长度比，对于界定非常相似的美洲[具体物种]之间的差异似乎不太重要。在这些分析中，考虑了古北区[具体物种]的重新描述，该物种与美洲的1934年基弗描述的[具体物种]以及2016年古铁雷斯 - 阿吉雷和塞万提斯 - 马丁内斯描述的[具体物种]明显区分开来。
