Salgado-Barragán José, Grano-Maldonado Mayra Ixchel
Laboratorio de Invertebrados Bentónicos, Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, Universidad Nacional Autónoma de México, P.O. Box 811, 82000, Mazatlán, Sinaloa, Mexico.
Facultad de Ciencias del Mar, Universidad Autónoma de Sinaloa, Paseo Claussen s-n, Mazatlán, Sinaloa, Mexico.
Syst Parasitol. 2025 Aug 13;102(5):51. doi: 10.1007/s11230-025-10241-z.
A second species of "tongue-eaters," the cymothoid isopod Cymothoa facimar sp. nov., is described from the coasts of Sinaloa on the Mexican Pacific coast. Twenty-seven females and five males of the new species were collected from the oral cavity of the snappers Lutjanus peru and L. aratus caught for sale in Mazatlán fish markets. The new species is morphologically similar to C. exigua, the previously known species reported from the Eastern Pacific, in general shape of body, cephalon, the anterior pereonites, pereopods and pleotelson; however, they can be easily differentiated because adult females of the new species are larger and slender than those of C. exigua and because they show differences in the dorsal surface of pereonites, the shape of the seventh pereonite and cephalon and the relative size of exopodite and endopodite of the uropods. The new species is morphologically similar to C. exigua, the only species of Cymothoa described so far from the Eastern Pacific, particularly in the general shape of the body, cephalon, anterior pereonites, pereopods, and pleotelson. Nonetheless, it can be readily distinguished from C. exigua by several diagnostic features: adult females attain larger body sizes and exhibit a slenderer morphology especially in the ovigerous females; additionally, differences are present in the dorsal sculpturing of the pereonites, the shape of the sixth and seventh pereonites, and the relative proportions of the exopodite and endopodite of the uropods. Cymothoa facimar sp. nov. resembles C. excisa, a species reported from the western Atlantic. Still, the two species can be differentiated by the relative length of the fourth pereonite, which is more prominent in the Atlantic species. The new species is described herein, and a discussion on the status of C. exigua is presented in reports from other regions of the Eastern Pacific.Zoobank registration: http://zoobank.org/urn:lsid:zoobank.org:pub:E5B44B8C-DFD2-423A-A554-62A2D4FB464F http://zoobank.org/urn:lsid:zoobank.org:act:D3FADC01-5267-4DE4-AB15-A98C01F1B876.
第二种“食舌者”，即食舌亚目的等足类动物费氏食舌虱（Cymothoa facimar sp. nov.），是在墨西哥太平洋沿岸锡那罗亚州的海岸发现并被描述的。从马萨特兰鱼市上售卖的秘鲁笛鲷（Lutjanus peru）和黄鳍笛鲷（L. aratus）的口腔中采集到了27只该新物种的雌性个体和5只雄性个体。该新物种在身体、头部、前几节胸节、步足和尾节的总体形态上，与先前报道的东太平洋已知物种艾氏食舌虱（C. exigua）相似；然而，它们很容易区分，因为该新物种的成年雌性比艾氏食舌虱的更大且更细长，并且它们在胸节的背面、第七节胸节和头部的形状以及尾足外肢和内肢的相对大小上存在差异。该新物种在形态上与艾氏食舌虱相似，艾氏食舌虱是迄今为止从东太平洋描述的唯一一种食舌虱，特别是在身体、头部、前几节胸节、步足和尾节的总体形态上。尽管如此，它可以通过几个诊断特征与艾氏食舌虱轻易区分开来：成年雌性个体更大，形态更细长，尤其是怀卵雌性；此外，在胸节的背面雕刻、第六和第七节胸节的形状以及尾足外肢和内肢的相对比例上存在差异。费氏食舌虱与西大西洋报道的一种食舌虱——切割食舌虱（C. excisa）相似。不过，这两个物种可以通过第四节胸节的相对长度来区分，在大西洋物种中该节更为突出。本文描述了这个新物种，并在东太平洋其他地区的报告中对艾氏食舌虱的情况进行了讨论。
http://zoobank.org/urn:lsid:zoobank.org:pub:E5B44B8C-DFD2-423A-A554-62A2D4FB464F
http://zoobank.org/urn:lsid:zoobank.org:act:D3FADC01-5267-4DE4-AB15-A98C01F1B876
