Moravec Frantisek, Salgado-Maldonado Guillermo, Caspeta-Mandujano Juan M, González-Solís David
Institute of Parasitology, Biology Centre of the Academy of Sciences of the Czech Republic, Branisovská 31, 370 05 Ceské Budĕjovice, Czech Republic.
Folia Parasitol (Praha). 2009 Dec;56(4):305-12. doi: 10.14411/fp.2009.035.
Two little-known species of Spinitectus (Nematoda: Cystidicolidae) were, for the first time, recorded from fishes of the Lacantún River (Usumacinta River basin) in the Lacandon rain forest, Chiapas, southern Mexico: S. tabascoensis Moravec, Garcia-Magaña et Salgado-Maldonado, 2002 in intestines of Ictalurus furcatus (Valenciennes) (Ictaluridae) (adults and juveniles), Cathorops aguadulce (Meek) and Potamarius nelsoni (Evermann et Goldsborough) (both Ariidae) (in both only juveniles), and S. osorioi Choudhury et Pérez-Ponce de León, 2001 in Atherinella alvarezi (Díaz-Pardo) (Atherinopsidae) (adults in intestine) and Eugerres mexicanus (Steindachner) (Gerreidae) (adults and juveniles in stomach). Eugerres mexicanus, C. aguadulce and P. nelsoni represent new host records. Detailed light and electron microscopical studies of S. tabascoensis revealed some taxonomically important, previously not observed features, such as cuticular spines arranged in four sectors, the cephalic structure, the number (2) of ventral precloacal ridges or the structure of the male caudal end. Therefore, Spinitectus tabascoensis is redescribed. Spinitectus macrospinosus Choudhury et Perryman, 2003, described from ictalurids in Canada and the USA, is considered its junior synonym. Spinitectus tabascoensis seems to be a specific parasite of Ictalurus spp., whereas C. aguadulce and P. nelsoni, as well as some other fishes, serve only as its paratenic hosts. The definitive hosts of S. osorioi are atherinopsid fish (A. alvarezi, Chirostoma spp.), whereas the gerreid E. mexicanus probably serves only as its postcyclic host.
在墨西哥南部恰帕斯州拉坎顿雨林的拉坎通河（乌苏马辛塔河流域）的鱼类中，首次记录到两种鲜为人知的旋尾线虫属（线虫纲：囊尾科）物种：2002年发现的塔巴斯科旋尾线虫（Spinitectus tabascoensis），寄生于叉尾鮰（Ictalurus furcatus）（瓦朗谢讷）（鮰科）（成鱼和幼鱼）、阿瓜杜尔塞真燕鳉（Cathorops aguadulce）（米克）和尼尔森河唇鲿（Potamarius nelsoni）（埃弗曼和戈兹伯勒）（均为海鲶科）（仅幼鱼）的肠道内；以及2001年发现的奥索里奥旋尾线虫（Spinitectus osorioi），寄生于阿尔瓦雷兹小银汉鱼（Atherinella alvarezi）（迪亚斯-帕尔多）（银汉鱼科）（成鱼在肠道内）和墨西哥银鲈（Eugerres mexicanus）（施泰因达赫纳）（钻嘴鱼科）（成鱼和幼鱼在胃内）。墨西哥银鲈、阿瓜杜尔塞真燕鳉和尼尔森河唇鲿代表新的宿主记录。对塔巴斯科旋尾线虫进行的详细光学和电子显微镜研究揭示了一些在分类学上重要的、以前未观察到的特征，如表皮刺排列成四个扇区、头部结构、腹侧泄殖腔前嵴的数量（2条）或雄性尾端的结构。因此，对塔巴斯科旋尾线虫进行了重新描述。2003年从加拿大和美国的鮰科鱼类中描述的大刺旋尾线虫（Spinitectus macrospinosus）被认为是其次异名。塔巴斯科旋尾线虫似乎是叉尾鮰属鱼类的特异性寄生虫，而阿瓜杜尔塞真燕鳉和尼尔森河唇鲿以及其他一些鱼类仅作为其转续宿主。奥索里奥旋尾线虫的终末宿主是银汉鱼科鱼类（阿尔瓦雷兹小银汉鱼、奇罗斯托马属鱼类），而钻嘴鱼科的墨西哥银鲈可能仅作为其后循环宿主。
