Caspeta-Mandujano J M, Moravec F, Salgado-Maldonado G
Centre of Biological Research, Autonomous University of Morelos State, Cuernavaca, Mexico.
Folia Parasitol (Praha). 1999;46(4):289-95.
A new cucullanid nematode, Dichelyne mexicanus sp. n., is described from the intestine of three species of fishes, Agonostomus monticola (Bancroft) (Mugilidae, Perciformes) (type host), Ictalurus balsanus (Jordan et Snyder) (Ictaluridae, Siluriformes) and Cichlasoma beani (Jordan) (Cichlidae, Perciformes), from three rivers (La Maquina River, Veracruz; Chontalcoatlán River, Guerrero and Santiago River, Nayarit) in central Mexico. This species is characterised by the absence of a ventral sucker in the male (subgenus Dichelyne) and it differs from its congeners mainly in possessing very unequal and dissimilar spicules (left 0.465-0.768 mm and right 293-548 mm long), an asymmetrical gubernaculum, and two intestinal caeca. Another cucullanid nematode, Cucullanus caballeroi Petter, 1977, is reported from Dormitator maculatus (Bloch) (Eleotridae, Perciformes) from the La Palma and La Maquina Rivers and Balzapote stream, Veracruz, being briefly described and illustrated; this represents a new host record. Findings of D. mexicanus and C. caballeroi represent a new record of cucullanid nematodes from fishes in Mexican fresh waters.
从墨西哥中部三条河流（韦拉克鲁斯的拉马基纳河、格雷罗的乔塔尔科阿特兰河和纳亚里特的圣地亚哥河）的三种鱼类——蒙蒂科拉无鬚鲻（班克罗夫特）（鲻科，鲈形目）（模式宿主）、巴氏真鮰（乔丹和斯奈德）（真鮰科，鲇形目）和比氏丽体鱼（乔丹）（丽鱼科，鲈形目）的肠道中，描述了一种新的冠口线虫，即墨西哥双冠线虫（新种）。该物种的特征是雄性（双冠线虫亚属）无腹吸盘，与同属其他物种的主要区别在于具有极不相等且形态各异的交合刺（左侧长0.465 - 0.768毫米，右侧长293 - 548毫米）、不对称的引带和两条肠盲囊。还报道了另一种冠口线虫，即卡瓦列罗冠口线虫（佩特，1977年），来自韦拉克鲁斯的帕尔马河和拉马基纳河以及巴尔萨波特溪的黄斑塘鳢（布洛赫）（塘鳢科，鲈形目），并对其进行了简要描述和图示；这代表了一个新的宿主记录。墨西哥双冠线虫和卡瓦列罗冠口线虫的发现代表了墨西哥淡水鱼类冠口线虫的新记录。
