Scholz Tomás, Rosas Rogelio, Pérez-Ponce de León Gerardo, Choudhury Anindo, de Chambrier Alain
Institute of Parasitology, Academy of Sciences of the Czech Republic, Branisovská 31, 370 05 Ceské Budejovice, Czech Republic.
J Parasitol. 2003 Dec;89(6):1212-9. doi: 10.1645/GE-3151.
The taxonomic status of Choanoscolex lamothei, a proteocephalidean tapeworm described from the catfish Ictalurus meridionalis (= I. furcatus) from Oaxaca, Mexico, was evaluated on the basis of morphological examination of types and freshly collected specimens from the type host and partial sequences of the large subunit (28S) ribosomal DNA. This study revealed that C. lamothei is a species of Megathylacoides (Proteocephalidae: Corallobothriinae) because of the medullary position of the genitalia (entirely cortical in Choanoscolex), the presence of semispherical sphincters on the suckers, a follicular ovary, and the alternating position of the vagina. Megathylacoides lamothei n. comb. differs from congeneric species in lacking an apical organ and in the number (130-208) of testes. Molecular data confirm the position of M. lamothei within Megathylacoides, which contains species parasitizing ictalurid fishes in North America.
基于对模式标本的形态学检查、从模式宿主新鲜采集的标本以及大亚基（28S）核糖体DNA的部分序列，对采自墨西哥瓦哈卡州的南方鲶（=叉尾鲶）体内的一种原头绦虫——拉莫氏筛头绦虫的分类地位进行了评估。这项研究表明，拉莫氏筛头绦虫是巨槽盘属（原头科：珊瑚槽盘亚科）的一个物种，这是因为其生殖器官位于髓质位置（在筛头绦虫中完全位于皮质）、吸盘上有半球形括约肌、卵泡状卵巢以及阴道的交替位置。新组合的拉莫氏巨槽盘绦虫与同属物种的区别在于没有顶端器官以及睾丸数量（130 - 208个）不同。分子数据证实了拉莫氏巨槽盘绦虫在巨槽盘属中的地位，该属包含寄生于北美叉尾鮰科鱼类的物种。
