一个新的属,Cordicestus,被提议容纳北美和中美洲的proteocephalid虫寄生gars(Lepisosteiformes:Lepisosteidae),这些细菌以前被放置在ProteocephalusWeinland中,1858.新属与其他蛋白质类属的不同之处在于其特殊的形态。它很小,顶端突出,但没有顶端器官,熊扁平,心形(=Cordis)吸盘。此外,新属的物种有一个细长的卷卷囊,内部输精管几乎是直的,和广泛的,弯曲的腹侧渗透调节管具次生管向外。新属的类型物种,奇异的Cordicestussingularis(LaRue,1911)n.梳子。,根据短鼻子的新材料重新描述,LepisosteusplatostomusRafinesque(型宿主),还有斑点的gar,L.OculatusWinchell,在美国。Cordicestusrafaelin.sp.是从热带雨林描述的,TropicusGill,在墨西哥。新物种与其亲戚的不同之处主要在于craspedoteproglottids(其他物种中的acraspedote)的存在和一些生物特征。讨论了Cordicestus的种类,包括来自尼加拉瓜和古巴的Tropicus和古巴garA.tristoechus(布洛赫和施耐德)的身份不明的标本,分别,可能是新物种,并提供了识别这些分类群的密钥。可获得的新属的两个标称物种的分子数据表明,在美国的Lepisosteus中可能存在另一种Cordicestus。
A new genus, Cordicestus, is proposed to accommodate proteocephalid
tapeworms parasitising gars (Lepisosteiformes: Lepisosteidae) in North and Central America that were previously placed in the polyphyletic genus Proteocephalus Weinland, 1858. The new genus differs from other proteocephalid genera by the particular morphology of the scolex, which is small, protrudes apically but has no apical organ, and bears flat, heart-shaped (= cordis) suckers. In addition, the species of the new genus have an elongated cirrus sac with an almost straight internal vas deferens and wide, sinuous ventral osmoregulatory canals with secondary canals directed outwards. The type species of the new genus, Cordicestus singularis (La Rue, 1911) n. comb., is redescribed based on new material from the shortnose gar, Lepisosteus platostomus Rafinesque (type host), and the spotted gar, L. oculatus Winchell, in the United States. Cordicestus rafaeli n. sp. is described from the tropical gar, Atractosteus tropicus Gill, in Mexico. The new species differs from its relatives primarily by the presence of craspedote proglottids (acraspedote in other species) and some biometric features. All species of Cordicestus are revised, including unidentified specimens from A. tropicus and the Cuban gar A. tristoechus (Bloch and Schneider) in Nicaragua and Cuba, respectively, which may be new species, and a key to the identification of these taxa is provided. Molecular data available for two nominal species of the new genus indicate the possible existence of another species of Cordicestus in Lepisosteus in the USA.