Redescription of Proteocephalus fallax La Rue, 1911 (Cestoda) and a list of proteocephalid tapeworms of whitefish (Coregonus spp.).

IF 1.5 4区 医学 Q3 PARASITOLOGY
Tomas Scholz, Alain de Chambrier, Jan Brabec, Rune Knudsen, Isabel Blasco-Costa
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引用次数: 0

Abstract

Tapeworms of the genus Proteocephalus Weinland, 1858 (Cestoda: Proteocephalidae) are common and widespread intestinal parasites of whitefish (Coregonus spp., Salmonidae: Coregoninae). Previous taxonomic studies, based solely on morphology and inconsistently fixed specimens, concluded that all salmoniform fish, including whitefish, are parasitised by a single euryxenous and highly polymorphic species, Proteocephalus longicollis (Zeder, 1800). However, recent molecular phylogenetic analyses have revealed the existence of several species specific to individual genera or even species of salmoniform fish. In this study, Proteocephalus fallax La Rue, 1911 is redescribed based on newly collected and genetically characterised specimens from several Coregonus species in Switzerland, the type locality of the species, and in Norway. This cestode was previously synonymised with P. exiguus La Rue, 1911, a parasite of whitefish in North America, but the two species are not closely related. Proteocephalus fallax differs from P. exiguus in its larger body size, wider proglottids, shorter cirrus sac and broader scolex. In addition, the other Proteocephalus species described in whitefish are briefly discussed, with comments on their validity, host range and distribution.

重新描述 Proteocephalus fallax La Rue, 1911(绦虫纲)和白鲑(Coregonus spp.)
Proteocephalus Weinland, 1858(绦虫纲:Proteocephalidae)绦虫属是白鲑(Coregonus spp.,鲑科:Coregoninae)常见且广泛的肠道寄生虫。以前的分类研究仅根据形态学和不一致的固定标本得出结论,认为包括白鲑在内的所有鲑形目鱼类都寄生于一个单一的无尾且高度多态的物种 Proteocephalus longicollis(Zeder,1800 年)。然而,最近的分子系统学分析表明,鲑形鱼的个别属甚至种还存在多个特有种。在本研究中,Proteocephalus fallax La Rue, 1911 根据新采集的标本进行了重新描述,这些标本来自瑞士(该物种的模式产地)和挪威的几个鲑科鱼类。exiguus La Rue, 1911 的异名,但这两个物种的亲缘关系并不密切。Proteocephalus fallax 与 P. exiguus 的不同之处在于体型更大、前体更宽、卷须囊更短和肛门襞更宽。此外,还简要讨论了在白鲑中描述的其他 Proteocephalus 种,并对其有效性、寄主范围和分布进行了评论。
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来源期刊
Folia Parasitologica
Folia Parasitologica 医学-寄生虫学
CiteScore
2.70
自引率
0.00%
发文量
25
审稿时长
>12 weeks
期刊介绍: FOLIA PARASITOLOGICA, issued in online versions, is an international journal that covers the whole field of general, systematic, ecological and experimental parasitology. It publishes original research papers, research notes and review articles. Contributions from all branches of animal parasitology, such as morphology, taxonomy, biology, biochemistry, physiology, immunology, molecular biology and evolution of parasites, and host-parasite relationships, are eligible. Novelty and importance in the international (not local or regional) context are required. New geographical records of parasites, records of new hosts, regional parasite and/or host surveys (if they constitute the principal substance of manuscript), local/regional prevalence surveys of diseases, local/regional studies on epidemiology of well known diseases and of parasite impact on human/animal health, case reports, routine clinical studies and testing of established diagnostic or treatment procedures, will not be considered. One species description will also not be considered unless they include more general information, such as new diagnostic characters, host-parasite associations, phylogenetic implications, etc. Manuscripts found suitable on submission will be reviewed by at least two reviewers.
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