Four new species of Acanthobothrium van Beneden, 1849 (Cestoda: Onchoproteocephalidea) from the spotted skate, Raja straeleni Poll, off the Western Cape, South Africa.

IF 1.5 4区 医学 Q3 PARASITOLOGY
Linda Van Der Spuy, Nico J Smit, Bjoern C Schaeffner
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引用次数: 3

Abstract

The examination of eight spotted skates, Raja straeleni Poll, resulted in the discovery of four new species of Acanthobothrium van Beneden, 1849, namely A. microhabentes sp. n., A. microtenuis sp. n., A. crassus sp. n., and A. dolichocollum sp. n., located off the Western Cape of South Africa. With a total of over 200 valid species of Acanthobothrium recognised worldwide, the use of an integrative approach becomes imperative in the interest of simplifying interspecific comparisons between congeners. In accordance with this, the four new species were incorporated into the category classification system established by Ghoshroy and Caira in 2001, where they were identified as category 2 species, which, at present, includes 47 recognised species of Acanthobothrium. Nevertheless, each of the four new species exhibits postovarian testes, a most intriguing and highly unusual feature among Acanthobothrium, instantly differentiating them from most congeners. This feature has been reported in 12 congeners, which have previously been considered to be restricted to waters of the Indo-Pacific Ocean. Not only do the four new congeners represent the first species of Acanthobothrium reported from southern Africa, but they also represent the first reported species with postovarian testes from the southern Atlantic Ocean. Regarding the legitimacy of the four new species, only two other category 2 species are reported to exhibit this feature, namely A. popi Fyler, Caira et Jensen, 2009, and A. bobconniorum Fyler et Caira, 2010, to which the four congeners were compared to. Acanthobothrium microhabentes sp. n. is the smallest of the congeners and differs from A. popi and A. bobconniorum by having fewer testes and postovarian testes, a shorter body, fewer proglottids, a shorter scolex, and longer cephalic peduncle. Acanthobothrium microtenuis sp. n. differs from A. popi and A. bobconniorum by having fewer testes and postovarian testes, a shorter scolex, longer cephalic peduncle, and the possession of columnar spinitriches on the anterior region of the terminal proglottid. Acanthobothrium crassus sp.n. differs from A. popi and A. bobconniorum by having fewer postovarian testes, a narrower cirrus-sac, larger vitelline follicles, and a longer cephalic peduncle. Acanthobothrium dolichocollum sp. n. is the longest of the four new species and differs from A. popi and A. bobconniorum by having fewer postovarian testes, more postporal testes, a larger body, more proglottids, larger testes and vitelline follicles, and an exceptionally long cephalic peduncle. Apart from differences in overall size, the four new species differ in a combination of measurements for the scolex, vitelline follicles, muscular pad and cephalic peduncle, and the number of proglottids and testes. The four species were recovered from a previously unexplored host and locality, expanding the host associations and geographical distribution of the genus.

1849年南非西开普省Raja straeleni Poll斑点鳐的Acanthobothrium van Beneden四新种(动物类群:Onchoproteocephalidea)。
Raja straeleni Poll对8个斑点冰鞋进行了检查,结果发现了4个新的Acanthobothrium van Beneden, 1849年,即A. microhabentes sp. n., A. microtenuis sp. n., A. crasssus sp.和A. dolichocollum sp. n.,位于南非西开普省。随着棘骨菌属在世界范围内被确认的有效物种总数超过200种,为了简化同系物之间的种间比较,使用综合方法变得势在必行。据此,这4个新种被纳入Ghoshroy和Caira于2001年建立的类分类体系,并被确定为第2类,目前Acanthobothrium已被确认的种有47种。尽管如此,这四个新物种中的每一个都表现出卵巢后睾丸,这是棘骨菌中最有趣和最不寻常的特征,立即将它们与大多数同系物区分开来。这一特征已经在12个同系物中被报道,这些同系物以前被认为仅限于印度洋-太平洋水域。这四个新的同系物不仅代表了非洲南部报道的第一个Acanthobothrium物种,而且它们也代表了来自南大西洋的第一个报道的具有后卵泡睾丸的物种。关于这4个新种的合法性,只有另外2个第2类物种(A. popi Fyler, Caira et Jensen, 2009)和A. bobconniorum Fyler et Caira, 2010)被报道具有这一特征,并与这4个同属物种进行了比较。microhabentes Acanthobothrium sp. n.是同类中最小的,与a . popi和a . bobconniorum的不同之处是睾丸和卵后睾丸较少,身体较短,前脚较少,头节较短,头状花序较长。细刺棘球绦虫(Acanthobothrium microtenuis sp. n.)与a . popi和a . bobconniorum的不同之处是睾丸和卵后睾丸较少,头节较短,头足柄较长,在末端的前门上有柱状刺。砂棘菌属与a . popi和a . bobconniorum的不同之处是卵泡后睾丸较少,卷囊较窄,卵黄卵泡较大,头部花梗较长。Acanthobothrium dolichocollum sp. n.是四个新种中最长的,不同于a . popi和a . bobconniorum,其卵泡后睾丸较少,卵泡后睾丸较多,身体较大,有较多的前体,较大的睾丸和卵泡,以及一个特别长的头状花序梗。除了整体大小的不同,这四个新物种在头节、卵泡、肌肉垫和头柄的测量组合以及前肢和睾丸的数量上也存在差异。这4种是在以前未开发的寄主和地点恢复的,扩大了该属的寄主联系和地理分布。
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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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