Abstract：
In Brazil, acanthocephalans parasitise anurans in several biomes. In the present study, we performed an analysis of acanthocephalan infections across 175 anuran individuals from the Cerrado biome, belonging to ten species: Boana raniceps, Pithecopus hypochondrialis, Scinax fuscomarginatus, Scinax x-signatus, Leptodactylus pustulatus, Leptodactylus macrosternum, Leptodactylus vastus, Physalaemus cuvieri, Adenomera hylaedactyla, and Elachistocleis piauiensis. We also verified the specificity of the parasites using the STD* index. Additionally, we conducted a survey of acanthocephalan infection in anurans in South America. The studied assemblage in the Brazilian Cerrado presented 57 parasitised hosts of 175 specimens (overall prevalence: 32.6%). In total, 437 acanthocephalans cystacanths were recorded, among which 286 presented the same morphotype but could not be identified, 148 belonged to the genus Centrorhynchus, and three belonged to Oncicola. Unidentified acanthocephalans had a higher prevalence in L. vastus (53.85%) and the highest intensity was in L. pustulatus (17±16). The highest prevalence of Centrorhynchus sp. was in the species S. fuscomarginatus (28.57%), while the highest intensity was observed in L. vastus (111). The taxon Oncicola sp. it had a prevalence of 3.23% and an intensity of 3 only in S. x-signatus. The highest specificity was recorded for Oncicola sp. (STD*= 1), whereas the lowest was found in Centrorhynchus sp. (STD*= 2.21). Finally, according to the survey for South America, we found ten records of acanthocephalan taxa parasitizing 58 species of anurans distributed in seven countries (Brazil with the most records).
摘要：
在巴西,棘头虫在几个生物群落中寄生无尾虫。在本研究中,我们对来自Cerrado生物群系的175个无脑个体进行了无头法菌感染分析，属于十个物种：Boanaraniceps，软骨病斑马,镰刀状镰刀菌，闪烁x信号，短吻鳄,巨大胸骨钩指,左臂，Physalaemuscuvieri,腺样体，和Piauiensis。我们还使用STD*指数验证了寄生虫的特异性。此外,我们在南美的无尾虫中进行了一项无尾虫感染的调查。巴西Cerrado的研究组合呈现了175个标本的57个寄生宿主（总体患病率：32.6％）。总的来说,记录了437个棘头虫，其中286个呈现相同的形态类型，但无法识别，148属于Centrorhynchus属，三个属于Oncicola.身份不明的棘头鱼在马铃薯中的患病率较高（53.85％），而最高的强度在马铃薯中（17±16）。Centrorhynchussp的患病率最高。在S.fuscomarginatus物种中（28.57％），而强度最高的是L.vastus（111）。分类单元Oncicolasp.仅在S.x-signatus中，它的患病率为3.23%，强度为3。记录到Oncicolasp的最高特异性。(STD*=1),而最低的是在Centrorhynchussp。（STD*=2.21）。最后,根据对南美的调查，我们发现了十条寄生在七个国家（巴西的记录最多）的58种无尾动物的寄生类群的记录。
