毛囊虫一新种(siluriforma: Loricariidae)使橡胶鼻Plecos的分布向东扩展到巴西亚马逊河下游

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2022-06-29 DOI:10.1643/i2021068
Vanessa Meza-Vargas, Bárbara B. Calegari, N. Lujan, G. A. Ballen, O. T. Oyakawa, L. Sousa, L. R. Py-Daniel, R. Reis
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引用次数: 0

摘要

在巴西帕拉州的Maicuru河和Seiko河,分别是亚马逊河下游的北支流和新谷河下游的支流,描述了一种橡胶鼻蝶属的新种。新物种是从所有同源物种中诊断出来的,除了肛门毛口物种组的成员,通过放大的第二条带后部成对真皮皮瓣的无分支肛门鳍射线。此外,该新物种与目前唯一被认可的圭亚那地盾排水河流中的同类物种(C.jegui和C.vasquezi)的区别在于,该物种具有较小的操纵管和未发育的枕上排泄物,包括幼年时存在而成年时不存在的简单皮肤区域。提出了一个修正的毛口藻属物种的多位点系统发育,并对肛门毛口藻物种群进行了讨论和重排。在巴西帕拉州,亚马逊河下游的北支流Maicuru和新谷河下游的支流Seiko发现了一种新的Chaetostoma。这个新物种被诊断为除肛门毛口组成员外的所有同源物种,因为它的臀鳍第二个非分支半径增大,并有后真皮瓣。此外,该新物种与目前唯一公认的圭亚那地盾同源物种(C.jegui和C.vasquezi)的区别在于,该物种具有较小的顶盖和未发育的枕上突起,幼年时由一个简单的皮肤区域组成,成年时没有。提出了一个修正的毛口虫物种的多点系统发育,并对肛门毛口虫群进行了讨论和重组。
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A New Species of Chaetostoma (Siluriformes: Loricariidae) Expands the Distribution of Rubbernose Plecos Eastward into the Lower Amazon Basin of Brazil
A new species of the rubbernose pleco genus Chaetostoma is described from the Maicuru and Seiko Rivers, a northern tributary of the lower Amazon River and a tributary of the lower Xingu River, respectively, both in Pará State, Brazil. The new species is diagnosed from all congeners, except members of the Chaetostoma anale species group, by having an enlarged second unbranched anal-fin ray with posterior paired dermal flaps. Additionally, the new species is distinguished from its only other currently recognized congeners from rivers draining the Guiana Shield (C. jegui and C. vasquezi) by having a smaller opercle and a supraoccipital excrescence undeveloped, comprising a simple skin area present in juveniles and absent in adults. A revised multi-locus phylogeny for the species of Chaetostoma is presented, and the Chaetostoma anale species group is discussed and rearranged. Uma nova espécie de Chaetostoma é descrita dos rios Maicuru, um afluente norte do baixo rio Amazonas, e Seiko, um afluente do baixo rio Xingu, ambos no estado do Pará, Brasil. A nova espécie é diagnosticada de todos os seus congêneres, exceto membros do grupo Chaetostoma anale, por apresentar o segundo raio não ramificado da nadadeira anal aumentado e com abas dérmicas posteriores. Além disso, a nova espécie se distingue dos únicos outros congêneres atualmente reconhecidos do Escudo das Guianas (C. jegui e C. vasquezi) por ter o opérculo menor e a protuberância supraoccipital não desenvolvida, composta por uma área de pele simples em juvenis e ausente em adultos. Uma filogenia multilocus revisada para as espécies de Chaetostoma é apresentada e o grupo Chaetostoma anale é discutido e reorganizado.
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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