A new species of Loricaria (Loricariidae: Loricariinae) from the upper Amazon River basin, Colombia

IF 2 4区生物学 Q1 ZOOLOGY

Neotropical Ichthyology Pub Date : 2023-09-08 DOI:10.1590/1982-0224-2023-0008

A. Londoño-Burbano, Alexander Urbano-Bonilla, Matthew R. Thomas, M. R. Britto

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Abstract

Abstract A new species of Loricaria is described from the upper Amazon River basin, Colombia. The new species is distinguished from its congeners primarily by having the dorsal portion of head with uniform black or dark brown coloration extending to three or four plates posterior to dorsal fin base, or with two longitudinal bands from tip of the snout to origin of dorsal fin; abdominal plates tightly joined and completely covering the median abdominal space and pectoral girdle; and pectoral and dorsal fins totally black or dark brown, without bands, spots, or blotches. The new species is further distinguished by plate counts, and body measurements. An analysis of genetic distances using the cytochrome oxidase c subunit 1 marker of the mitochondrial genome showed a clear differentiation between the new species and Loricaria cataphracta (5.8–7.6%), L. nickeriensis (5.7–6.1%), and L. simillima (2.7–7.0%). Species delimitation analyses were carried out, which further supported the new species as a divergent lineage within the genus. Fish species diversity of the upper Amazon River basin and taxonomic issues related to L. simillima are included as part of the discussion.

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标题哥伦比亚亚马逊河上游蛭蝇属一新种(蛭蝇科:蛭蝇科)

摘要报道了哥伦比亚亚马孙河上游Loricaria属一新种。新种与同类的区别，主要表现在其头的背部具有均匀的黑色或深褐色，延伸到背鳍基部后的三或四板，或从鼻尖到背鳍起源有两条纵向带;腹板紧密连接，完全覆盖腹中间隙和胸带;胸鳍和背鳍全黑或深褐色，无带、斑点或斑点。新物种通过板块数量和身体尺寸进一步区分。利用线粒体基因组细胞色素氧化酶c亚基1标记的遗传距离分析表明，新种与Loricaria cataphracta(5.8-7.6%)、L. nickeriensis(5.7-6.1%)和L. simillima(2.7-7.0%)有明显的差异。物种划分分析进一步支持了新种作为属内分支的观点。讨论了亚马孙河上游流域的鱼类物种多样性和相似L.的分类问题。

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来源期刊

Neotropical Ichthyology 生物-动物学

CiteScore

2.80

自引率

17.60%

发文量

审稿时长

6-12 weeks

期刊介绍： Neotropical Ichthyology is the official journal of the Sociedade Brasileira de Ictiologia (SBI). It is an international peer-reviewed Open Access periodical that publishes original articles and reviews exclusively on Neotropical freshwater and marine fishes and constitutes an International Forum to disclose and discuss results of original research on the diversity of marine, estuarine and freshwater Neotropical fishes. -Frequency: Four issues per year published only online since 2020, using the ‘rolling pass’ system, which posts articles online immediately as soon as they are ready for publication. A searchable and citable Digital Object Identifier (DOI) is assigned to each article immediately after online publication, with no need to await the issue’s closing. -Areas of interest: Biology, Biochemistry and Physiology, Ecology, Ethology, Genetics and Molecular Biology, Systematics. -Peer review process: The Editor-in-Chief screens each manuscript submitted to Neotropical Ichthyology to verify whether it is within the journal’s scope and policy, presents original research and follows the journal’s guidelines. After passing through the initial screening, articles are assigned to a Section Editor, who then assigns an Associate Editor to start the single blind review process.