Three New Earthworm Species of the Genera Amynthas and Metaphire (Oligochaeta: Megascolecidae) From Leshan, China.

IF 0.9 4区 生物学 Q3 ZOOLOGY
Jiuzhuolin Ren, Yiting Liu, Shilin Zhang, Chengli Zheng, Youli Tan, Cheng Peng, Jihai Gao, Feixia Hou
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Abstract

Based on morphological and molecular evidence, three new earthworm species of the genera Amynthas Kinberg, 1867 and Metaphire Sims and Easton, 1972 from Leshan City of southwest China's Sichuan Province were identified in this study. They are named Amynthas agenesis sp. nov., Metaphire jinhensis sp. nov., and M. ebianensis sp. nov. All three new species have a large size (the dimensions of the adult body are more than 200 mm × 10 mm) and three pairs of spermathecal pores in 6/7-8/9. Although these three new species are morphologically somewhat similar to the other species in the same group, they are distinguishable in several morphological characteristics. Metaphire jinhensis sp. nov. has paired and bunchy ovaries that are attached to septa 12/13. Metaphire ebianensis sp. nov. has large and well-developed prostate glands, and each of its seminal vesicles has a dorsal lobe. Amynthas agenesis sp. nov. has accessory glands in spermathecae, prostate, and intestinal caeca regions. The maximum likelihood tree was constructed based on the mitochondrial cytochrome c oxidase subunit I gene, and it showed that the three new species are clustered on different branches. Besides, phylogenetic trees also suggested that the genera Amynthas and Metaphire did not evolve separately within their respective taxa and thus were not monophyletic. This study provides a detailed taxonomic characterization of three new species and helps to better understand the species diversity of earthworms, which is urgently needed to ensure the ecological stability of wild earthworms.

乐山无足蚓属和半足蚓属三新种(寡毛纲:大蚓科)。
本文根据形态和分子证据,鉴定了四川乐山地区3个蚯蚓新种Amynthas Kinberg, 1867和Metaphire Sims and Easton, 1972。它们被命名为Amynthas agenesis sp. nov.、Metaphire jinhensis sp. nov.和M. ebianensis sp. nov.。这三个新种都具有较大的体型(成体尺寸超过200 mm × 10 mm)和6/7-8/9的3对精囊孔。虽然这三个新种在形态上与同一类群中的其他种有些相似,但它们在几个形态特征上是可区分的。中叶锦鸡属11 .有成对和束状的子房,附着在中隔12/13上。中期ebianensis sp. 11 .有大而发达的前列腺,每个精囊有一背叶。在精囊、前列腺和肠盲肠区域有副腺。基于线粒体细胞色素c氧化酶亚基I基因构建了最大似然树,结果表明3个新种聚集在不同的分支上。此外,系统发育树还表明,Amynthas属和Metaphire属在各自的分类群中并不是单独进化的,因此不是单系的。本研究提供了三个新物种的详细分类特征,有助于更好地了解蚯蚓的物种多样性,这是确保野生蚯蚓生态稳定所迫切需要的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Zoological Science
Zoological Science 生物-动物学
CiteScore
1.70
自引率
11.10%
发文量
59
审稿时长
1 months
期刊介绍: Zoological Science is published by the Zoological Society of Japan and devoted to publication of original articles, reviews and editorials that cover the broad field of zoology. The journal was founded in 1984 as a result of the consolidation of Zoological Magazine (1888–1983) and Annotationes Zoologicae Japonenses (1897–1983), the former official journals of the Zoological Society of Japan. Each annual volume consists of six regular issues, one every two months.
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