Integrative description of a new species of Dugesia (Platyhelminthes, Tricladida, Dugesiidae) from southern China, with its complete mitogenome and a biogeographic evaluation

IF 1.6 2区生物学 Q2 ZOOLOGY

Zoosystematics and Evolution Pub Date : 2024-02-16 DOI:10.3897/zse.100.114016

Ying Zhu, JiaJie Huang, R. Sluys, Yi Liu, Ting Sun, AN-TAI Wang, Yu Zhang

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引用次数: 0

Abstract

A new species of freshwater flatworm of the genus Dugesia from Guangdong Province in China is described through an integrative approach, including molecular and morphological data, as well as mitochondrial genome analysis. The new species, Dugesia ancoraria Zhu & Wang, sp. nov., is characterised by: (a) a highly asymmetrical penis papilla, provided with a hunchback-like dorsal bump; (b) a short duct between seminal vesicle and ejaculatory duct; and (c) a postero-ventral course of the ejaculatory duct, which opens to the exterior at the subterminal, ventral part of the penis papilla. The molecular phylogenetic tree obtained from the concatenated dataset of four DNA markers (18S rDNA, ITS-1, 28S rDNA, COI) facilitated determination of the phylogenetic position of the new species, which shares a sister-group relationship with a small clade, comprising D. notogaea Sluys & Kawakatsu, 1998 from Australia and D. bengalensis Kawakatsu, 1983 from India. The circular mitogenome of the new species is 17,705 bp in length, including 12 protein coding genes, two ribosomal genes, and 22 transfer RNAs. Via analysis of gene order of mitochondrial genomes, the presently available pattern of mitochondrial gene rearrangement in the suborder Continenticola is discussed.

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综合描述来自中国南方的一种新的 Dugesia（扁形动物，三链目，Dugesiidae），及其完整的有丝分裂基因组和生物地理学评价

通过分子和形态学数据以及线粒体基因组分析等综合方法，描述了产自中国广东省的淡水扁形虫属的一个新物种。新物种 Dugesia ancoraria Zhu & Wang, sp：(a) 阴茎乳头高度不对称，背侧有一驼背状突起；(b) 精囊与射精管之间有一短导管；(c) 射精管后外侧走向，在阴茎乳头腹侧近端向外开口。从四个 DNA 标记（18S rDNA、ITS-1、28S rDNA、COI）的数据集中获得的分子系统发生树有助于确定该新物种的系统发生位置，它与一个小支系（包括澳大利亚的 D. notogaea Sluys & Kawakatsu，1998 年和印度的 D. bengalensis Kawakatsu，1983 年）属于姊妹群关系。新物种的环形有丝分裂基因组长度为 17 705 bp，包括 12 个蛋白质编码基因、2 个核糖体基因和 22 个转移 RNA。通过对线粒体基因组基因顺序的分析，讨论了目前大陆虫亚目线粒体基因重排的模式。

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

Zoosystematics and Evolution ZOOLOGY-

CiteScore

3.50

自引率

5.00%

发文量

审稿时长

16 weeks

期刊介绍： Zoosystematics and Evolution, formerly Mitteilungen aus dem Museum für Naturkunde in Berlin, is an international, open access, peer-reviewed life science journal devoted to whole-organism biology. It publishes original research and review articles in the field of Metazoan taxonomy, biosystematics, evolution, morphology, development and biogeography at all taxonomic levels. The journal''s scope encompasses primary information from collection-related research, taxonomic descriptions and discoveries, revisions, annotated type catalogues, aspects of the history of science, and contributions on new methods and principles of systematics. Articles whose main topic is ecology, functional anatomy, physiology, or ethology are only acceptable when of systematic or evolutionary relevance and perspective.