When anatomy speaks louder than genes: two new freshwater planarian species (Platyhelminthes: Dugesiidae) from Argentine Patagonia

IF 1.3 3区生物学 Q2 ZOOLOGY

Zoologischer Anzeiger Pub Date : 2025-11-01 Epub Date: 2025-10-14 DOI:10.1016/j.jcz.2025.10.004

Lisandro Negrete , Agustina Zivano , Gonzalo Vargas , Francisco Brusa

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引用次数: 0

Abstract

The Dugesiidae is a family of freshwater planarians (Platyhelminthes: Tricladida), which includes 15 genera, with about 250 valid species. In particular, the genus Girardia encompasses 59 species, mainly distributed in the Neotropics. In this paper, we describe two new species of the genus Girardia, viz. Girardia limayana Negrete & Brusa sp. nov. and Girardia ventriphalla Negrete & Brusa sp. nov., found in different water bodies from Argentine Patagonia. We also studied specimens of Girardia tomasi, which allowed expanding its geographic distribution. The description of the new taxa focuses on their internal anatomy, mainly related to the copulatory apparatus, which was studied by serial histological sections. Partial sequences of mitochondrial cytochrome oxidase c subunit I (Cox-1) were also obtained to describe the freshwater planarians within a taxonomic integrative approach, including species delimitation approaches (ASAP and mPTP). The mPTP method recovered the three species herein studied, but ASAP, in its best score, failed to delimit G. ventriphalla sp. nov. from G. tomasi. Considering these approaches, along with the anatomical analyses, we decided to keep these latter species as different entities.

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当解剖学比基因更有说服力时：来自阿根廷巴塔哥尼亚的两个新的淡水涡虫物种（扁形蠕虫：Dugesiidae）

淡水涡虫科是淡水涡虫科的一个科（扁形纲：三虫纲），共有15属，约250种。特别地，吉拉迪亚属包括59种，主要分布在新热带地区。本文描述了在阿根廷巴塔哥尼亚不同水体中发现的Girardia limayana Negrete &； Brusa sp. 11和Girardia ventriphalla Negrete &； Brusa sp. 11两种Girardia属新种。我们还研究了吉拉迪亚的标本，这使得它的地理分布得以扩大。对新分类群的描述主要集中在其内部解剖，主要与交配器有关，并通过连续的组织学切片进行了研究。获得了线粒体细胞色素氧化酶c亚基I （Cox-1）的部分序列，并采用综合分类方法，包括种划分方法（ASAP和mPTP）来描述淡水原虫。mPTP方法恢复了本文研究的三个物种，但ASAP在最佳分数下未能将G. ventriphalla sp. 11 .与G. tomasi分开。考虑到这些方法，连同解剖分析，我们决定保留后这些物种作为不同的实体。

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

Zoologischer Anzeiger 生物-动物学

CiteScore

2.80

自引率

7.10%

发文量

审稿时长

>12 weeks

期刊介绍： Zoologischer Anzeiger - A Journal of Comparative Zoology is devoted to comparative zoology with a special emphasis on morphology, systematics, biogeography, and evolutionary biology targeting all metazoans, both modern and extinct. We also consider taxonomic submissions addressing a broader systematic and/or evolutionary context. The overall aim of the journal is to contribute to our understanding of the organismic world from an evolutionary perspective. The journal Zoologischer Anzeiger invites suggestions for special issues. Interested parties may contact one of the editors.