Addressing taxonomic shortfalls in Neotropical gastrotrichs: a new genus and species of freshwater Gastrotricha (Chaetonotida: Paucitubulatina) from Brazil.

IF 1.8 2区生物学 Q3 EVOLUTIONARY BIOLOGY

Invertebrate Systematics Pub Date : 2025-05-01 DOI:10.1071/IS25003

Axell K Minowa, Alexander Kieneke, Maria Balsamo, Loretta Guidi, André R S Garraffoni

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引用次数: 0

Abstract

Freshwater meiofauna in the Neotropics remain vastly understudied, and many species are yet to be discovered due to sampling biases and methodological constraints. In this study, we describe Carianotus dives gen. nov., sp. nov., a new genus and species within Chaetonotidae (Chaetonotida: Paucitubulatina) from Brazil. This species, found in several regions spanning over 3000-km linear distance, features a unique set of morphological features, importantly a distinctive crest of five lanceolate-leaf-shaped spines deriving from small basal scales on the anterior dorsal head. The integrative description is based on light and scanning electron microscopy and molecular phylogenetic analyses of concatenated 18S and 28S rDNA sequences. Our analyses suggest the phylogenetic placement of Carianotus gen. nov. within a paraphyletic branch of Chaetonotus , with spined Chaetonotus lineages and spineless species of Lepidodermella . This research highlights the importance of integrative taxonomy in uncovering hidden biodiversity within the Neotropical region, and demonstrates the still underexplored status of the freshwater meiofauna of Brazil, with many species yet to be discovered. ZooBank: urn:lsid:zoobank.org:pub:D37B6DAB-6E0C-4D8B-B956-D29C066AA284.

查看原文本刊更多论文

解决新热带胃虫分类上的不足：巴西淡水胃虫（毛亚纲：Paucitubulatina）一新属和种。

新热带地区的淡水小型动物研究仍然非常不足，由于采样偏差和方法限制，许多物种尚未被发现。本文报道了巴西毛藻科（毛藻目：Paucitubulatina）新属新种Carianotus dives gen. nov., sp. nov.。这一物种分布在跨越3000公里线性距离的几个地区，具有独特的形态学特征，重要的是在头部前背的小基底鳞片上有五个披针形叶状刺的独特冠。综合描述是基于光和扫描电子显微镜和分子系统发育分析的串联18S和28S rDNA序列。我们的分析表明，Carianotus gen. 11 .的系统发育位置在毛纲的一个副纲分支中，有刺的毛纲谱系和无刺的鳞翅目物种。本研究强调了综合分类学在揭示新热带地区隐藏的生物多样性方面的重要性，并表明巴西淡水微量动物群仍未被充分开发，有许多物种尚未被发现。ZooBank: urn: lsid zoobank.org:酒吧:D37B6DAB-6E0C-4D8B-B956-D29C066AA284。

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来源期刊

Invertebrate Systematics 生物-动物学

CiteScore

4.30

自引率

9.10%

发文量

审稿时长

>12 weeks

期刊介绍： Invertebrate Systematics (formerly known as Invertebrate Taxonomy) is an international journal publishing original and significant contributions on the systematics, phylogeny and biogeography of all invertebrate taxa. Articles in the journal provide comprehensive treatments of clearly defined taxonomic groups, often emphasising their biodiversity patterns and/or biological aspects. The journal also includes contributions on the systematics of selected species that are of particular conservation, economic, medical or veterinary importance. Invertebrate Systematics is a vital resource globally for scientists, students, conservation biologists, environmental consultants and government policy advisors who are interested in terrestrial, freshwater and marine systems. Invertebrate Systematics is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science.