Morphological and molecular support for Amphithrax verrucosus (H. Milne Edwards, 1832) and Amphithrax aculeatus (Herbst, 1790) (Crustacea, Decapoda, Brachyura) as valid species

IF 1.6 2区生物学 Q2 ZOOLOGY Zoosystematics and Evolution Pub Date : 2024-01-26 DOI:10.3897/zse.100.109192

Nadeshinie Parasram, William Santana, Yvonne Vallès, A. Windsor, Henri Vallès

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Abstract

The large degree of morphological variations, particularly amongst juveniles, has led to inconsistencies in the literature regarding the taxonomic status of Amphithrax aculeatus (Herbst, 1790) and Amphithrax verrucosus (H. Milne Edwards, 1832). As a result of recent biodiversity sampling initiatives in Barbados, West Indies, multiple specimens of Amphithrax aculeatus and A. verrucosus have been collected. This has prompted us to undertake a thorough reassessment of their morphological and molecular characteristics. Moreover, morphological differences in the carapace, antennae, chelipeds, pereopods and the male first gonopod (G1) supports A. aculeatus and A. verrucosus as separate species. Molecular phylogenetic analysis, based on newly-generated sequences of the 12S rRNA, 16S rRNA and ITS-1 genes also shows that A. verrucosus is a separate species and sister taxa to A. aculeatus. The total number of species within the genus Amphithrax is now brought to eleven. However, our molecular analysis also shows that the taxonomic placement of Amphithrax armatus (Saussure, 1853) within Amphithrax is questionable.

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从形态学和分子学角度支持Amphithrax verrucosus (H. Milne Edwards, 1832) 和 Amphithrax aculeatus (Herbst, 1790) (Crustacea, Decapoda, Brachyura) 为有效种

Amphithrax aculeatus（Herbst，1790 年）和 Amphithrax verrucosus（H. Milne Edwards，1832 年）的形态差异很大，尤其是幼体之间的差异，导致文献中关于它们的分类地位不一致。由于最近在西印度群岛巴巴多斯开展的生物多样性采样活动，我们采集到了多份 Aphithrax aculeatus 和 A. verrucosus 的标本。这促使我们对它们的形态和分子特征进行了彻底的重新评估。此外，Amphithrax aculeatus 和 A. verrucosus 在甲壳、触角、螯足、围足和雄性第一节足（G1）上的形态差异也支持将它们作为独立的物种。基于新产生的 12S rRNA、16S rRNA 和 ITS-1 基因序列的分子系统学分析也表明，疣螈是一个独立的种，是疣螈的姊妹类群。至此，Amphithrax 属的物种总数达到 11 个。然而，我们的分子分析也表明，Amphithrax armatus（Saussure，1853 年）在 Amphithrax 属中的分类地位值得商榷。

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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.