Shape variation in the snapping claw of Alpheus Fabricius, 1898 (Decapoda: Alpheidae): A geometric morphometrics approach

IF 1.1 4区 生物学 Q4 ANATOMY & MORPHOLOGY Acta Zoologica Pub Date : 2024-06-27 DOI:10.1111/azo.12511
Whandenson M. Nascimento, Alexandre O. Almeida, Allysson P. Pinheiro
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Abstract

The evolutionary success of the Alpheus snapping shrimps is linked to their snapping claws, which were considered the key innovation in the evolution of these shrimps. However, many aspects of the evolution of snapping claws remain unknown. We evaluate the degree of intra‐ and interspecific variation in the shape of the snapping claw in different snapping shrimp Alpheus species. For this, we used a geometric morphometric tool. We investigated the variation in snapping claw shape from two perspectives — interspecific variation and sexual shape dimorphism — in three species: Alpheus angulosus, A. carlae, and A. estuariensis, from three locations along the southern coast of Bahia state in northeastern Brazil. Our results revealed interspecific variation in the shape of the snapping claw among A. angulosus, A. carlae, and A. estuariensis. In addition, sexual shape dimorphism was confirmed in A. angulosus and A. carlae. However, in A. estuariensis, our results reveal sexual monomorphism in the snapping claw. Our findings highlight the importance of considering both ecological context and phylogenetic relationships when analysing the morphology of the snapping claw in Alpheus snapping shrimps. We suggest further investigations to better understand the interspecific variation and sexual dimorphism in snapping claws and their implications for the evolutionary history of these shrimps.
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Alpheus Fabricius, 1898 (Decapoda: Alpheidae) 鳄爪的形状变化:几何形态计量学方法
阿尔卑斯鳄的进化成功与它们的鳄爪有关,鳄爪被认为是这些虾进化过程中的关键创新。然而,关于鳄爪进化的许多方面仍然未知。我们评估了不同种类的阿尔普斯(Alpheus)对虾在种内和种间的鳄爪形状变异程度。为此,我们使用了一种几何形态计量工具。我们从两个角度--种间变异和性形二态--研究了三个物种的鳄爪形状变异:我们从两个角度研究了巴西东北部巴伊亚州南部沿海三个地点的三个物种:Alpheus angulosus、A. carlae 和 A. estuariensis 的甲鱼爪形状的变化。我们的研究结果表明,A. angulosus、A. carlae 和 A. estuariensis 的鳄爪形状存在种间差异。此外,A. angulosus 和 A. carlae 的性状二形性也得到了证实。然而,我们的研究结果表明,河口蛙的鳄爪具有性单态性。我们的发现强调了在分析阿尔卑斯鳄的鳄爪形态时考虑生态环境和系统发育关系的重要性。我们建议开展进一步研究,以更好地了解鳄爪的种间变异和性二态性及其对这些虾类进化史的影响。
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来源期刊
Acta Zoologica
Acta Zoologica 生物-动物学
CiteScore
2.90
自引率
8.30%
发文量
35
审稿时长
>12 weeks
期刊介绍: Published regularly since 1920, Acta Zoologica has retained its position as one of the world''s leading journals in the field of animal organization, development, structure and function. Each issue publishes original research of interest to zoologists and physiologists worldwide, in the field of animal structure (from the cellular to the organismic level) and development with emphasis on functional, comparative and phylogenetic aspects. Occasional review articles are also published, as well as book reviews.
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