Whandenson M. Nascimento, Alexandre O. Almeida, Allysson P. Pinheiro
{"title":"Shape variation in the snapping claw of Alpheus Fabricius, 1898 (Decapoda: Alpheidae): A geometric morphometrics approach","authors":"Whandenson M. Nascimento, Alexandre O. Almeida, Allysson P. Pinheiro","doi":"10.1111/azo.12511","DOIUrl":null,"url":null,"abstract":"The evolutionary success of the <jats:italic>Alpheus</jats:italic> 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 <jats:italic>Alpheus</jats:italic> 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: <jats:italic>Alpheus angulosus</jats:italic>, <jats:italic>A. carlae,</jats:italic> and <jats:italic>A. estuariensis</jats:italic>, 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 <jats:italic>A. angulosus</jats:italic>, <jats:italic>A. carlae,</jats:italic> and <jats:italic>A. estuariensis</jats:italic>. In addition, sexual shape dimorphism was confirmed in <jats:italic>A. angulosus</jats:italic> and <jats:italic>A. carlae</jats:italic>. However, in <jats:italic>A. estuariensis</jats:italic>, 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 <jats:italic>Alpheus</jats:italic> 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.","PeriodicalId":50945,"journal":{"name":"Acta Zoologica","volume":null,"pages":null},"PeriodicalIF":1.1000,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Zoologica","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1111/azo.12511","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ANATOMY & MORPHOLOGY","Score":null,"Total":0}
引用次数: 0
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.
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.