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<p>This study presents a morphological comparison of shells from four limpet species (<i>Patella caerulea</i>,<i> Patella rustica</i>,<i> Patella ulyssiponensis</i>, and <i>Siphonaria pectinata</i>) collected from five Tunisian rocky coasts during the period June-August 2021. Two geometric morphometric approaches were used to assess inter- and intraspecific morphological variations: The Generalized Procrustes superposition and Fourier elliptic analysis. The findings showed that <i>P. rustica</i> had a higher shell compressed in the antero-posterior direction with an apex positioned more towards the center, while <i>P. caerulea</i> and <i>P. ulyssiponensis</i> were flatter with apices closer to the anterior end and revealed shell shape patterns that seem to be associated with the Bizerte Grottes and Salakta sites. As for <i>S. pectinata</i>, it diverged from the species of the genus <i>Patella</i> by a more enlarged base, a more conical shell, and a more central apex. Our data confirmed that limpets exhibit substantial morphological variability, which is likely associated with spatial variation among stations.</p>

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Morphological Characterization of Four Limpet Species from the Rocky Coasts of Tunisia

  • 期刊论文

  • 发表日期：

    2026年2月21日

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  • Maram Azizi,
  • Wafa Boulajfene,
  • Ahmed Souissi,
  • Sarra Ben Tanfous,
  • Lilia Bahri-Sfar

摘要

This study presents a morphological comparison of shells from four limpet species (Patella caerulea, Patella rustica, Patella ulyssiponensis, and Siphonaria pectinata) collected from five Tunisian rocky coasts during the period June-August 2021. Two geometric morphometric approaches were used to assess inter- and intraspecific morphological variations: The Generalized Procrustes superposition and Fourier elliptic analysis. The findings showed that P. rustica had a higher shell compressed in the antero-posterior direction with an apex positioned more towards the center, while P. caerulea and P. ulyssiponensis were flatter with apices closer to the anterior end and revealed shell shape patterns that seem to be associated with the Bizerte Grottes and Salakta sites. As for S. pectinata, it diverged from the species of the genus Patella by a more enlarged base, a more conical shell, and a more central apex. Our data confirmed that limpets exhibit substantial morphological variability, which is likely associated with spatial variation among stations.