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<p>Geometric morphometrics (GM) is a series of methods that enables the quantitative analysis of shape by analysing landmarks. It is widely used to investigate morphological variation in both vertebrates and invertebrates. These methods are commonly applied to infer taxonomic affinities in wild bees, as they are easier, cheaper and less destructive than chemical and molecular analyses, while the characters are preserved in collections over time. However, GM has not yet been tested in the parasitic genus <i>Nomada</i> Scopoli, 1770 which is a genus of wild bees that mainly parasitize the nests of <i>Andrena</i> Fabricius, 1775 in a wide variety of environments. Here we demonstrate that wing morphometry can locally differentiate <i>Nomada</i> species, including the near cryptic <i>panzeri</i>-group, represented by <i>Nomada flava</i> Panzer, 1798 and <i>Nomada panzeri</i> (Lepeletier, 1841). Geometric morphometrics further confirms its effectiveness in distinguishing bees at the subgeneric level. Finally, a sexual dimorphism in wing shape and size is observed in several species.</p>

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Species discrimination in the parasitic bee genus Nomada based on wing morphometrics (Hymenoptera: Apoidea: Apidae)

  • 期刊论文

  • 发表日期：

    2026年1月29日

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  • Frédéric Carion,
  • Guillaume Ghisbain,
  • Maxence Gérard

摘要

Geometric morphometrics (GM) is a series of methods that enables the quantitative analysis of shape by analysing landmarks. It is widely used to investigate morphological variation in both vertebrates and invertebrates. These methods are commonly applied to infer taxonomic affinities in wild bees, as they are easier, cheaper and less destructive than chemical and molecular analyses, while the characters are preserved in collections over time. However, GM has not yet been tested in the parasitic genus Nomada Scopoli, 1770 which is a genus of wild bees that mainly parasitize the nests of Andrena Fabricius, 1775 in a wide variety of environments. Here we demonstrate that wing morphometry can locally differentiate Nomada species, including the near cryptic panzeri-group, represented by Nomada flava Panzer, 1798 and Nomada panzeri (Lepeletier, 1841). Geometric morphometrics further confirms its effectiveness in distinguishing bees at the subgeneric level. Finally, a sexual dimorphism in wing shape and size is observed in several species.