ArticleAnnals of botany2025
Integrating datasets from herbarium specimens and images to treat a Neotropical myrtle species complex.
Article in Annals of botany, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- Automated extraction of leaf mass per area from digitized herbarium specimens.The New phytologist · 2026Article
- Making the most of herbaria. A commentary on 'Integrating datasets from herbarium specimens and images to treat a Neotropical myrtle species complex'.Annals of botany · 2025Article
- Synopsis of the genusPhytoKeys · 2025Article
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Abstract
BACKGROUND AND
aimsHerbaria are the most important source of information for plant taxonomic work. Resources and technologies available today, such as digitized collections and herbarium DNA sequencing, can help accelerate taxonomic decisions in challenging plant groups. Here we employ an integrative methodology relying exclusively on herbarium specimens to investigate species boundaries in the Neotropical Myrcia neoobscura complex (Myrtaceae).
methodsWe collected morphometric data from high-resolution images of herbarium sheets and analysed them using hierarchical clustering. We posteriorly tested the obtained morpho-groups with phylogenomics using the Angiosperms353 probe kit. We also gathered phenological and geographical information from specimen labels and built phenological histograms and ecological niche models to investigate ecological differences amongst taxa. KEY
resultsCurrent circumscriptions of Myrcia arenaria, Myrcia neoglabra and Myrcia neoregeliana are confirmed in this study. Conversely, the four pieces of evidence together support Calyptranthes langsdorffii var. grandiflora, Marlierea regeliana var. parviflora and Marlierea warmingiana as separate from Myrcia marliereana, Myrcia neoriedeliana and Myrcia neoobscura, respectively, contrary to arrangements proposed by previous authors. Integrated analyses also support separation between Myrcia excoriata and two similar, undescribed taxa.
conclusionsOur data reveal the need for major changes in the systematics of the group, with recognition of 12 species. The successful delivery of our study aims was possible due to obtaining robust, high-quality data from museum specimens. We emphasize the importance of maintaining botanical collections physically and digitally available for taxonomic work and advocate their use to accelerate taxonomic solutions of tropical species complexes hollistically. This is urgent, given the paucity of funds for fieldwork and unprecedented rates of habitat loss in the tropics.
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