Targeted DNA sequencing and morphology show that Psidium decussatum and P. salutare are distinct species
DOI:
https://doi.org/10.70782/heringeriana.v19ib.918067Palavras-chave:
high-throughput sequencing, Myrtaceae, phylogenomicsResumo
The Psidium salutare complex comprises a widely distributed group of two species, P. laruotteanum and P. salutare, the latter with five varieties. One of these varieties, Psidium salutare var. decussatum (basionym, P. decussatum) was used for a subgroup of P. salutare, here called “narrow-leaved salutare”. With better knowledge of the type of P. decussatum and modern collections, together with high-throughput sequencing and target enrichment with the Angiosperm 353 probe set, we compare Psidium decussatum to P. salutare (specifically the “narrow-leaved salutare” form) and other species of Psidium. Herbarium specimen analysis demonstrates that the names P. decussatum and P. salutare var. decussatum have often been erroneously applied to specimens of taxa other than P. decussatum or “narrow-leaved salutare”. Comparison of DNA of specimens of "narrow-leaved salutare” and the true P. decussatum confirm that these taxa are indeed distinct and for now, “narrow-leaved salutare” is considered an extreme morphotype of P. salutare. Here we re-circumscribe Psidium decussatum and present an identification key, along with images of relevant specimens.
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Copyright (c) 2025 Lázaro Henrique Soares de Moraes Conceição, Amélia Carlos Tuler, Eve J. Lucas, Alice Merrall, Olivier Maurin, Leslie R. Landrum

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