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Dryad

Data from: Morphological and genetic evidence for the Stigmatodon goniorachis complex (Tillandsioideae, Bromeliaceae) reveals a new species on inselbergs in the Brazilian Atlantic Forest

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Jan 10, 2025 version files 18.86 KB

Abstract

This study evaluated the morphological variation and genetic structure of seven natural populations of the Stigmatodon goniorachis complex (Bromeliaceae) endemic to vertical faces of inselbergs in the Brazilian Atlantic Forest. A cluster analysis and Principal Component Analysis (PCA) corroborated the existence of four clearly separated species, S. brassicoides, S. costae, S. francae, and S. goniorachis, and unveiled two distinct morphological groups in the S. goniorachis populations. The main components of variation revealed by PCA analysis were: inflorescence peduncle diameter, floral bract length, and hypanthium length. Both morphological and genetic analyses indicated two distinct groups among the four populations initially identified as S. goniorachis, which led to the recognition of a new species described here, Stigmatodon carioca.  Besides the description of the new species, we present a comparative study that allows the morphological differentiation of the five species.