Arachnandra, a new monotypic genus in Tillandsioideae (Bromeliaceae) from the Atlantic Forest in Brazil
- Author(s)
- Elton M. C. Leme, Walter Till, Heidemarie Halbritter, Michael H. J. Barfuss
- Abstract
Arachnandra, a new monotypic genus of Bromeliaceae subtribe Vrieseinae, is described to accommodate a single intriguing species, Arachnandra drepanocarpa, formerly placed in either Tillandsia or Vriesea. This new genus is ecologically and morphologically distinct from the remaining genera of subfamily Tillandsioideae in its unique combination of characters including the lanceolate-acuminate sepals, petals distinctly appendaged, corolla with an open, fan blade-like shape, stamens prostrate on the corolla, pollen sulcus broad, smooth, without prominent ornamental elements, margins moderately distinct, stigma of the conduplicate-patent type, and seeds with a distinctly long basal appendaged and an inconspicuous apical one. Phylogenetic DNA sequence analyses indicate that the individuals of A. drepanocarpa form a highly supported monophyletic group in sister position to Vriesea s.str., with Vriesea and Arachnandra being sister to Stigmatodon, and all three being sister to the clade containing Alcantarea and Waltillia.
- Organisation(s)
- Department of Botany and Biodiversity Research
- External organisation(s)
- Herbarium Bradeanum
- Journal
- Phytotaxa
- Volume
- 693
- Pages
- 1-32
- No. of pages
- 32
- ISSN
- 1179-3163
- DOI
- https://doi.org/10.11646/phytotaxa.693.1.1
- Publication date
- 03-2025
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 106008 Botany, 106042 Systematic botany, 106033 Phylogeny, 106029 Plant morphology
- Keywords
- ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics, Plant Science
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/6de9d877-c26c-4ba6-8a18-6ec737b7639d