joelnitta
commented
1 year ago This proposal was voted on during PPG Ballot 3 (voting period September 2023). A total of 67 votes were cast. There were 58 'Yes' votes (86.6%) and 9 'No' votes (13.4%). The proposal passes.
Author(s) of proposal
Ashley Field
Name of taxon
Bosmania
Rank of taxon
Genus
Approximate number of species affected
3
Description of change
Testo et al. (2019) introduced the genus Bosmania Testo based on a molecular phylogenetic and morphological appraisal as part of a multi-genus approach to achieving monophyly from a previously paraphyletic Microsorum and Colysis. The abstract of Testo et al. (2019) is reproduced below:
"The taxonomy of the Polypodiaceae subfamily Microsoroideae is highly problematic, especially with respect to the circumscription of the highly variable and non-monophyletic genus Microsorum. Using phylogenetic analyses and morphological evidence, we demonstrate that sixteen taxa typically treated in the genera Microsorum and Colysis are not closely related to those groups and instead belong to three clades that are successive sister groups to the Old-World ant-fern genus, Lecanopteris. We use the available genus name Dendroconche for one of these clades and propose the new genera Bosmania and Zealandia to accommodate the remaining two groups. We provide a description and identify morphological synapomorphies for each of the genera, make new combinations and designate lectotypes where necessary, and present keys and descriptions for all relevant species. We also discuss the evolution of ant-fern associations in the lecanopteroid ferns and highlight the need for additional taxonomic work in the subfamily. The following new combinations are provided: Bosmania lastii, B . leandriana, B . membranacea, Dendroconche ampla, D . latilobata, D . linguiforme, D . sayeri, D . scandens, D . varians, Zealandia novae-zealandiae, Z . powellii, Z . pustulata, Z . pustulata subsp. howensis, and Z . vieillardii."
Reason for change
Multiple studies have shown that Microsorum and Colysis as adopted in PPG I (2016) were paraphyletic. This proposal is directed at achieving monophyly among relevant genera by recognition of three separate new genera for the clades presented by Testo et al. (2019) and also presented by Chen et al. (2020). This proposal should be read in conjunction with proposals for Dendroconche + Lecanopteris s.s. + Zealandia sensu Testo et al. (2019) (#25, #26).
This proposal affects species occurring primarily in Madagascar and South East Asia. It was adopted World Ferns. It was also adopted by the alternative classification for Lecanopteris s.l. presented by Perrie et al. (2021) (#28). No other alternatives have thus far been published.
Reference(s) for publication of the name
Testo W.L., Field A.R., Sessa E.B., Sundue M. (2019) Phylogenetic and Morphological Analyses Support the Resurrection of Dendroconche and the Recognition of Two New Genera in Polypodiaceae Subfamily Microsoroideae Systematic Botany 44(4): 1–16.
See also:
Chen C-C, Hyvönen J, Schneider H. 2020. Exploring phylogeny of the microsoroid ferns (Polypodiaceae) based on six plastid DNA markers. Molecular Phylogenetics and Evolution 143: 106665.
Field A.R. (2020) Classification and typification of Australian lycophytes and ferns based on Pteridophyte Phylogeny Group classification PPG I. Australian Systematic Botany 33(1): 1–102.
Perrie L.R., Field A.R., Ohlsen D.J., Brownsey P.J. (2021) Expansion of the fern genus Lecanopteris to encompass some species previously included in Microsorum and Colysis (Polypodiaceae) Blumea 66: 242–248.
List the numbers of any related issues
25, #26, #28
Code of Conduct