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pteridogroup / ppg

Pteridophyte Phylogeny Group (PPG) taxonomic system for ferns and lycophytes
https://pteridogroup.github.io/
MIT License
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Resurrection of Polydictyum from a synonym of Tectaria [PASSED] #67

Open gonggashan88 opened 10 months ago

gonggashan88 commented 10 months ago

Author(s) of proposal

Li-Bing Zhang, Liang Zhang

Name of taxon

Polydictyum

Rank of taxon

Genus

Approximate number of species affected

5

Description of change

Resurrection of Polydictyum C.Presl (1851) from a synonym of Tectaria Cav. (1799).

Reason for change

Polydictyum C.Presl (1851) has been treated as a synonym of Tectaria by various earlier authors Copeland, 1907; Tardieu-Blot & Ching, 1936; Tryon & Tryon, 1982; Holttum, 1991) and tentatively by PPG I (2016). Molecular data showed that it is not even closely related to Tectaria but is sister to Pteridrys with strong support (Dong et al., 2018; Zhou et al., 2018), an Old World genus with ca. 24 species (Zhou & Zhang, 2019). Polydictyum + Pteridrys together are strongly supported as sister to Malaifilix + Draconopteris.

Morphologically, Polydictyum is characterized by having a combination of characters, such as creeping rhizome, a rachis without wings, anastomosing veins, sinuses lacking teeth, and rounded indusia.

Polydictyum contains about 3-5 species currently known in central Vietnam, China (Hainan Island), and Malesia (the Philippines to Fiji)(Dong et al., 2018; Zhou et al., 2018).

Reference(s) for publication of the name

Dong S-Y, CW Chen, S-S Tan, H-G Zhao, Z-Y Zuo, Y-S Chao, Y-H Chang. 2018. New insights on the phylogeny of Tectaria (Tectariaceae), with special reference to Polydictyum as a distinct lineage. Journal of Systematics and Evolution 56: 139–147.

Zhou, X-M, L Zhang, NT Lu, X-F Gao, L-B Zhang. 2018. Pteridryaceae: A new fern family of Polypodiineae (Polypodiales) including taxonomic treatments. Journal of Systematics and Evolution 56: 148–173.

Zhou, X-M, L-B Zhang. 2019. A monograph of the fern genus Pteridrys (Pteridryaceae). Systematic Botany 44(2): 243–273.

List the numbers of any related issues

No response

Code of Conduct

joelnitta commented 10 months ago

Links to papers:

joelnitta commented 8 months ago

This proposal was voted on during PPG Ballot 8 (voting period February 2024). A total of 70 votes were cast. There were 61 'Yes' votes (87.1%) and 9 'No' votes (12.9%). The proposal passes.