Content Author Object Flagger Flag Created Reason Resolved by Resolution
resurrection fern (Pleopeltis polypodioides) ryan84 Fri, 28 Sep 2018 14:41:30 +0000

This species is now restricted to the Florida Keyshttp://www.florida.plantatlas.usf.edu/Plant.aspx?id=3445 & http://florida.plantatlas.usf.edu/Plant.aspx?ID=4877

bouteloua

committed taxon split

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Pleopeltis polypodioides should probably be split into a new taxon P. polypodioides (sensu stricto) and P. michauxiana, but unfortunately fern taxonomy on iNaturalist--and elsewhere--is a bit of a mess.

iNaturalist generally defers to Plants of the World Online (POWO, plantsoftheworldonline.org) for accepted vascular plant taxonomy. But the important caveats with the current policy include ignoring genera that start with the letter P, as well as ferns. So we're at a standstill at this moment.

(Also, if the iNat community disagrees with POWO, we can flag the taxon, have a conversation about it, and consider an explicit deviation from POWO on a case-by-case basis. In some cases the iNaturalist community has pointed out errors with POWO, which POWO will incorporate into their site in their next round of updates.)

You can read more about vascular plant taxonomic policy on iNaturalist at this journal post.

Posted by bouteloua almost 2 years ago (Flag)
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@bouteloua

FWIW, with POWO not covering ferns at the moment, I believe this taxon is only covered by one of our usual regional floras, Weakley, which does accept it as valid.

I've been studiously avoiding this particular swap because of the work involved. Do you have a pointer to documentation for auto-splitting based on a range map? I didn't realize we could do that.

@mangum @ryan84 if it's relatively simple, I can try doing that taxon split; IIRC, P. michauxiana only overlaps with the rest of the P. polypodioides aggregate in the Florida Keys and Mexico.

Posted by choess almost 2 years ago (Flag)
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I've been doing it manually which is a little time consuming. I finished North and South Carolina.

Posted by ryan84 almost 2 years ago (Flag)
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I've been pitching in with some manual work as well, but I agree, it is a little time consuming.

Posted by mangum almost 2 years ago (Flag)
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From the curator guide:

Splits: When all of the output taxa have atlases we can automatically choose the right output taxon for a record with a location, e.g. if Observation 1 is in Belgium and Output Taxon A occurs in Belgium but Output Taxon B does not, we can just add new identifications of Output Taxon A to Observation 1. However...Where output atlases overlap, or if there's ambiguity due to output taxa without atlases, we fall back to adding identifications of the closest taxon that contains all of the output taxa, so if the input is Woofer and the outputs are Canis and Vulpes, all IDs of Woofer will be replaced with IDs of Canidae, b/c it contains all of the outputs and should be implied by all of the previous IDs. This is a little weird, we know, but it makes it easier for people to add new identifications to shift the community ID correctly. [more at that link]

Scott has this longer document that details more information about splits (page 18+).

Taxa:

[old] P. polypodioides sensu lato (#84022) - no atlas needed
[new] P. polypodioides sensu stricto (#782079) - Atlas
P. michauxiana (#698726) - Atlas

Steps:

"Rough consensus" that we're ok with Pleopeltis michauxiana being its own thing. I am.
Refine the 2 atlases linked above (more info on atlases here)
Draft the taxon split, maybe have someone review it for any issues
Commit the split
Review/transfer common names, synonyms, taxon photos, conservation statuses

Posted by bouteloua almost 2 years ago (Flag)
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Oh--these are the accepted infraspecifics of P. polypodioides s.s. per POWO:

Pleopeltis polypodioides var. aciculare
Pleopeltis polypodioides var. burchellii
Pleopeltis polypodioides var. knoblochiana
Pleopeltis polypodioides var. polypodioides

They treat the taxon "ecklonii" as a species, Pleopeltis ecklonii, but it's infraspecific to P. polypodioides on iNaturalist. So we'd need to figure out what to do with that taxon on iNaturalist, before the split, as well.

Posted by bouteloua almost 2 years ago (Flag)
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Sounds like another can of worms.

Posted by ryan84 almost 2 years ago (Flag)
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Yeah, I guess it would be a pain to have several different Pleopeltis polypodioides taxa of various sensu stricto gradations if (when?) all the species listed in Sprunt 2010 get validly published one by one.

Posted by bouteloua almost 2 years ago (Flag)
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It's probably not a big deal for us in practice. All the unsplit stuff at the moment is Mexican-Caribbean-Central American, where
a) we have relatively few observations, due to our observer demographics
b) we can rarely identify Pleopeltis down to species level anyway due to the diversity of species there and the lack of detail in photographs

So I'm OK with us treating the remainder of the P. polypodioides aggregate (less ecklonii & michauxiana) as a single species for now.

Posted by choess almost 2 years ago (Flag)
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OK, I've done my best with the atlases, although the Caribbean range of the remaining P. polypodioides aggregate and limits within Mexico of P. michauxiana could use some work.

@monifern, do you know anything about this that isn't in the literature yet?

Posted by choess almost 2 years ago (Flag)
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If you don't mind, let's concentrate future discussion here:
https://www.inaturalist.org/posts/19073-splitting-pleopeltis-polypodioides-resurrection-ferns

Posted by bouteloua almost 2 years ago (Flag)

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