Heads up: Some or all of the identifications affected by this split may have been replaced with identifications of Spiranthes cernua. This happens when we can't automatically assign an identification to one of the output taxa. Review identifications of Spiranthes cernua 120404

Taxonomic Split 71331 (Committed on 02-10-2020)

From Pace & Cameron 2017: Two major obstacles to quantifying biodiversity are reticulate evolution and the evolution of genetically distinct but morphologically overlapping cryptic species. The Spiranthes cernua species complex (Orchidaceae) has defied satisfactory species delineation, often described as intractable, due to morphological variability within species, overall morphological similarity between species, possible cryptic speciation, and suspected hybridization. We utilized low copy nuclear, nuclear ribosomal, and chloroplast molecular phylogenetic datasets, in addition to expansive field and herbarium research, to clarify long-standing questions regarding species boundaries within the S. cernua species complex. Our results justify:

1) narrowing the concept of S. cernua [In its new strict sense, S. cernua occurs from the Coastal Plain to the eastern and southern Appalachian Mountains, southern Interior Lowlands, and Cumberland Plateau];

2) the description of a new cryptic species, Spiranthes arcisepala;

3) the description of a new geographically restricted species of cryptic and ancient hybrid origin, Spiranthes niklasii (S. cernua × S. ovalis);

4) a new combination for a biogeographically specific cryptic species of ancient hybrid origin, Spiranthes incurva (S. cernua × S. magnicamporum); and

5) the description of a new localized hybrid, Spiranthes ×kapnosperia (S. cernua × S. ochroleuca).

We also propose formal synonymization of federally endangered Spiranthes parksii under S. cernua s. s.

Our research clarifies species boundaries within this challenging group, and is the first to use molecular phylogenetic data to support hybridization as an evolutionary force within the S. cernua species complex."

For range maps, see Figure 14 in: Pace, M. C., & Cameron, K. M. (2017). The Systematics of the Spiranthes cernua Species Complex (Orchidaceae): Untangling the Gordian Knot. Systematic Botany, 42(4), 640–669. doi:10.1600/036364417x696537

See more info and iNat discussion at: https://www.inaturalist.org/flags/269211

For my own interest, S. cernua sensu lato started with 1714 observations (and just a small handful of IDs had accidentally already been added to output taxa.)

Added by bouteloua on February 10, 2020 06:37 PM | Committed by bouteloua on February 10, 2020
split into


@loarie I get a 404 trying to commit this. Can you take a look?

Posted by bouteloua over 4 years ago


Posted by loarie over 4 years ago

I'll try to make it so that doesn't fail silently but the validation error is "Spiranthes cernua must have a parent that is active or be the output of a draft taxon change to be active itself" which is because https://www.inaturalist.org/taxa/773385-Spiranthes-cernua descends from an inactive complex

Posted by loarie over 4 years ago

Ah ok, thanks! Thought it might activate the parent on committing.

Posted by bouteloua over 4 years ago


Posted by wdvanhem over 4 years ago

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