A new endemic, Pannaria oregonensis, replaces two misapplied names in the Pacific Northwest of North America
- Author:
- McCune B., Schultz M., Fennell T., Passo A. & Rodriguez J.M.
- Year:
- 2022
- Journal:
- Bryologist
- Pages:
- 125(1): 170–185
- Url:
- https://doi.org/10.1639/0007-2745-125.1.170
We evaluated the taxonomic status of specimens representing two listed rare species of
Pannaria in the Pacific Northwest, P. rubiginosa and P. rubiginella, based on DNA sequences of recently
collected samples. We combined those data with new sequences for other Pannaria species in North
America and South America as well as all available sequences from the P. rubiginosa and P. lurida groups
plus closely related P. hookeri, based on results from initial analyses. Historically, P. rubiginosa and P.
rubiginella have been separated in the Pacific Northwest based on the paraphenylenediamine (P) reaction
of the cortex versus the medulla. Phylogenetic reconstruction based on ITS sequences demonstrated that
both chemotypes belong to a single well-supported clade, and that it belongs to neither P. rubiginosa nor
P. rubiginella. Instead, the Pacific Northwest material appears to belong to an undescribed species very
similar morphologically to P. rubiginosa, but genetically and geographically distinct from that species and
with smaller spores. We describe this new species as Pannaria oregonensis, assigning all of the material
from the Pacific Northwest to this taxon, regardless of the location of the Pþreaction. This conclusion is
supported by phylogenetic analysis of co-occurring populations of different chemotypes. We recommend
removing P. rubiginella from the North American checklist. We also provide a revised key to the North
American species of Pannaria, based on our current understanding. Furthermore, based on new sampling
of Pannaria species from North and South America, we show a need for revision of the isidiate species of
Pannaria, in particular P. tavaresii in the broad sense.
KEYWORDS. Endangered species, ITS barcode, lichen systematics, lichenized fungi, Pannariaceae, South
America, taxonomy.
- Id:
- 34196
- Submitter:
- zdenek
- Post_time:
- Tuesday, 01 March 2022 12:33