(Table 2) Collection sites and number of specimens of Usnea subgenus Neuropogon species ...

Usnea species of the Neuropogon group are amongst the most widespread and abundant macrolichens in Antarctic regions. Four principal species, U. antarctica, U. aurantiaco-atra, U. sphacelata and U. subantarctica, have been described on morphological grounds. However, identification to species level...

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Bibliographic Details
Main Authors: Seymour, Fabian A, Crittenden, Peter D, Wirtz, Nora, Øvstedal, Dag O, Dyer, Paul S, Lumbsch, H Thorsten
Format: Dataset
Language:English
Published: PANGAEA 2007
Subjects:
Event label
Latitude of event
Longitude of event
Area/locality
Sampling date
Usnea acromelana
Usnea antarctica
Usnea aurantiacoatra
Usnea sphacelata
Usnea subantarctica
Usnea trachycarpa
Usnea spp.
Research station
Biological sample
Multiple investigations
Jubany
Carlini/Jubany Station
Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158
Antarctic
Antarctic Peninsula
Arctic
The Antarctic
Antarc*
Antarctica
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.858324
https://doi.pangaea.de/10.1594/PANGAEA.858324
Description
Summary:Usnea species of the Neuropogon group are amongst the most widespread and abundant macrolichens in Antarctic regions. Four principal species, U. antarctica, U. aurantiaco-atra, U. sphacelata and U. subantarctica, have been described on morphological grounds. However, identification to species level is often difficult and atypical morphologies frequently arise. Over 400 specimens were collected on the Antarctic Peninsula and Falkland Islands. Both morphological and molecular characters (ITS and RPB1) were used to compare samples to clarify taxonomic relationships. Morphological characteristics used included presence of apothecia, apothecial rays, soredia, papillae, fibrils, pigmentation and the diameter of the central axis as a proportion of branch diameter. Results revealed a very close relationship between U. antarctica and U. aurantiaco-atra, suggesting that they might constitute a species pair or be conspecific. Usnea sphacelata was comprised of at least two genetically distinct groups with no clear ... : Species identifications were based on morphological characters according to Walker (1985) and Øvstedal & Smith (2001). ...

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