Asterochloris sejongensis sp. nov. (Trebouxiophyceae, Chlorophyta) from King George Island, Antarctica

The new species Asterochloris sejongensis sp. nov. has been collected from four localities of King George Island, Antarctica, and is described as a phycobiont of the lichen species Cladonia pyxidata and Sphaerophorus globosus. This discovery is based on morphological and molecular data obtained usin...

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Bibliographic Details
Published in:Phytotaxa
Main Authors: KIM, JONG IM, NAM, SEUNG WON, SO, JAE EUN, HONG, SOON GYU, CHOI, HAN-GU, SHIN, WOONGGHI
Format: Article in Journal/Newspaper
Language:English
Published: Phytotaxa 2017
Subjects:
Antarctica
Asterochloris
phycobiont
phylogeny
ultrastructure
Algae
King George Island
Antarc*
Online Access:http://www.mapress.com/j/pt/article/view/phytotaxa.295.1.5
https://doi.org/10.11646/phytotaxa.295.1.5
Description
Summary:The new species Asterochloris sejongensis sp. nov. has been collected from four localities of King George Island, Antarctica, and is described as a phycobiont of the lichen species Cladonia pyxidata and Sphaerophorus globosus. This discovery is based on morphological and molecular data obtained using light microscopy, confocal laser microscopy, transmission electron microscopy, and two molecular markers; nuclear internal transcribed spacer (ITS) rDNA and actin genes. This species is characterized by five unique hemi-CBCs in the nuclear ITS transcripts, deeply lobed and echinulate chloroplasts (depending on the life stage), and two rows of pyrenoglobuli associated with two thylakoid envelopes. A molecular phylogenetic analysis of the ITS and actin gene sequences indicated that this new species is closely related to A. woessiae and forms a distinct well-supported lineage with the genus.

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