The complete chloroplast genome of an Antarctic moss, <i>Ptychostomum pseudotriquetrum</i> (Hedw.) J.R.Spence &amp; H.P.Ramsay (Bryaceae), and phylogenetic analysis

<i>Ptychostomum pseudotriquetrum</i> (Hedw.) J.R.Spence & H.P.Ramsay (Bryaceae) is a bipolar and one of the most widespread species within Antarctica, exhibiting a ubiquitous presence along the Antarctic Peninsula. This study analyzed its chloroplast genome, which is 123,172 bp in length, and consists of 82 protein-coding genes, four ribosomal RNA genes, and 31 transfer RNA genes. A phylogenetic tree, constructed using 58 conserved orthologous protein-coding genes from 19 complete chloroplast genomes of the class Bryopsida, confirmed that <i>P. pseudotriquetrum</i> belongs to clade Bryaceae. Within this clade, <i>P. pseudotriquetrum</i> diverged from the clade containing <i>Anomobryum gemmigerum</i> and <i>Bryum argenteum</i>. This study contributes to enriching chloroplast genome resources for the family Bryaceae and the genus <i>Ptychostomum</i>. Such advancement could facilitate future genetic investigations aimed at conserving and exploiting Antarctic bryophytes.