A new species of Didymodon Hedw. (Pottiaceae, Bryophyta) from Peru

Abstract

Didymodon incurvus J. A. Jiménez & M. J. Cano, is described and illustrated as a new species based on specimens collected from the Puno department in southern Peru. The new taxon is distinguished from others species of the genus by its oblong-lanceolate and appressed leaves when dry, incurved margins above midleaf, and the presence of a bulging ventral costal pad of cells. A key to species of Didymodon in Peru is provided.

Phylogeny and divergence time estimation of the genus Didymodon (Pottiaceae) based on nuclear and chloroplast markers

“…Our results show that there are different kinds of papillar structures in the species within each separated genus, including multiple papillae, sparse papillae, simple papillae, and no papillae, but the species with papillae originated earlier than those with a smooth leaf surface. All of the species without papillae commonly originated after the Eocene, such as D. epapillatus (Kou et al, 2016a) and D. mongolicus (Zhao et al, 2016) in Didymodon s.str., T. umbrosus (Jiménez, 2006) in Trichostomopsis , G. luridus (Afonina et al, 2020) in Geheebia and H. johansenii (Jiménez, 2006) in Husnotiella . According to Yan et al (2018), the formation of papillae is probably an evolutionarily conserved defense mechanism from the early land colonization by plants.…”

“…includes the most typically mountain taxa which have a relatively narrow range size compared with the other seven genera. On the contrary, the distribution range of the species in the oldest genus, Husnotiella , is relatively wider (commonly distributed in Asia, Europe, and America; Jiménez et al, 2006; Zander, 2007; Jia & He, c) among Didymodon s.lat. Range size is a basic unit in biogeography and can be considered to be a species trait, reflecting interspecific differences of ecological tolerance, dispersal ability, and evolutionary history (Thompson et al, 1999, Olalla‐Tarraga et al, 2011).…”

Didymodon hegewaldiorum(Pottiaceae), a new species from the Tropical Andes

“…However, the number of mosses known from Peru is steadily increasing as specific groups in Peru are studied and additional collections are made. An example of this are the numerous papers published recently about different members of the family Pottiaceae (Cano, 2008;Cano & Gallego, 2008;Cano et al, 2008a,b;Gallego, Cano & Guerra, 2006;Jiménez, 2007;Jiménez & Cano, 2008).…”

Marking the end of the International Year of Biodiversity

“…Kessler, 2008; Rouhan et al ., 2008; Yesilyurt, 2008; Christenhusz, 2010) of ferns and new species of lichens (Aptroot, 2008), mosses (e.g. Cano & Gallego, 2008; Jiménez & Cano, 2008) and cycads (e.g. Singh & Radha, 2008; Taylor, Haynes & Holzman, 2008; Vovides et al ., 2008) are still being described.…”