Molecular and morphological evidence for distinct species in Dumortiera (Dumortieraceae)

Geographical structure, narrow species ranges, and Cenozoic diversification in a pantropical clade of epiphyllous leafy liverworts

“…Range estimation is a challenging theme in morphologically little differentiated groups of organisms and suitable to improve understanding of species diversity and evolution. Many bryophyte genera belong to these critical groups and are in need of thorough reinvestigation including integrative molecular-morphological approaches; however, to date, only a limited number of studies is available (Dong et al, 2012;Forrest, Salazar-Allen, Gudiño, Korpelainen, & Long, 2011;Hedenäs et al, 2014;Heinrichs et al, 2015;Renner et al, 2013;Vanderpoorten, Patiño, Dirkse, Blockeel, & Hedenäs, 2015;Vigalondo et al, 2016). These studies identified numerous morphologically not or weakly differentiated bryophyte species of which many have rather narrow ranges.…”

An Analysis of Volatile Components of the Liverworts Dumortiera hirsuta subsp. hirsuta and Dumortiera hirsuta subsp. nepalensis (Dumortieraceae) from Panama and Taxonomic Observations on the Species

“…Dumortiera hirsuta (Sw.) Nees is a thallose liverwort widely distributed in the tropical and subtropical regions of the world, with infrequent presence in the more warmer and humid areas of the temperate zones [1][2]. This species is not characterized by the presence of internally differentiated thalli into distinct layers such as other liverworts of the order Marchiantiales [2]. Dumortiera hirsuta had previously been assigned to the Marchantiaceae family, but based on molecular evidence, it has now been placed in its own family Dumortieraceae [3].…”

“…Schust., because of differences in the thallus morphology [4]. The occurrence of both subspecies has been reported Asia, Europe, in the Northern and Southern countries of the Americas, but also in Central America and Panama [2,5]. Previous reports on the chemical composition of D. hirsuta species identified the presence of flavonoids, steroids, bibenzyls, aromatic compounds, monoterpenoids, diterpenoids, sesquiterpenoids and acetogenins in samples collected from Asia, Europe and the New World [6].…”

“…Previous chemical studies on the chemical composition of D. hirsuta have been carried out, without evaluating the differences between the two subspecies, even though this is valuable for supporting the taxonomic knowledge of the species. It is worth noting that this species is the only one included within its own family Dumortieraceae [2,6].…”

“…Dumortiera hirsuta subsp. hirsuta includes plants, with a shiny dark green thallus, smooth dorsal surface with absence of vestigial air chambers or these restricted to the most apical section of the plant and with few dorsal papillae [2]. The second subspecies, D. hirsuta subsp.…”