RT Journal Article
T1 Orthotrichum subgenus Rivularium revisited: Convergent morphology and repeated evolution of the rheophytic syndrome
A1 Medina Bujalance, Rafael
A1 Vitt, Dale H.
A1 Shevock, James R.
AB Orthotrichum, sensu stricto, is a genus of about 90 species that are mostly adapted to xerophytic environments, occurring on a variety of substrate types, including tree trunks and rock surfaces. However, three species—O. euryphyllum, O. rivulare, and O. sprucei—inhabit seasonally submerged substrates along streams and other water bodies. The morphological similarity and peculiar ecological preferences of these three species have been recognized taxonomically by several infrageneric treatments, in particular as subgenus Rivularium, assuming that the acquisition of the rheophytic lifestyle as a single event. We examined with sequence data from nuclear and plastid markers with the hypothesis that these three species form a monophyletic group. Adaptation to the rheophytic habitat arose at least twice in Orthotrichum and very likely additional times in the subfamily. The subgenus Rivularium, as previously recognized, is not monophyletic and the three rheophytic species should be placed in the type subgenus.
PB American Bryological and Lichenological Society
SN 0007-2745
YR 2020
FD 2020-11
LK https://hdl.handle.net/20.500.14352/126299
UL https://hdl.handle.net/20.500.14352/126299
LA eng
NO Medina R, Vitt DH, Shevock JR. Orthotrichum subgenus Rivularium revisited: Convergent morphology and repeated evolution of the rheophytic syndrome. The Bryologist 2020;123. https://doi.org/10.1639/0007-2745-123.4.593.
DS Docta Complutense
RD 29 mar 2026