Buck W.R.1, Goffinet B.2 2015. Larrainia, a new genus of Amblystegiaceae from the Cape Horn region of Chile // Arctoa. Vol. 24: 27–31 [in English].

1Institute of Systematic Botany, The New York Botanical Garden, Bronx, NY 10458-5126, U.S.A; e-mail: editorbuck@nybg.org

2Ecology and Evolutionary Biology, 75 North Eagleville Road, University of Connecticut, Storrs, CT 06269-3043, U.S.A.; e-mail: bernard.goffinet@uconn.edu

KEYWORDS: Amblystegiaceae, Brachytheciaceae, Chile, Conardia, Eurhynchiella, Larrainia, Rhynchostegiella, Vittia

ABSTRACT. Larrainia prorulosa W.R.Buck is described as a new genus and species of Amblystegiaceae from southernmost Chile. The new genus is characterized by a very small stature, differentiated branch and stem leaves, and short prorulose laminal cells. The two known collections are both sterile. Based on DNA sequence data, Larrainia is placed in the Amblystegiaceae, most closely related to Vittia. However, it is most similar morphologically to Conardia. The new species would probably have previously been placed in Rhynchostegiella in the Brachytheciaceae (as has been Conardia). The diversity within Rhynchostegiella is discussed.

doi: 10.15298/arctoa.24.05

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