The genus Arthrosia (ar-THROW-zee-uh) used to be in Pleurothallis as subgenus Arthrosia.  They are characterized by repent plants with long ramicauls and the lip has a basal transverse callus articulated with the apex of the column-foot.

   Arthrosia auriculata (Lindl.) Luer

   Arthrosia barbacenensis (Barb.Rodr.) Luer

   Arthrosia caldensis (Hoehne) Luer

   Arthrosia duartei (Hoehne) Luer

   Arthrosia floribunda (Lindl.) Luer

   Arthrosia freyi Luer

   Arthrosia hygrophila (Barb.Rodr.) Luer

   Arthrosia malacantha (Rchb.f.) Luer

   Arthrosia muscosa (Barb.Rodr.) Luer

   Arthrosia myrticola (Barb.Rodr.) Luer

   Arthrosia purpureo-violacea (Cogn.) Luer