SUBGENUS Arthrosia Luer 1986

Characterized by the tranverse callus across the base of the lip that articulates with a transverse cavity across the base of the column foot. The apex of the colum is toothed or lacerate and is partially covering the anther. The caesptriose to repent ramicauls may be round to laterally compressed to triquetrous above and carry sessile leaves and racemose inflorescence without an annulus.

1. Pleurothallis auriculata Lindl. 1836 Bolivia

2. Pleurothallis barbacenensis Barb. Rodr. 1881 Brazil

3. Pleurothallis caldensis Hoehne & Schltr. 1926 Brazil

4. Pleurothallis capillaris Lindl. 1835 Leeward Islands, the Windward Islands, Venezuela, Colombia, Ecuador, Bolivia and Brazil

5. Pleurothallis duartei Hoehne 1929 Brazil

6. Pleurothallis freyii in ed. Brazil

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7. Pleurothallis gracilis Barb.Rodr. 1877 Brazil

8. Pleurothallis muscosa Barb.Rodr. 1877 Brazil and Argentina

9. Pleurothallis purpureoviolacea Cogn. 1896 Brazil