SITF confirms this plant as Masdevallia microptera (Sep 2026). This plant matches the IOSPE and Orchidroots photos and Luer's drawing on the IOSPE. Using the key from from Icones Pleurothallidinarum, Volume 23, Systematics of Masdevallia (Part Four), there appears to be a typo in couplet #10 of the key for Subsection Oscillantes where the second choice should likely be #11, not #18. Otherwise, the key never takes you to couplet #11 and subsequently to M. microptera. On enlargement, one of the photos shows the lip with a hook at the apex of the midlobe that matches the "uncinate" (shaped like a hook or curved at the tip) wings in the description.