Apoda-Prorepentia, Luer, 2004

Rykaczewski, Max, Driessen, Wiel & Kolanowska, Marta, 2018, A new species of Acianthera (Pleurothallidinae, Orchidaceae) from Brazil, Phytotaxa 372 (4), pp. 291-295 : 293

Key to species of Apoda-prorepentia complex ( Acianthera subgen. Acianthera )

1 Leaf covered with small, black warts ................... A. melanochtoda (Luer & Hirtz 1996: 169–170) Pridgeon & Chase (2001: 244)

1* Leaf not covered with black warts......................................................................................................................................................2

2 Lateral sepals free or connate up to 2/3..............................................................................................................................................3

2 Lateral sepals connate into bifid synsepal..........................................................................................................................................8

3 Sepals glabrous...................................................................................................................................................................................4

3* Sepals pubescent or papillose-fimbriate.............................................................................................................................................5

4 Leaves ovate, obtuse, incised, less than 3 cm, lip glandular with rounded marginal lobes ................................................................. ........................................................................................................... A. karlii ( Pabst 1956: 14) Gonçalves & Waechter (2004: 115)

4* Leaves elliptic, acute, more than 4 cm, lip glabrous, with hook-like marginal lobes .......................................................................... ....................................................................................... A. kateora ( Garay 1973: 133) Karremans & Rincón-González (2015: 178)

5 Spathe 3-4 cm long.......................................................... A. calypso ( Luer 1980: 358) Karremans & Rincón-González (2015: 178)

5* Spathe less than 2 cm long.................................................................................................................................................................6

6 Petals with apical margin erose or serrate..........................................................................................................................................7

6* Petals with margin entire ................................................. A. dodsonii ( Luer 1976: 96) Karremans & Rincón-González (2015: 178)

7. Leaf serrate ..................................................................................... A. serratifolia Rincón-González & Karremans (2015: 178-180)

7* Leaf entire.......................................................................................................................................................................... A. testifolia

8. Sepals glabrous, lip without callus, petals obtuse .............................................................................................................. A. portilloi

8* Sepals pubescent, lip with callus, petals acute...................................................................................................................................9

9* Leaves ovate, sepals glabrous internally, lip with a pair of lamellae, pedicel and ovary covered by spathe ....................... A. hystrix

9* Leaves elliptic, sepals pubescent internally, lip with three lamellae, pedicel partially covered by spathe .......................................... ............................................................................................................................................... A. amsleri Rykacz., Driessen & Kolan.