Wiehler (Leeuwenb.) 2016 - Wiehler H (1978) THE GENERA EPISCIA, ALSOBIA, NAUTILOCALYX, AND PARADRYMONIA (GESNERIACEAE). Selbyana 5(1): 11-60. Retrieved from http://www.jstor.org/stable/41759515
There is no corrections for Nautilocalyx adenosiphon yet.