Monographs Details: Arachnothryx hispidulus Griseb.
Authority: Maguire, Bassett. 1967. The botany of the Guayana Highland--Part VII. Mem. New York Bot. Gard. 17: 1-439.

Roncleletia hispidula (Griseb.) Schum. in Engler & Prantl, Nat. Pflanzenfam. 4(4): 35. 1891.

Type. Maraccas Waterfall, Trinidad, 10 Nov 1845 (without collector indicated) .

The specific description of Grisebach refers to the lower portion of the corolla-tube within as "glabrous.” Study of isotype material at NY shows this portion of the corolla-tube to be pubescent .