Halford, D.A. (9 September 1992), Review of the genus Oldenlandia L. (Rubiaceae) and related genera in Australia. Austrobaileya 3(4): 706-707, Fig. 6A-C, Map 1 APC [tax. nov.]

• Type: "Northern Territory. Hemple Bay, Groote Islandt, in the Gulf of Carpentaria, 28 April 1948, R.L.Specht 300 (holo: BRI; iso: AD,CANB,DNA,MEL,NSW,PERTH)."

• APC Dist.: NT, Qld

• Etymology: The specific epithet alludes to the black colour of the plants when dried.

Gibbons, K.L. (June 2020), Hedyotis, Oldenlandia and related genera (Rubiaceae: Spermacoceae) in Australia: New genera and new combinations in an Asian-Australian-Pacific lineage. Taxon 69(3): 532 [basionym]

basionym of: Paranotis mitrasacmoides subsp. nigricans (Halford) K.L.Gibbons legitimate

Brown, G.K. & Bostock, P.D. (December 2020), Appendix A: New names and name and status changes 2019 to 2020. Introduction to the Census of the Queensland Flora 2020: 18 [nomenclatural synonym]

nomenclatural synonym of: Paranotis mitrasacmoides subsp. nigricans (Halford) K.L.Gibbons legitimate

Brown, G.K. (December 2021), Appendix A: New names and name and status changes 2020 to 2021. Introduction to the Census of the Queensland Flora 2021: 12 [nomenclatural synonym]

nomenclatural synonym of: Paranotis mitrasacmoides subsp. nigricans (Halford) K.L.Gibbons legitimate

---