Jones, D.L. & French, C.J. (2017), Five new species of Plumatichilos (Orchidaceae: Pterostylidinae) from Western Australia. Australian Orchid Review 82(5): 27-30, Fig. 1 [tax. nov.]

• Type: Western Australia. Darling District: 48.8 km along Muirs Highway form Manjimup towards Mt Barker, 16 Oct. 1988, D.L.Jones 3181A (holo CBG 8806843, iso AD, MEL, NSW, PERTH)."

• Etymology: "The Latin longus, long, and cornis, horn (in composition), in reference to the long filamentous points on the sepals which resemble horns; this species probably has the longest sepaline tips in the genus."

Jones, D.L. & French, C.J. (2018), New combinations in the Pterostylidinae. Australian Orchid Review 83(1): 63 [taxonomic synonym]

taxonomic synonym of: Pterostylis longicornis D.L.Jones & C.J.French nom. inval.

Jones, D.L. & French, C.J. (2018), New combinations in the Pterostylidinae. Australian Orchid Review 83(4): 55 [basionym]

basionym of: Pterostylis longicornis (D.L.Jones & C.J.French) D.L.Jones & C.J.French legitimate

Jones, D.L. (January 2021), Native Orchids of Australia Edn. 3: 591 [secondary reference]

nomenclatural synonym: Pterostylis longicornis (D.L.Jones & C.J.French) D.L.Jones & C.J.French legitimate common name: Muirs Highway Bird Orchid [n/a]

Council of Heads of Australasian Herbaria (7 July 2021), Australian Plant Census: - [nomenclatural synonym]

nomenclatural synonym of: Pterostylis longicornis (D.L.Jones & C.J.French) D.L.Jones & C.J.French legitimate

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