Bates, R.J. (2016), Three new green-comb Spider Orchids (Arachnorchis species) from South Australia. Australian Orchid Review 81(1): 43-44 [tax. nov.]

• Type: "South Australia, Eyre Peninsula region, Bascombe Well in red sand under native pines near old stockyard, 16 Sept 2013, R.J.Bates 95333 (holo AD).'

• Etymology: "from Latin occidentis of the west, referring to the more westerly distribution of the new subspecies."

Bates, R.J. (2016), New combinations in the South Australia Orchidaceae. Australian Orchid Review 81(2): 63 [basionym]

basionym of: Caladenia conferta subsp. occidentalis (R.J.Bates) R.J.Bates legitimate

Backhouse, G.N., Bates, R.J., Brown, A.P. & Copeland, L.M. (1 March 2016), Checklist of the orchids of Australia including its island territories: 7, 93 [secondary reference]

Jones, D.L. & Clements, M.A. (2017), New combinations in Australian Orchidaceae. Australian Orchid Review 82(2): 63 [replaced synonym]

replaced synonym of: Caladenia hesperia D.L.Jones & M.A.Clem. legitimate

Shaw, J.M.H. in Royal Horticultural Society (2017), Quarterly Supplement to the International Register of Orchid Hybrids (Sander's List) 125(1319): 59 [basionym]

basionym of: Pterostylis conferta subsp. occidentalis (R.J.Bates) J.M.H.Shaw legitimate

Council of Heads of Australasian Herbaria (28 February 2018), Australian Plant Census: - [nomenclatural synonym]

nomenclatural synonym of: Caladenia hesperia D.L.Jones & M.A.Clem. legitimate

Jones, D.L. (January 2021), Native Orchids of Australia Edn. 3: 158 [nomenclatural synonym]

nomenclatural synonym of: Caladenia hesperia D.L.Jones & M.A.Clem. legitimate

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