Protected NSW. Since 2002 Thynninorchis consisting of two species, one endemic to Tasmania and one in southeastern Australia, were split from Arthrochilus. Arthrochilus huntianus is a nomenclature hangover and an outdated synonym for Thynninorchis huntianus.
The remaining genus of Arthrochilus are almost entirely found in norther Queensland, Northern Territory or Papua New Guinea, with the only exception being Arthrochilus prolixus also found in NSW from Brunswick Heads to Mona Vale.
All Arthrochilus have leaves where Thynninorchis do not, the flower structure is also different. DNA-based molecular phylogenetic studies supported recognition of Thynninorchis as a distinct genus (Miller & Clements 2014).
Lachlan Copland and Gary Backhouse new book also treat Thynninorchis huntianus in this same way and record Arthrochilus huntianus as another (old) name.
Thynninorchis huntianus is listed in the following regions:
Canberra & Southern Tablelands | South Coast
Synonyms
Thynninorchis huntiana Arthrochilus huntianus