Species

Hermarchus trigonus (Thunberg, 1815) (Nomen dubium)

Nomenclature (5)

Phasma trigona Thunberg, 1815: 300. (nomen dubium)
Syntype; 8f7832b3-1af9-4336-84ac-709a80df8d5b; Unknown
Phasma trigona Thunberg, 1815 in Westwood, 1859: 183.
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Hermarchus trigonus (Thunberg, 1815) in Otte & Brock, 2005: 156.
Hermarchus trigonus (Thunberg, 1815) in Brock & Büscher, 2022: 572. Phylogeny or classification

Brock, P.D. & Büscher, T.H. (2022) Stick and leaf-insects of the world, Phasmids. NAP Editions, France: Verrières-le-Buisson, 612 pp. Available at http://www.napeditions.com/en/67-stick-and-leaf-insects-of-the-world.html
Kirby, W.F. (1904) A synonymic catalogue of Orthoptera. 1. Orthoptera Euplexoptera, Cursoria et Gressoria. (Forficulidae, Hemimeridae, Blattidae, Mantidae, Phasmidae). The Trustees of the British Museum, London, Vol. 1, 501 pp. Available at http://www.biodiversitylibrary.org/item/29661
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Thunberg, C.P. (1815) Hemipterorum maxillosorum genera illustrata plurimisque novis speciebus ditata ac descripta. Mémoires de L'Académie Impériale des Sciences de St. Pétersbourg, 5, 211–301, pl. 3. Available at http://www.biodiversitylibrary.org/item/44403#page/257/mode/1up
Westwood, J.O. (1859) Catalogue of the orthopterous insects in the collection of the British Museum. Part I. Phasmidae. British Museum, London, 196 pp, 48 pl. Available at http://www.archive.org/details/catalogueofortho00brituoft

Summary of taxonomic names by rank, showing valid extant names, fossil names, invalid names, and total counts.
Taxon	Valid names
Rank	Extant	Fossil	Invalid	Total
Species	1	0	1	2