Polyrhachis ithona

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Polyrhachis ithona
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Camponotini
Genus: Polyrhachis
Subgenus: Myrma
Species: P. ithona
Binomial name
Polyrhachis ithona
Smith, F., 1860

Polyrhachis ithona casent0901837 p 1 high.jpg

Polyrhachis ithona casent0901837 d 1 high.jpg

Specimen Labels


A member of the Polyrhachis relucens species group in the subgenus Myrma

Keys including this Species


Distribution based on Regional Taxon Lists

Indo-Australian Region: Indonesia (type locality), New Guinea, Solomon Islands.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb




The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • ithona. Polyrhachis ithonus Smith, F. 1860b: 99, pl. 1, fig. 18 (w.q.) INDONESIA (Batjan I.). Combination in P. (Myrma): Emery, 1925b: 202. Subspecies of relucens: Dalla Torre, 1893: 268; Emery, 1893e: 228; Emery, 1896d: 379; Emery, 1897d: 579; Stitz, 1911a: 375; Donisthorpe, 1932c: 460. Revived status as species: Bolton, 1974b: 177.

Type Material

Kohout (2008) - Syntype worker, queen. INDONESIA, Batjan I. (A.R. Wallace), Oxford University Museum of Natural History (examined).

The following notes on F. Smith type specimens have been provided by Barry Bolton (details):

Polyrhachis ithonus

One worker syntype and one queen syntype in Oxford University Museum of Natural History. Both labelled “Bac.” (= Batjan I.) and the queen with a Donisthorpe type-label.

Other workers of this species are present in Oxford University Museum of Natural History, from “Wag.” (= Waigeo I.) and “M.” (= Misool I.).

Determination Clarifications

Kohout (2008) - Emery (1901) listed this species from Sulawesi as Polyrhachis chaonia, however, I have only seen specimens from Morotai (= Morty), Halmahera and Ternate Islands in the Moluccas.


  • Bolton, B. 1974b [1973]. New synonymy and a new name in the ant genus Polyrhachis F. Smith (Hym., Formicidae). Entomol. Mon. Mag. 109: 172-180 (page 177, Revived status as species)
  • Dalla Torre, K. W. von. 1893. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus. Vol. 7. Formicidae (Heterogyna). Leipzig: W. Engelmann, 289 pp. (page 268, Variety/subspecies of relucens)
  • Donisthorpe, H. 1932c. On the identity of Smith's types of Formicidae (Hymenoptera) collected by Alfred Russell Wallace in the Malay Archipelago, with descriptions of two new species. Ann. Mag. Nat. Hist. 10(10): 441-476 (page 460, Variety/subspecies of relucens)
  • Emery, C. 1893g. Formicides de l'Archipel Malais. Rev. Suisse Zool. 1: 187-229 (page 228, Variety/subspecies of relucens)
  • Emery, C. 1896j. Saggio di un catalogo sistematico dei generi Camponotus, Polyrhachis e affini. Mem. R. Accad. Sci. Ist. Bologna (5)5:363-382 (page 379, Variety/subspecies of relucens)
  • Emery, C. 1897e. Viaggio di Lamberto Loria nella Papuasia orientale. XVIII. Formiche raccolte nella Nuova Guinea dal Dott. Lamberto Loria. [concl.]. Ann. Mus. Civ. Stor. Nat. 38[=(2(18): 577-594 (page 579, Variety/subspecies of relucens)
  • Emery, C. 1925d. Hymenoptera. Fam. Formicidae. Subfam. Formicinae. Genera Insectorum 183: 1-302 (page 202, Combination in P. (Myrma))
  • Kohout, R.J. 2008a. A review of the Polyrhachis ants of Sulawesi with keys and descriptions of new species (Hymenoptera: Formicidae: Formicinae). Memoirs of the Queensland Museum. 52:255-317. PDF
  • Smith, F. 1860b. Catalogue of hymenopterous insects collected by Mr. A. R. Wallace in the islands of Bachian, Kaisaa, Amboyna, Gilolo, and at Dory in New Guinea. J. Proc. Linn. Soc. Lond. Zool. 5(17b)(suppl. to vol. 4 4: 93-143 (page 99, pl. 1, fig. 18 worker, queen described)
  • Stitz, H. 1911b. Formicidae. Wiss. Ergeb. Dtsch. Zent.-Afr.-Exped. 3: 375-392 (page 375, Variety/subspecies of relucens)