Polyrhachis goramensis

Every Ant Tells a Story - And Scientists Explain Their Stories Here
Jump to navigation Jump to search
Polyrhachis goramensis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Camponotini
Genus: Polyrhachis
Subgenus: Cyrtomyrma
Species: P. goramensis
Binomial name
Polyrhachis goramensis
Emery, 1887

Polyrhachis goramensis casent0905541 p 1 high.jpg

Polyrhachis goramensis casent0905541 d 1 high.jpg

Specimen Labels


Karavaiev (1927) reported a collection of the synonymous Polyrhachis obsidiana from a carton nest on a tree trunk, near a stream in the jungle.


Polyrhachis goramensis is characterised by: a distinctly swollen pronotal dorsum; a moderately impressed pro-mesonotal suture; short, acute propodeal spines that are sometimes reduced to a pair of tubercules, and distinctly elongated lateral petiolar spines. It is rather similar to Polyrhachis integra from Indonesia. Both have a rather massive pronotum with widely rounded sides, the mesosomal dorsum rapidly descending from the summit of the pronotum to the declivity and short, but distinct, propodeal spines. However, they are easily distinguished, with Polyrhachis integra having a distinctly higher pronotum, the mesonotum virtually straight in lateral view, and the lateral petiolar spines reduced to short teeth. In Polyrhachis goramensis the mesonotal dorsum is convex in lateral view and the widely diverging lateral petiolar spines are more than twice as long as the dorsal pair. (Kohout 2006)

Keys including this Species


Endemic to Seram Island.

Distribution based on Regional Taxon Lists

Indo-Australian Region: Indonesia (type locality).

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.

  • goramensis. Polyrhachis rastellata var. goramensis Emery, 1887a: 239 (w.) INDONESIA (Goram I.). Combination in P. (Cyrtomyrma): Emery, 1925b: 208. Subspecies of euryala: Donisthorpe, 1938c: 260. Raised to species and senior synonym of coronata: Kohout, 1998: 527. See also: Kohout, 2006b: 126.
  • obsidiana. Polyrhachis (Cyrtomyrma) obsidiana Karavaiev, 1927e: 50, fig. 21 (w.q.m.) INDONESIA (Ambon I.). [Junior primary homonym of obsidiana Emery, above.] Replacement name: coronata Santschi, 1928h: 140.
  • coronata. Polyrhachis (Cyrtomyrma) coronata Santschi, 1928h: 140. Replacement name for obsidiana Karavaiev, 1927e: 50. [Junior primary homonym of obsidiana Emery, 1921e: 21.] Junior synonym of goramensis: Kohout, 1998: 527.

The following notes on V.A. Karavaiev type specimens have been provided by Martynov & Radchenko (2016) based on material held in the Institute of Zoology, Ukrainian Academy of Science:

Polyrhachis (Cyrtomyrma) obsidiana Karawajew, 1927.

Type locality(-ies): “Amboina, 19.II.1913 (Nr. 2496), zahlreiche ww.—Ebenda (Nr. 2479, 2490, 2497), ww, qq und mm”.

Original Karawajew label(-s): “Polyrhachis (Cyrtomyrma) / obsidiana Karavaev / typus. Amboina, 2497 / Karavaev.” and “Polyrhachis (Myrmhopla) / coronata Sant. (n. nom) / Amboina, Karavaev, 2497”; “Polyrhachis (Cyrtomyrma) / obsidiana Karavaev, typus / Amboina, 2497, Karavaev” and “Polyrhachis (Cyrtomyrma) / coronata Sant. (n. nom.) / Amboina, Karavaev, 2497”; “Polyrhachis (Cyrtomyrma) / coronata Sant. (n. nom.) / Amboina, Karavaev, 2496”; “Polyrhachis (Cyrtomyrma) / coronata Sant. (n. nom.) / Amboina, Karavaev, / 2496+2497”.

Material: SYNTYPES, 18 w, 9 q (newly mounted, IN 314/6/1), 544 w, 190 q, 1 m, 1 pupa (in alcohol, IN 314/BAMS1/Karaw40–46, 56–58, 67, 68).

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.



Questi esemplari sono un po' piu grandi degli altri; differiscono dalla forma tipica, per la lunghezza maggiore delle spine laterali della squama. Pero la lunghezza relativa di queste spine varia moltissimo anche nella forma tipica, per cui questa differenza non ha molta importanza. I piedi sono per lo piu neri. Alcuni esemplari offrono deboli tracce di denti al metanoto.


Description of the synonymous Polyrhachis (Cyrtomyrma) obsidiana (Karavaiev 1927).


Description of the synonymous Polyrhachis (Cyrtomyrma) obsidiana (Karavaiev 1927).

Type Material

Syntype workers Museo Civico di Storia Naturale, Genoa – as reported by Kohout (2006).

Type Locality Information

INDONESIA, Goram Island (= Seram Island), col. L.M. D’Albertis.


  • Donisthorpe, H. 1938c. The subgenus Cyrtomyrma Forel of Polyrhachis Smith, and descriptions of new species, etc. Ann. Mag. Nat. Hist. 11(1): 246-267 (page 260, Subspecies of euryala)
  • Emery, C. 1887a [1886]. Catalogo delle formiche esistenti nelle collezioni del Museo Civico di Genova. Parte terza. Formiche della regione Indo-Malese e dell'Australia. [part]. Ann. Mus. Civ. Stor. Nat. 24[=(2)(4): 209-240 (page 239, worker described)
  • Emery, C. 1925d. Hymenoptera. Fam. Formicidae. Subfam. Formicinae. Genera Insectorum 183: 1-302 (page 208, Combination in P. (Cyrtomyrma))
  • Karavaiev, V. 1927. Ameisen aus dem Indo-Australischen Gebiet III. Académie des Sciences de l’Ukraïne. Memoires de la Classe des Sciences Physiques et Mathématiques 7(1). Travaux du Musée Zoologique 3: 3-52.
  • Kohout, R. J. 1998. New synonyms and nomenclatural changes in the ant genus Polyrhachis Fr. Smith (Hymenoptera: Formicidae: Formicinae). Mem. Qld. Mus. 42: 505-531 (page 527, Raised to species and senior synonym of coronata)
  • Kohout, R. J. 2006. Review of Polyrhachis (Cyrtomyrma) Forel (Hymenoptera: Formicidae: Formicinae) of Australia, Borneo, New Guinea and the Solomon Islands with descriptions of new species. Memoirs of the Queensland Museum. 52:87-146.
  • Martynov, A.V., Radchenko, A.G. 2016. Karawajew's ant type specimens (Hymenoptera, Formicidae) in the National Museum of Natural History of the National Academy of Sciences of Ukraine. Zootaxa 4097 (2): 244–254.