Polyrhachis luctuosa

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Polyrhachis luctuosa
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Camponotini
Genus: Polyrhachis
Subgenus: Cyrtomyrma
Species: P. luctuosa
Binomial name
Polyrhachis luctuosa
Emery, 1921

Polyrhachis luctuosa casent0905547 p 1 high.jpg

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Specimen Labels

Nothing is known about the biology of Polyrhachis luctuosa.


Polyrhachis luctuosa is closely related to Polyrhachis inflata, with both distinguished from all other known New Guinean species by the very closely reticulate-punctate sculpturation of their body, giving them a distinct, opaque appearance. However, Polyrhachis inflata is easily distinguished from Polyrhachis luctuosa by its exceptionally high pronotal dorsum which bears a well-defined, median, longitudinal furrow along its summit. The pronotum in Polyrhachis luctuosa is not swollen and has no furrow on its summit. (Kohout 2006)

Keys including this Species


From Kohout (2006): Polyrhachis luctuosa is apparently very rare and, besides the type, only one additional specimen was collected by R.W. Taylor at Hayfield nr Maprik (East Sepik Prov., Papua New Guinea).

Distribution based on Regional Taxon Lists

Indo-Australian Region: New Guinea (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb



Known only from the worker caste.


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

  • luctuosa. Polyrhachis (Cyrtomyrma) luctuosa Emery, 1921e: 25 (w.) NEW GUINEA. See also: Kohout, 2006b: 131.

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



Noire, pattes tendant au roux, absolument mate, densement et finement ponctuee sur presque tout le corps et sur les membres; les mandibules, l'extremite et le dessous du gastre sont plus ou moins luisants. Pubescence tres courte et eparse. Des poils dresses blanchatres, courts, sont semes sur la tete et le gastre.

Pareille pour la forme du corps a P. rastellata, mais le corselet est encore plus court et plus bossu. Les dents laterales de l'ecaille ne sont guere plus longues que les mediales.

L. environ 6,5 mm.

Type Material

NEW GUINEA. Holotype worker. Museo Civico di Storia Naturale, Genoa - as reported by Kohout (2006).


  • Emery, C. 1921e. Le genre Polyrhachis. Classification; espèces nouvelles ou critiques. Bull. Soc. Vaudoise Sci. Nat. 54: 17-25 (page 25, worker described)
  • 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.