Polyrhachis unicuspis

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Polyrhachis unicuspis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Camponotini
Genus: Polyrhachis
Subgenus: Myrmothrinax
Species: P. unicuspis
Binomial name
Polyrhachis unicuspis
Emery, 1898

Polyrhachis unicuspis casent0103194 profile 1.jpg

Polyrhachis unicuspis casent0103194 dorsal 1.jpg

Specimen labels

Specimens have been collected from fogging samples in cacao and natural forest.


A member of the Polyrhachis thrinax species group.

Kohout (2008) - Polyrhachis unicuspis is characterised by a relatively long middle petiolar spine and rudimentary lateral spines. However, in the available queens, the lateral spines are developed as short, but distinct and acute spines.

The two thrinax-group species known from Sulawesi are distinguished as follows:

  • Frontal carinae distinctly elevated; propodeal spines upturned; lateral petiolar spines shorter than middle spine, but always present; body generally very dark reddish-brown (in copal) . . . . . Polyrhachis cincta
  • Frontal carinae with margins only narrowly and weakly elevated; propodeal spines horizontal; lateral petiolar spines very short, often rudimentary; body generally very light to medium yellowish-or reddish-brown . . . . . Polyrhachis unicuspis

Keys including this Species


Distribution based on Regional Taxon Lists

Indo-Australian Region: Indonesia (type locality), Sulawesi.

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb




The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • unicuspis. Polyrhachis unicuspis Emery, 1898b: 240, fig. 13 (w.) INDONESIA (Sulawesi). Combination in P. (Myrmothrinax): Emery, 1925b: 184.

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


Type Material

Kohout (2008) - Holotype worker. INDONESIA, SULAWESI, Toli-Toli (H. Fruhstorfer), Museo Civico di Storia Naturale, Genoa (examined).


References based on Global Ant Biodiversity Informatics

  • Chapman, J. W., and Capco, S. R. 1951. Check list of the ants (Hymenoptera: Formicidae) of Asia. Monogr. Inst. Sci. Technol. Manila 1: 1-327
  • Emery C. 1898. Descrizioni di formiche nuove malesi e australiane. Note sinonimiche. Rendiconti delle Sessioni della Reale Accademia delle Scienze dell'Istituto di Bologna (n.s.)2: 231-245.
  • Emery C. 1901. Formiciden von Celebes. Zoologische Jahrbücher. Abteilung für Systematik, Geographie und Biologie der Tiere 14:565-580.
  • Kohout, R. J. 2008. 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.