Every Ant Tells a Story - And Scientists Explain Their Stories Here
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Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Melophorini
Genus: Notostigma
Emery, 1920
Type species
Camponotus carazzii, now Notostigma carazzii
2 species
(Species Checklist, Species by Country)

Notostigma carazzii casent0102089 profile 1.jpg

Notostigma carazzii casent0102089 dorsal 1.jpg

Specimen Label

Evolutionary Relationships

  (2 genera)

  (10 genera)


  (92 species)

  (48 species)

  (3 species)

  (6 species)

  (2 species)

  (6 species)

  (2 species)

  (20 species)

  (3 species)

  (8 genera)

Gesomyrmex, Oecophylla

  (9 genera)

Gigantiops, Myrmoteras, Santschiella

  (8 genera)

Based on Ward et al. 2016.

Species of Notostigma are among the largest ants found in Australia. They can be quite common where they occur, but because they forage singly and almost exclusively at night they are often overlooked. Nests are in soil, either with a moderatelly large mound or soil around the entrance (Notostigma foreli) or under stones or wood (Notostigma carazzii). Foraging activity has been reviewed by Taylor (1992).


Shattuck (1999) - The antennal sockets are separated from the rear margin of the clypeus by a gap greater than the smallest diameter of the scape. The mandibles have more than ten teeth. The simple eyes (ocelli) are present on the top of the head. They are large ants, over 10mm in total length, with elongate bodies nad long antennal scapes.

Species of Notostimgma can be separated from other formicinies by their large body size, long scapes, numerous mandibular teeth and the presence of a small opening above the hind legs (the metapleural gland opening). The are most commonly confused with larger species of Camponotus, but they differ as mentioned.

AntWeb icon 02.png See images of species within this genus

Keys including this Genus


Keys to Species in this Genus


Distribution and Richness based on AntMaps




Worker Morphology

 • Antennal segment count 12 • Antennal club absent • Palp formula 6,4 • Total dental count 11-13 • Spur formula 1 pectinate, 1 pectinate • Eyes present • Scrobes absent • Caste dimorphic • Sting absent • Notes: from literature


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

  • NOTOSTIGMA [Formicinae: Notostigmatini]
    • Notostigma Emery, 1920b: 252. Type-species: Camponotus carazzii, by original designation.

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


Emery 1920.
Emery 1920.


  • Bolton, B. 2003. Synopsis and Classification of Formicidae. Mem. Am. Entomol. Inst. 71: 370pp (page 126, Notostigma in Formicinae, Notostigmatini)
  • Emery, C. 1920b. Le genre Camponotus Mayr. Nouvel essai de la subdivision en sous-genres. Rev. Zool. Afr. (Bruss.) 8: 229-260 (page 252, Notostigma as genus)
  • Emery, C. 1925d. Hymenoptera. Fam. Formicidae. Subfam. Formicinae. Genera Insectorum 183: 1-302 (page 56, Notostigma in Formicinae, Camponotini)
  • Taylor, R. W. 1992a. Nomenclature and distribution of some Australian and New Guinean ants of the subfamily Formicinae (Hymenoptera: Formicidae). J. Aust. Entomol. Soc. 31:57-69.
  • Wheeler, W. M. 1922i. Ants of the American Museum Congo expedition. A contribution to the myrmecology of Africa. VII. Keys to the genera and subgenera of ants. Bull. Am. Mus. Nat. Hist. 45: 631-710 (page 703, Notostigma in Formicinae, Camponotini)