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Opisthopsis respiciens
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Camponotini
Genus: Opisthopsis
Dalla Torre, 1893
Type species
Formica (Myrmecopsis) respiciens, now Opisthopsis respiciens
20 species
(Species Checklist, Species by Country)

Opisthopsis respiciens casent0173607 profile 1.jpg

Opisthopsis respiciens

Opisthopsis respiciens casent0173607 dorsal 1.jpg

Specimen Label

Evolutionary Relationships

  (1 species)

  (1 species)

  (41 species)


  (117 species)

  (20 species)

  (2 species)

  (788 species)

  (1,486 species)

  (14 species)

  (39 species)

Based on Ward et al. 2016.

Photo Gallery

  • Shattuck C14160-web, SOSC-4575, ANIC32-030552-3, Opisthopsis, e. Mareeba, Queensland.jpg
  • Shattuck C14167, SOSC-4575-1, ANIC32-030552, Opisthopsis, e. Mareeba, Queensland.jpg


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

Keys including this Genus



Distribution and Richness based on AntMaps


Life History Traits

  • Mean colony size: 100-200 (Greer et al., 2021)
  • Compound colony type: not parasitic (Greer et al., 2021)
  • Nest site: hypogaeic; arboreal (Greer et al., 2021)
  • Diet class: omnivore (Greer et al., 2021)
  • Foraging stratum: subterranean/leaf litter; arboreal (Greer et al., 2021)



Worker Morphology

• Antennal segment count: 12 • Antennal club: absent • Palp formula: 6,4 • Total dental count: 5-6 • Spur formula: 1 simple, 1 simple • Eyes: >100 ommatidia • Pronotal Spines: absent • Mesonotal Spines: absent • Propodeal Spines: absent • Petiolar Spines: absent • Caste: monomorphic, some size-variable • Sting: absent • Metaplural Gland: present • Cocoon: present


All Karyotype Records for Genus

Explore Data: All, Drilldown
Click here to show/hide karyotype data.
Taxon Haploid Diploid Karyotype Locality Source Notes
Opisthopsis rufithorax 50 Australia Imai et al., 1977


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

  • OPISTHOPSIS [Formicinae: Camponotini]
    • Opisthopsis Dalla Torre, 1893: 219. Replacement name for Myrmecopsis Smith, F. 1865: 68. [Junior homonym of Myrmecopsis Newman, 1850: cxxii (Lepidoptera).]
  • MYRMECOPSIS [junior homonym, see Opisthopsis]
    • Myrmecopsis Smith, F. 1865: 68 [as subgenus of Formica]. Type-species: Formica (Myrmecopsis) respiciens, by monotypy. [Junior homonym of Myrmecopsis Newman, 1850: cxxii (Lepidoptera).]
    • Myrmecopsis raised to genus: Mayr, 1876: 76.
    • Opisthopsis Dalla Torre, 1893: 219, replacement name for Myrmecopsis Smith, F.


  • Agosti, D. 1991. Revision of the oriental ant genus Cladomyrma, with an outline of the higher classification of the Formicinae (Hymenoptera: Formicidae). Syst. Entomol. 16: 293-310. (page 295, Opisthopsis in Formicinae, Formica genus group.)
  • Ashmead, W. H. 1905c. A skeleton of a new arrangement of the families, subfamilies, tribes and genera of the ants, or the superfamily Formicoidea. Can. Entomol. 37: 381-384 (page 384, Opisthopsis in Camponotinae, Camponotini)
  • Bolton, B. 2003. Synopsis and Classification of Formicidae. Mem. Am. Entomol. Inst. 71: 370pp (page 121, Opisthopsis in Formicinae, Camponotini)
  • Dalla Torre, K. W. von. 1893. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus. Vol. 7. Formicidae (Heterogyna). Leipzig: W. Engelmann, 289 pp. (page 219, Opisthopsis replacement name for Myrmecopsis Smith, F., 1865:68; Opisthopsis in Camponotinae Myrmecopsis Newman (Lepidoptera), 1850 senior homonym of Myrmecopsis Smith, 1865)
  • Emery, C. 1895l. Die Gattung Dorylus Fab. und die systematische Eintheilung der Formiciden. Zool. Jahrb. Abt. Syst. Geogr. Biol. Tiere 8: 685-778 (page 772, Opisthopsis in Camponotinae, Camponotini)
  • Emery, C. 1925d. Hymenoptera. Fam. Formicidae. Subfam. Formicinae. Genera Insectorum 183: 1-302 (page 54, Opisthopsis in Formicinae, Camponotini)
  • Forel, A. 1912j. Formicides néotropiques. Part VI. 5me sous-famille Camponotinae Forel. Mém. Soc. Entomol. Belg. 20: 59-92 (page 89, Opisthopsis in Camponotinae, Camponotini)
  • Forel, A. 1917. Cadre synoptique actuel de la faune universelle des fourmis. Bull. Soc. Vaudoise Sci. Nat. 51: 229-253 (page 250, Opisthopsis in Camponotinae, Camponotini)
  • Wheeler, W. M. 1910b. Ants: their structure, development and behavior. New York: Columbia University Press, xxv + 663 pp. (page 144, Opisthopsis in Camponotinae, Camponotini)
  • Wheeler, W. M. 1918d. The ants of the genus Opisthopsis Emery. Bull. Mus. Comp. Zool. 62: 341-362 (page 341, Revision of genus (out of date))
  • 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 700, Opisthopsis in Formicinae, Camponotini)