Tetraponera

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Tetraponera
Temporal range: 33.9–0 Ma
Eocene – Recent
Tetraponera nigra
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Pseudomyrmecinae
Genus: Tetraponera
Smith, F., 1852
Type species
Tetraponera atrata (junior synonym of Tetraponera nigra)
Diversity
109 species
7 fossil species
(Species Checklist)

Tetraponera nigra casent0103313 profile 1.jpg

Tetraponera nigra

Tetraponera nigra casent0103313 dorsal 1.jpg

Specimen Label

Synonyms
Evolutionary Placement
Pseudomyrmecinae

Tetraponera
  (109 species)




Myrcidris
  (1 species)



Pseudomyrmex
  (146 species)




Based on Brady et al., 2006

Widespread in the Old World tropics, Tetraponera contains just over 100 taxa, occurring in Africa, Madagascar, India, south-east Asia and Australia. Five species have been described from Baltic amber, and one from Oligocene deposits in France. Although less diverse than its New World counterpart Pseudomyrmex, Tetraponera is nevertheless a conspicuous element of the ant fauna in some regions, especially Madagascar where there are about 30 species (mostly undescribed). Most species are unspecialized arboreal nesters, living in dead twigs, branches, insect bored cavities or domatia of living plants (Ward 1990, 1991). In the latter case these species typically have co-evolved with their hosts and provide protection from herbivores (Ward, 1991).

Identification

Ward (1990):

Worker Monomorphic or (rarely) polymorphic, variable in size (worker HW 0.42-2.25). Basal and masticatory margins of mandibles usually distinct, occasionally meeting at a rather oblique angle; basal margin with 0-2 teeth, proximal tooth always lacking; masticatory margin with 3-6 teeth, usually 3 or 4, subequal in size. Venter of mandible with a single ridge or weak rise, which is continuous and broadly rounded behind the masticatory and basal margins (sometimes this ridge is very reduced). Palp formula: 6,4 in all species, except T. tessmanni where reduced to (4p3.3). Distal margin of labrum usually with a narrow, notch-like cleft; prominent teeth or protuberances sometimes present on the labrum. Anterodorsal surface of median clypeal lobe continuous, non-truncate; anterior margin often toothed or crenulate. Antennae 12-segmented. Median lobes of antennal sclerites rather strongly expanded laterally, covering most of the basal condyles of the antennae (ASI 0.75-1.00). Frontal carinae separated by more than basal scape width (FCI 0.08-0.25). Compound eyes relatively large, width two-thirds or more the length. Number of ocelli: 3, with reductions to 2 and (commonly) 0. Metanotal groove usually distinctly impressed, sometimes preceded by a distinct, flattened, metanotal (or mesoscutellar?) plate. Hind basitarsal sulcus nearly always present, becoming rather reduced in some species and absent in three. Mid basitarsal sulcus less frequently developed. Mid and hind tarsi each with a pair of apical spurs, the anterior spur sometimes very reduced, the posterior spur pectinate. Median connection of spiracular plates (of sting apparatus) membranous.

Queen Deciduously winged (ergatoid and brachypterous forms known only in Tetraponera tessmanni). Similar in most respects to workers; mandibles often modified, e.g. with a much expanded apicobasal area or basally geniculate. Genal pit often present, just above mandibular insertions. Ocelli (3) always present. Mid and hind basitarsal sulci more prominent than in workers. Forewing typically with two cubital cells; reductions to one cell occur.

Male Basal margin of mandibles two-thirds or more the length of the masticatory margin, the two often meeting at a rounded corner rather than a sharp apico-basal angle; basal margin with 0, rarely 1, teeth; masticatory margin with 2-6 teeth, generally subequal in size (6 teeth occurring only in larger species, with HW ≥ 1.00). Palp formula and labrum as in workers. Anterior margin of clypeus straight to broadly convex, rarely emarginate; clypeal lobe sometimes dorsomedially protuberant. Antennal sclerites often projecting anterodorsally over the frontal triangle; antennal insertions situated relatively close to the posterior margin of the clypeus (separated by less than the maximum diameter of the antennal fossa). Tibial spurs as in workers. Volsella a small, setose, finger-like lobe; in some species even further reduced and fused to the inner wall of the paramere (where it is quite inconspicuous). Internal face of inner valve (aedeagus) lacking a differentiated, plate-like structure which is separated from the dorsal margin. Wing venation as in queen. Antennae in pupa passing laterally on either side of the mandibles.

Keys including this Genus

Keys to Subgenera or Species Groups in this Genus

Keys to Species in this Genus

Species groups

Distribution

Distribution and Richness based on AntMaps

Biology

Ward (2001) - Some species of Tetraponera can show remarkable variation in size and shape, both within populations and over larger geographical scales. Thus, progress on the species-level taxonomy of these ants requires the analysis of geographically extensive population samples, and an appreciation of the potential for species to show substantial phenotypic variation.

Most collections of Indo-Australian Tetraponera consist of isolated workers, unassociated with sexual alates, and often lacking biological data. Our knowledge of the ecology and behavior of these ants would be enhanced if more emphasis were placed on the procurement of nest series. This would also allow the accumulation of worker-associated queens and males, whose characteristics may prove to be more reliable for delimiting species. Males are known for only about half the species (and in small sample sizes for some of these) but the available data indicate that the genitalia provide good diagnostic traits for some species and clades.

Castes

Morphology

Worker Morphology

 • Antennal segment count 12 • Antennal club absent • Palp formula 6,4; 4,3; 3,3 • Total dental count 3-6(0-2) • Spur formula 2 pectinate, 2 pectinate; 2 (1 simple-barbulate, 1 barbulate-pectinate), 2 (1 simple-barbulate, 1 pectinate); 2 simple, 2 (1 simple, 1 pectinate); 1 simple, 2 (1 simple, 1 pectinate) • Eyes present • Scrobes absent • Sting present

Karyotype

Species Uncertain

  • Tetraponera sp.2: 2n = 42 (Malaysia) (Imai et al., 1983).
  • Tetraponera: 2n = 44 (Malaysia) (Goni et al., 1982).

All Karyotype Records for Genus

Explore Karyotype Data: All, Drilldown
Taxon Haploid Diploid Karyotype Locality Source Notes
Tetraponera 42 Malaysia Imai et al., 1983
Tetraponera 44 Malaysia Goni et al., 1982
Tetraponera allaborans 16 Taiwan Hung et al., 1972

Nomenclature

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

  • TETRAPONERA [Pseudomyrmecinae]
    • Tetraponera Smith, F. 1852: 44. Type-species: Tetraponera atrata (junior synonym of Eciton nigrum), by subsequent designation of Wheeler, W.M. 1911f: 173.
    • Tetraponera junior synonym of Pseudomyrma: Roger, 1863b: 24; Mayr, 1863: 451.
    • Tetraponera junior synonym of Sima: Dalla Torre, 1893: 53; Bingham, 1903: 107; Emery, 1917a: 95.
    • Tetraponera subgenus of Sima: Emery, 1900d: 673; Emery, 1915b: 266; Emery, 1921f: 24.
    • Tetraponera as genus: Smith, F. 1877b: 68; Donisthorpe, 1916b: 244; Wheeler, W.M. 1922a: 654; Taylor & Brown, D.R. 1985: 17; Ward, 1990: 470.
    • Tetraponera senior synonym of Sima: Smith, F. 1877b: 68; Donisthorpe, 1916b: 244; Wheeler, W.M. 1920: 47; Wheeler, W.M. 1922a: 105.
    • Tetraponera senior synonym of Pachysima, Parasima, Sima, Viticicola: Ward, 1990: 470.
  • PACHYSIMA [junior synonym of Tetraponera]
    • Pachysima Emery, 1912b: 97 [as subgenus of Sima]. Type-species: Tetraponera aethiops, by monotypy.
    • Pachysima raised to genus: Wheeler, W.M. 1918c: 308 (footnote); Wheeler, W.M. 1922a: 112, 654.
    • Pachysima subgenus of Sima: Emery, 1921f: 22.
    • Pachysima junior synonym of Tetraponera: Ward, 1990: 470.
  • PARASIMA [junior synonym of Tetraponera]
    • Parasima Donisthorpe, 1948d: 592 [as subgenus of Tetraponera]. [Unnecessary replacement name for Sima in the sense of Emery, 1921f: 23.]
    • Parasima junior synonym of Tetraponera: Ward, 1990: 470.
  • SIMA [junior synonym of Tetraponera]
    • Sima Roger, 1863a: 178. Type-species: Sima compressa (junior synonym of Pseudomyrma allaborans), by monotypy.
    • [Type-species not Eciton rufonigrum, unjustified subsequent designation by Emery, 1915b: 266, repeated in Emery, 1917a: 95 Emery, 1921f: 22.]
    • Sima revived status as genus: Dalla Torre, 1893: 53; Emery, 1917a: 95; Forel, 1917: 240; Emery, 1921f: 21.
    • Sima junior synonym of Tetraponera: Smith, F. 1877b: 68; Donisthorpe, 1916b: 244; Wheeler, W.M. 1920: 47; Wheeler, W.M. 1922a: 105; Ward, 1990: 470.
  • VITICICOLA [junior synonym of Tetraponera]
    • Viticicola Wheeler, W.M. 1919i: 130. Type-species: Sima tessmanni, by original designation.
    • Viticicola junior synonym of Tetraponera: Ward, 1990: 470.
  • [Viticola Donisthorpe, 1943g: 735, incorrect subsequent spelling.]

Ward (2001) - Tetraponera is one of three genera in the ant subfamily Pseudomyrmecinae. The workers of this genus have the following characteristics:

1. Mandible short, usually with 3-4 (rarely 5-6) teeth on the masticatory margin and 0-2 small teeth on the basal margin; basal margin lacking proximal tooth (Figs 6-7).

2. Palp formula 6,4 (reduced to 4,3 in one African species).

3. Posteromedial margin of clypeus not prolonged backwards between the frontal carinae.

4. Anterodorsal surface of median portion of clypeus continuous, non-truncate (in contrast to Pseudomyrmex), its anterior margin with a line of clypeal setae, and varying from straight and entire to protruding and dentate (e.g. Figs 8-18, 61-64).

5. Median lobe of antennal sclerite expanded laterally and covering most of the basal condyle of the antenna when head is observed in full-face view.

6. Antenna 12-segmented.

7. Scape short, less than three-quarters ofhead length (SI2 0.38-0.68 in Oriental/Australian species).

8. Frontal carinae relatively well separated, the minimum distance between them greater than basal scape width (FCI 0.08-0.20 in Oriental/Australian species).

9. Compound eye relatively large (REL 0.25-0.53 in Oriental/ Australian species), width of eye two-thirds or more of length.

10. Ocelli present (usually 3) or absent.

11. Pronotum and mesonotum not fused, freely articulating with one another.

12. Mesopropodeal impression usually well marked, sometimes containing a plate-like sclerite, apparently of metanotal origin.

13. Propodeal spiracle circular to elongate, located well forward on upper third of propodeum.

14. Metapleural gland well developed, the opening directed ventrolaterally or posterolaterally, and preceded by an impression along the lower margin of the metapleuron, whose dorsal margin is marked by an oblique longitudinal carina.

15. Metabasitarsal sulcus nearly always present, reduced in some species (absent in three African species).

16. Meso- and metatibiae each with a pair of the apical spurs, the posterior spur well developed and pectinate, the anterior spur smaller, sometimes very reduced.

17. Terga and sterna of abdominal segments II (petiole), III (postpetiole) and IV not laterally fused.

18. Postpetiole distinctly developed.

19. Pupa naked.

20. Larva with trophothylax (food pocket) on ventral surface of thorax.

For practical purposes workers of Tetraponera can be distinguished from those of all other ants by the combination of well-developed postpetiole, short mandibles, large oval eyes, and a flexible promesonotal suture.

References

  • Arnold, G. 1917. A monograph of the Formicidae of South Africa. Part III. Myrmicinae. Ann. S. Afr. Mus. 14: 271-402 (page 180, Tetraponera subgenus of Sima)
  • Bingham, C. T. 1903. The fauna of British India, including Ceylon and Burma. Hymenoptera, Vol. II. Ants and Cuckoo-wasps. London: Taylor and Francis, 506 pp. (page 107, Tetraponera as junior synonym of Sima)
  • Bolton, B. 1994. Identification guide to the ant genera of the world. Cambridge, Mass.: Harvard University Press, 222 pp. (page 184, Tetraponera as genus)
  • Bolton, B. 2003. Synopsis and Classification of Formicidae. Mem. Am. Entomol. Inst. 71: 370pp (page 136, Tetraponera as genus)
  • Dalla Torre, K. W. von. 1893. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus. Vol. 7. Formicidae (Heterogyna). Leipzig: W. Engelmann, 289 pp. (page 53, Tetraponera junior synonym of Sima)
  • Donisthorpe, H. 1916d. Synonymy of some genera of ants. [part]. Entomol. Rec. J. Var. 28: 241-244 (page 244, Tetraponera senior synonym of Sima; Tetraponera as genus)
  • Emery, C. 1900d. Formiche raccolte da Elio Modigliani in Sumatra, Engano e Mentawei. [part]. Ann. Mus. Civ. Stor. Nat. 40[=(2(20): 689-720 (page 673, Tetraponera subgenus of Sima)
  • Emery, C. 1915b. Sima oder Tetraponera? Zool. Anz. 45: 265-266 (page 266, Tetraponera subgenus of Sima)
  • Emery, C. 1917a. Questions de nomenclature et synonymies relatives à quelques genres et espèces de Formicides (Hym.). Bull. Soc. Entomol. Fr. 1917: 94-97 (page 95, Tetraponera senior synonym of Sima)
  • Emery, C. 1921c. Hymenoptera. Fam. Formicidae. Subfam. Myrmicinae. [part]. Genera Insectorum 174A:1-94 94: 1-94 + 7 (page 24, Tetraponera in Myrmicinae, Pseudomyrmimi; Tetraponera subgenus of Sima)
  • Forel, A. 1917. Cadre synoptique actuel de la faune universelle des fourmis. Bull. Soc. Vaudoise Sci. Nat. 51: 229-253 (page 240, Tetraponera in Myrmicinae, Pseudomyrmimi; Tetraponera subgenus of Sima)
  • Mayr, G. 1863a. Formicidarum index synonymicus. Verh. K-K. Zool.-Bot. Ges. Wien 13: 385-460 (page 451, Tetraponera as junior synonym of Pseudomyrma)
  • Roger, J. 1863b. Verzeichniss der Formiciden-Gattungen und Arten. Berl. Entomol. Z. 7(B Beilage: 1-65 (page 24, Tetraponera as junior synonym of Pseudomyrma)
  • Smith, F. 1852. Descriptions of some hymenopterous insects captured in India, with notes on their economy, by Ezra T. Downes, Esq., who presented them to the Honourable the East India Company. Ann. Mag. Nat. Hist. 2(9): 44-50 (page 44, Tetraponera as genus)
  • Smith, F. 1857a. Catalogue of the hymenopterous insects collected at Sarawak, Borneo; Mount Ophir, Malacca; and at Singapore, by A. R. Wallace. [part]. J. Proc. Linn. Soc. Lond. Zool. 2: 42-88 (page 70, Tetraponera in Formicidae, Poneridae; Tetraponera as genus)
  • Smith, F. 1877b. Descriptions of new species of the genera Pseudomyrma and Tetraponera, belonging to the family Myrmicidae. Trans. Entomol. Soc. Lond. 1877: 57-72 (page 68, Tetraponera senior synonym of Sima; Tetraponera in Myrmicidae; Tetraponera as genus)
  • Taylor, R. W.; Brown, D. R. 1985. Formicoidea. Zool. Cat. Aust. 2:1- 149: 1-149, 30 (page 17, Tetraponera in Pseudomyrmecinae; Tetraponera as genus)
  • Ward, P. S. 1990. The ant subfamily Pseudomyrmecinae (Hymenoptera: Formicidae): generic revision and relationship to other formicids. Syst. Entomol. 15: 449-489 (page 470, Tetraponera senior synonym of Pachysima, Parasima, Sima, Vitticola; Tetraponera as genus)
  • Ward, P. S. 2001. Taxonomy, phylogeny and biogeography of the ant genus Tetraponera (Hymenoptera: Formicidae) in the Oriental and Australian regions. Invertebrate Taxonomy 15:589-665.
  • Ward, P. S. 2006b. The ant genus Tetraponera in the Afrotropical region: synopsis of species groups and revision of the T. ambigua-group (Hymenoptera: Formicidae). Myrmecologische Nachrichten 8:119-130.
  • Ward, P. S. 2009. The ant genus Tetraponera in the Afrotropical region: the T. grandidieri group (Hymenoptera: Formicidae). Journal of Hymenoptera Research 18:285-304.
  • Wheeler, W. M. 1911g. A list of the type species of the genera and subgenera of Formicidae. Ann. N. Y. Acad. Sci. 21: 157-175 (page 173, Type-species: Tetraponera atrata (junior synonym of Tetraponera nigra), by subsequent designation)
  • Wheeler, W. M. 1922b. Ants of the American Museum Congo expedition. A contribution to the myrmecology of Africa. II. The ants collected by the American Museum Congo Expedition. Bull. Am. Mus. Nat. Hist. 45: 39-269 (page 105, Tetraponera senior synonym of Sima.)
  • 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 654, Tetraponera in Pseudomyrminae; Tetraponera as genus)