Known from a single worker, nothing is known about the biology of Hypoponera traegaordhi.
- 1 Identification
- 2 Distribution
- 3 Biology
- 4 Castes
- 5 Nomenclature
- 6 References
- 7 References based on Global Ant Biodiversity Informatics
Bolton and Fisher (2011) - H. traegaordhi appears to be very close to the Ethiopian species Hypoponera exigua. The two uniquely share the presence of a transverse impression that contains cuticular ridges at the base of the posterior surface of the petiole node. These two are separated by the characters given in the key and under exigua. H. traegaordhi also appears to be related to the South African species Hypoponera natalensis and Hypoponera austra, which also possess a transverse impression on the posterior surface of the petiole node, but these lack cuticular ridges within the impression, the scapes are longer and when laid back reach much closer to the midpoint of the posterior margin, the subpetiolar process has a shallow lobe with a defined ventral angle, the disc of the second gastral tergite is more obviously microreticulate, and a weak eye-spot is usually present, though it is generally no more than a tiny featureless disc. The presence of radiating cuticular ridges on the posterior surface of the petiole brings traegaordhi out in the key together with Hypoponera jeanneli, Hypoponera hebes and their relatives, but this appears to be a convergent development because none of these has a transverse impression on the posterior surface of the petiole.
A member of the abeillei group.
Keys including this Species
Distribution based on Regional Taxon Lists
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
Hypoponera inhabit and nest in leaf litter, the surface layer of soil, downed rotten wood, and soil around plant roots. Nests are typically found by turning objects on the ground, like downed wood and rocks, or through the ripping away of bark found on rotting downed wood or at the base of dead trees. Litter samples in tropical areas, especially in moist forested sites, often contain individuals of this genus. All Hypoponera are thought to be predators of small arthropods but published details about their diet are sparse. A lack of information about other aspects of their biology is also typical for most species.
The genus is most diverse in the tropics. Species found in higher latitudes tend to be more widespread, common and abundant than their tropical and subtropical congeners.
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- traegaordhi. Ponera traegaordhi Santschi, 1914e: 6 (w.) SOUTH AFRICA. Combination in P. (Hypoponera): Santschi, 1938b: 79; in Hypoponera: Bolton, 1995b: 216. See also: Bolton & Fisher, 2011: 108.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Bolton and Fisher (2011) - In the original description Santschi says that traegaordhi has “eyes indistinct, reduced to a small point in the anterior quarter”. In the surviving syntype no trace of an eye can be seen and it is suspected that Santschi misinterpreted part of the punctate sculpture.
Bolton and Fisher (2011) - Measurements: HL 0.55, HW 0.43, HS 0.490, SL 0.36, PrW 0.33, WL 0.70, HFL 0.34, PeNL 0.14, PeH 0.30, PeNW 0.22, PeS 0.220. Indices: CI 78, SI 84, PeNI 67, LPeI 47, DPeI 157.
Eyes absent. Apex of scape, when laid straight back from its insertion, conspicuously fails to reach the midpoint of the posterior margin in full-face view; SL/HL 0.65. Gap between apex of scape and midpoint of margin 0.22 × SL, about the apical width of the scape. Cephalic dorsum finely and quite superficially reticulate-punctate. Punctate sculpture on dorsum of mesosoma faint and superficial, the punctures smaller and much less dense than on the head. Mesonotal-mesopleural suture absent. Mesopleuron smooth, its anterior margin bluntly angulate behind the anterior coxa. Metanotal groove entirely absent from dorsum. Dorsa of mesonotum and propodeum with scattered, minute punctures on a glossy surface. Declivity of propodeum separated from sides by blunt angles, not sharply marginate or carinate. Posterior surface of petiole node with a distinct series of short, cuticular ridges that radiate upward from the posterior peduncle across its width. The cuticular ridges terminate dorsally in a darkly coloured, arched transverse rim or carina, much more darkly coloured than the surrounding cuticle. This transverse rim marks the upper boundary of a transverse depression, within which the cuticular ridges are located. With petiole node in profile the anterior and posterior faces are extremely feebly convergent dorsally. Subpetiolar process with an obliquely descending anterior face, a blunt ventral angle and a straight ventral surface that slopes upwards posteriorly. Base of cinctus of second gastral tergite with a continuous row of cross-ribs. Maximum width of first gastral tergite in dorsal view is distinctly less than the width of the second tergite at its midlength. Midline length of second gastral posttergite, from posterior margin of cinctus to apex, is distinctly less than the maximum width of the segment. Disc of second gastral tergite with minute punctures that are relatively close-packed but separated by smooth cuticle, the sclerite appears vaguely microreticulate only in places. First gastral tergite in profile with very short standing setae that project above the level of the decumbent pubescence. Full adult colour yellow.
Syntype worker, SOUTH AFRICA: Natal, Pietermaritzburg, 21.iii.05 (I. Trågärdh) (Naturhistorisches Museum, Basel) [examined].
- Bolton, B. 1995b. A new general catalogue of the ants of the world. Cambridge, Mass.: Harvard University Press, 504 pp. (page 216, Combination in Hypoponera)
- Bolton, B. & Fisher, B.L. 2011. Taxonomy of Afrotropical and West Palaearctic ants of the ponerine genus Hypoponera Santschi. Zootaxa 2843: 1-118. PDF
- Santschi, F. 1914e. Meddelanden från Göteborgs Musei Zoologiska Afdelning. 3. Fourmis du Natal et du Zoulouland récoltées par le Dr. I. Trägårdh. Göteb. K. Vetensk. Vitterh. Samh. Handl. 15: 1-44 (page 6, worker described)
- Santschi, F. 1938b. Notes sur quelques Ponera Latr. Bull. Soc. Entomol. Fr. 43: 78-80 (page 79, Combination in P. (Hypoponera))
References based on Global Ant Biodiversity Informatics
- Arnold G. 1926. A monograph of the Formicidae of South Africa. Appendix. Annals of the South African Museum. 23: 191-295.
- Bolton, B., and B. L. Fisher. "Taxonomy of Afrotropical and West Palaearctic ants of the ponerine genus Hypoponera Santschi (Hymenoptera: Formicidae)." Zootaxa 2843 (2012): 1-118.
- IZIKO South Africa Museum Collection
- Wheeler W. M. 1922. Ants of the American Museum Congo expedition. A contribution to the myrmecology of Africa. VIII. A synonymic list of the ants of the Ethiopian region. Bulletin of the American Museum of Natural History 45: 711-1004