Known from a few collections, all from rainforest litter-samples. In Hong Kong it is a widespread species found in diverse habitats including grasslands, shrublands, plantations (e.g. L. confertus), urban forest remnants, secondary forest, and Feng Shui woods. Specimens were collected at elevation ranging from 19 to 630 m (Tang et al., 2019).
- 1 Identification
- 2 Distribution
- 3 Biology
- 4 Castes
- 5 Nomenclature
- 6 References
- 7 References based on Global Ant Biodiversity Informatics
Bolton (2000) - A member of the Strumigenys sauteri-group. Within this group the three species sauteri, Strumigenys arges and Strumigenys brontes form a complex of closely related forms. All share the dentition described in the introduction to the group and have a characteristic clypeal shape. In full-face view the lateral margins are convex, especially in the anterior half where they curve inwards toward the anterolateral angles; the latter are narrowly rounded and project strongly forward. Between them the anterior margin proper is deeply and evenly concave. The outer margins of the fully closed mandibles intersect the anterior clypeal margin in its concave portion, just mesad of the anteriormost points of the anterolateral clypeal angles.
Of the three species arges and sauteri have the leading edge of the scape with an evenly convex shallow curvature in the basal half. In brontes the leading edge is very broad at about the basal third where it forms a strongly prominent angle, distal to which the margin is shallowly concave. S. brontes also completely lacks basigastral costulae, which in sauteri and arges are visible at least laterally on the limbus. The last two species separate quite well by their sculpture. In sauteri the metapleuron and side of the propodeum are uniformly finely punctate, whilst in arges these areas are mostly or entirely smooth and shining. Most populations of sauteri also have the mesopleuron punctate at least in part, though a few are known where this sclerite is smooth. In arges the mesopleuron always lacks punctate sculpture.
The depository of the holotype worker of sauteri was unknown for many years, and Forel’s misleading original description, in which he miscounted the number of antennal segments, did nothing to facilitate the establishment of its real identity. The rediscovery and redescription of the holotype by Brown & Boisvert (1979) fixed its identity and showed its relationship to the Japanese species Strumigenys canina. Separation of these two is discussed under the latter name.
Keys including this Species
Distribution based on Regional Taxon Lists
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
Using Malaise traps at various locations in Hong Kong, Tang et al. (2019) collected female alates that had flown from their nests in sampling conducted from mid-March to mid-April.
Strumigenys were once thought to be rare. The development and increased use of litter sampling methods has led to the discovery of a tremendous diversity of species. Many species are specialized predators (e.g. see Strumigenys membranifera and Strumigenys louisianae). Collembola (springtails) and other tiny soil arthropods are typically favored prey. Species with long linear mandibles employ trap-jaws to sieze their stalked prey (see Dacetine trap-jaws). Larvae feed directly on insect prey brought to them by workers. Trophallaxis is rarely practiced. Most species live in the soil, leaf litter, decaying wood or opportunistically move into inhabitable cavities on or under the soil. Colonies are small, typically less than 100 individuals but in some species many hundreds. Moist warm habitats and micro-habitats are preferred. A few better known tramp and otherwise widely ranging species tolerate drier conditions. Foraging is often in the leaf litter and humus. Workers of many species rarely venture above ground or into exposed, open areas. Individuals are typically small, slow moving and cryptic in coloration. When disturbed individuals freeze and remain motionless. Males are not known for a large majority of species.
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- sauteri. Pentastruma sauteri Forel, 1912a: 51 (w.) TAIWAN. Combination in Pyramica: Bolton, 1999: 1673; in Strumigenys: Baroni Urbani & De Andrade, 2007: 127. See also: Brown & Boisvert, 1979: 203. See also: Bolton, 2000: 464.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Bolton (2000) - Holotype worker, TAIWAN: Pilam (H. Sauter) (IPAL) [not seen].
- Baroni Urbani, C. & De Andrade, M.L. 2007. The ant tribe Dacetini: limits and constituent genera, with descriptions of new species. Annali del Museo Civico di Storia Naturale “G. Doria” 99:1-191.
- Bolton, B. 1999. Ant genera of the tribe Dacetonini (Hymenoptera: Formicidae). J. Nat. Hist. 3 33: 1639-1689 (page 1673, combination in Pyramica)
- Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 464, redescription of worker)
- Brown, W. L., Jr.; Boisvert, R. G. 1979 . The dacetine ant genus Pentastruma (Hymenoptera: Formicidae). Psyche (Camb.) 85: 201-207 (page 203, redescription of worker)
- Emery, C. 1924f . Hymenoptera. Fam. Formicidae. Subfam. Myrmicinae. [concl.]. Genera Insectorum 174C: 207-397 (page 326, catalogue)
- Forel, A. 1912a. H. Sauter's Formosa-Ausbeute. Formicidae (Hym.). Entomol. Mitt. 1: 45-61 (page 51, worker described)
- Morisita, M.; Kubota, M.; Onoyama, K.; Ogata, K.; Terayama, M.; Yamauchi, K.; Sonobe, R.; Yamane, 1992. A guide for the identification of Japanese ants. III. Myrmicinae and supplement to Leptanillinae. (Hymenoptera: Formicidae). Tokyo: Myrmecological Soc (page 72, catalogue)
- Ogata, K. 1991b. A generic synopsis of the poneroid complex of the family Formicidae (Hymenoptera). Part II. Subfamily Myrmicinae. Bull. Inst. Trop. Agric. Kyushu Univ. 14: 61-149 (page 136, catalogue)
- Tang, K.L., Pierce, M.P., Guénard, B. 2019. Review of the genus Strumigenys (Hymenoptera, Formicidae, Myrmicinae) in Hong Kong with the description of three new species and the addition of five native and four introduced species records. ZooKeys 831: 1–48 (DOI 10.3897/zookeys.831.31515).
- Terayama, M. 1985c. New records of some ants from the Nansei Islands, Japan. Ari 13: 8 (page 8, catalogue)
- Terayama, M.; Kubota, S. 1989. The ant tribe Dacetini (Hymenoptera, Formicidae) of Taiwan, with descriptions of three new species. Jpn. J. Entomol. 57: 778-792 (page 790, catalogue)
References based on Global Ant Biodiversity Informatics
- Bolton, B. 2000. The Ant Tribe Dacetini. Memoirs of the American Entomological Institute 65
- Brown W. L., Jr. 1949. Revision of the ant tribe Dacetini. I. Fauna of Japan, China and Taiwan. Mushi 20: 1-25.
- Brown W. L., Jr.; Boisvert, R. G. 1979. The dacetine ant genus Pentastruma (Hymenoptera: Formicidae). Psyche 85:201-207.
- 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
- Fellowes J. R., M. W. N. Lau, D. Dudgeon, G. T. Reels, G. W. J. Ades, G. J. Carey, B. P. L. Chan, R. C. Kendrick, L. K. Shing, M. R. Leven, K. D. P. Wilson, and Y. Y. Tung. 2002. Wild animals to watch: terrestrial and freshwater fauna of concervation concern in Hong Kong. Memoirs of the Hong Kong Natural History Society 25: 123-160.
- Fontanilla A. M., A. Nakamura, Z. Xu, M. Cao, R. L. Kitching, Y. Tang, and C. J. Burwell. 2019. Taxonomic and functional ant diversity along tropical, subtropical, and subalpine elevational transects in southwest China. Insects 10, 128; doi:10.3390/insects10050128
- Forel A. 1912. H. Sauter's Formosa-Ausbeute. Formicidae (Hym.) (Schluss). Entomol. Mitt. 1: 45-61.
- Guénard B., and R. R. Dunn. 2012. A checklist of the ants of China. Zootaxa 3558: 1-77.
- Li Z.h. 2006. List of Chinese Insects. Volume 4. Sun Yat-sen University Press
- Liu C, B. Guénard, F Hita Garcia, S. Yamane, B. Blanchard, and E. Economo. New records of ant species from Yunnan, China. Submitted to Zookeys
- Suwabe, Mayuko, Ohnishi, Hitoshi, Kikuchi, Tomonori, Kawara, Kengo and Tsuji, Kazuki. 2009. Difference in seasonal activity pattern between non-native and native ants in subtropical forest of Okinawa Island, Japan. Ecol Res. 24:637-643.
- Tang K.L., Pierce M.P., and B. Guénard. 2019. Review of the genus Strumigenys (Hymenoptera, Formicidae, Myrmicinae) in Hong Kong with the description of three new species and the addition of five native and four introduced species records. ZooKeys 831: 1-48.
- Terayama M. 1985. Trachymesopus darwini (FOREL), Pentastruma sauteri FOREL and Rhopalomastix sp. Were collected from the Nansei Islands; tribe Melissotarsini is new to Japan. Ari 13: 8
- Terayama M. 1992. Structure of ant communities in East Asia. A. Regional differences and species richness. Bulletin of the Bio-geographical Society of Japan 47: 1-31.
- Terayama M. 2009. A synopsis of the family Formicidae of Taiwan (Insecta: Hymenoptera). Research Bulletin of Kanto Gakuen University. Liberal Arts 17:81-266.
- Terayama M., S. Kubota, and K. Eguchi. 2014. Encyclopedia of Japanese ants. Asakura Shoten: Tokyo, 278 pp.
- Terayama M., and S. Kubota. 1989. The ant tribe Dacetini (Hymenoptera, Formicidae) of Taiwan, with descriptions of three new species. Japanese Journal of Entomology 57: 778-792.
- Terayama, M. 2009. A synopsis of the family Formicidae of Taiwan (Insecta; Hymenoptera). The Research Bulletin of Kanto Gakuen University 17: 81-266.
- Terayama. M. and Inoue. N. 1988. Ants collected by the members of the Soil Zoological Expedition to Taiwan. ARI Reports of the Myrmecologists Society (Japan) 18: 25-28
- Wheeler W. M. 1929. Ants collected by Professor F. Silvestri in Formosa, the Malay Peninsula and the Philippines. Bollettino del Laboratorio di Zoologia Generale e Agraria della Reale Scuola Superiore d'Agricoltura. Portici 24: 27-64.
- Xu Z. H., and X. G. Zhou. 2004. Systematic study on the ant genus Pyramica Roger (Hymenoptera, Formicidae) of China. Acta Zootaxonomica Sinica 29: 440-450.
- Xu Z. and X.-G. Zhou. 2004. Systematic study on the ant genus Pyramica Roger (Hymenoptera, Formicidae) of China. Acta Zootaxonomica Sinica 29(3): 440-450.
- Yamane S., S. Ikudome, and M. Terayama. 1999. Identification guide to the Aculeata of the Nansei Islands, Japan. Sapporo: Hokkaido University Press, xii + 831 pp. pp, 138-317.
- Yamane S.; Ikudome, S.; Terayama, M. 1999. Identification guide to the Aculeata of the Nansei Islands, Japan. Sapporo: Hokkaido University Press, xii + 831 pp. pp138-317.