Lophomyrmex quadrispinosus

Bolton (pers. comm.) found this species rather abundant in Sri Lanka, where it was foraging on the ground in coconut plantations. It is also easily collected by means of sugar bait. (Rigato 1994)

Identification
A member of the Lophomymrex quadrispinosus group.

Distribution based on Regional Taxon Lists
Oriental Region: India, Sri Lanka. Palaearctic Region: China, Israel.

Nomenclature

 *  quadrispinosus. Oecodoma quadrispinosa Jerdon, 1851: 111 (w.) INDIA. Rigato, 1994a: 59 (q.m.); Wheeler, G.C. & Wheeler, J. 1954a: 131 (l.). Combination in Pheidole: Smith, F. 1858b: 174; in Lophomyrmex: Emery, 1892a: 114. Senior synonym of taprobanae: Rigato, 1994a: 59. See also: Bingham, 1903: 195.
 * taprobanae. Lophomyrmex quadrispinosus var. taprobanae Forel, 1911i: 223 (w.q.m.) SRI LANKA. Raised to species: Ettershank, 1966: 134. Junior synonym of quadrispinosus: Rigato, 1994a: 59.

Worker
Rigato (1994) - TL 2.5-3.5, HL 0.67-0.88, HW 0.60-0.84, CI 89-99, SL 0.55-0.69, SI 75-84. PW 0.40-0.60, AL 0.72-1.03, SpL 0.16-0.26, HTL 0.55-0.75, TI 83-94 (93 measured).

With the characters given in the key and the following: Mesonotum in profile with a well-developed prominence and with a clear posterior step, sometimes ridged. Metanotal groove distinctly notched in profile. Propodeal spines in profile slightly bent downward and gradually tapering toward the apex. Petiolar node in profile usually briefly obliquely truncate or subtruncate.

Clypeus sublucid, except for its posteriormost median portion which is shining. Frontal triangle sublucid. Head strongly shining, with very feeble ground sculpture. Genae and frontal lobes more or less longitudinally rugulose. Rarely large specimens with head finely and irregularly longitudinally rugulose and sublucid. Anterior pronotal slope appearing transversely rugulose in dorsal view; the rugulae are stronger at the sides and often fade out at the midline. Pronotal dorsum, between the teeth, faintly reticulate and quite shining. Pronotal sides shining. Mesopleurae and propodeum, except the declivity, reticulate and opaque; mesonotum less distinctly sculptured. Petiole and postpetiole reticulate. Gaster glassy smooth, shining. Colour bright brownish yellow, cephalic dorsum usually darker, gaster often wholly infuscated, sometimes dark brown.

Queen
Rigato (1994) - TL approximately 9.5. Propodeal spines strong, short and with blunt apices. Petiolar node in profile triangular, with a rounded summit. Rather opaque throughout, with the exception of a central clypeal strip, frontal triangle and mesopleuron which are quite shining. Head with a strong ground reticulation and superimposed longitudinal rugulae more developed on the genae and frons. Scutum densely punctured and reticulate, subopaque with a sublucid midline. Axillae finely reticulate and opaque. Scutellum sublucid. Metanotum and propodeum, excluding the declivity, opaque. Petiole and postpetiole finely reticulate. Gaster densely and finely punctured, sublucid.

Colour dark brown. Wings uniformly moderately infuscated.

Male
Rigato (1994) - TL 6.3-6.5. Very similar to the female in sculpture, pilosity, pubescence, and colour.

Mandibles not serrated. Propodeal teeth very short. Petiolar node in profile thick and low. Rugulae on the head rare. Scutum sublucid, finely punctured. Gaster quite shining.

Type Material
Rigato (1994) - Syntype workers, India [probably lost].

References based on Global Ant Biodiversity Informatics

 * Amarasinghe H. E. 2010. Species composition and nesting habits of ants in a hill-country home garden in Sri Lanka. Asian Myrmecology 3: 9-20.
 * Bharti H., Y. P. Sharma, M. Bharti, and M. Pfeiffer. 2013. Ant species richness, endemicity and functional groups, along an elevational gradient in the Himalayas. Asian Myrmecology 5: 79-101.
 * Borowiec L. 2014. Catalogue of ants of Europe, the Mediterranean Basin and adjacent regions (Hymenoptera: Formicidae). Genus (Wroclaw) 25(1-2): 1-340.
 * 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
 * Dad J. M., S. A. Akbar, H. Bharti, and A. A. Wachkoo. 2019. Community structure and ant species diversity across select sites ofWestern Ghats, India. Acta Ecologica Sinica 39: 219–228.
 * Dias R. K. S. 2002. Current knowledge on ants of Sri Lanka. ANeT Newsletter 4: 17- 21.
 * Dias R. K. S. 2006. Current taxonomic status of ants (Hymenoptera: Formicidae) in Sri Lanka. The Fauna of Sri Lanka: 43-52. Bambaradeniya, C.N.B. (Editor), 2006. Fauna of Sri Lanka: Status of Taxonomy, Research and Conservation. The World Conservation Union, Colombo, Sri Lanka & Government of Sri Lanka. viii + 308pp.
 * Dias R. K. S. 2013. Diversity and importance of soil-dweeling ants. Proceedings of the National Symposium on Soil Biodiversity, chapt 4, pp 19-22.
 * Dias R. K. S., K. R. K. A. Kosgamage, and H. A. W. S. Peiris. 2012. The Taxonomy and Conservation Status of Ants (Order: Hymenoptera, Family: Formicidae) in Sri Lanka. In: The National Red List 2012 of Sri Lanka; Conservation Status of the Fauna and Flora. Weerakoon, D.K. & S. Wijesundara Eds., Ministry of Environment, Colombo, Sri Lanka. p11-19.
 * Dias R. K. S., and K. R. K. Anuradha Kosgamage. 2012. Occurrence and species diversity of ground-dwelling worker ants (Family: Formicidae) in selected lands in the dry zone of Sri Lanka. J. Sci. Univ. Kelaniya 7: 55-72.
 * Dias R. K. S., and R. P. K. C. Rajapaksa. 2016. Geographic records of subfamilies, genera and species of ants (Hymenoptera: Formicidae) in the four climatic zones of Sri Lanka: a review. J. Sci. Univ. Kelaniya 11(2): 23-45.
 * Dias R. K. S.; Perera K. A. M. 2011. Worker ant community observed by repeated sampling and information on endemic Aneuretus simoni Emery in the Gilimale Forest Reserve in Sri Lanka. Asian Myrmecology 4: 69-78.
 * Dias, R.K.S. 2006. Overview of ant research in Sri Lanka: 2000-2004. ANeT Newsletter 8:7-10
 * Emery C. 1893. Formicides de l'Archipel Malais. Revue Suisse de Zoologie 1: 187-229.
 * Emery C. 1893. Voyage de M. E. Simon à l'île de Ceylan (janvier-février 1892). Formicides. Annales de la Société Entomologique de France 62: 239-258.
 * Ettershank G. 1966. A generic revision of the world Myrmicinae related to Solenopsis and Pheidologeton (Hymenoptera: Formicidae). Aust. J. Zool. 14: 73-171.
 * 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. 1903. Les Formicides de l'Empire des Indes et de Ceylan. Part X. J. Bombay Nat. Hist. Soc. 14: 679-715.
 * Forel A. 1906. Les fourmis de l'Himalaya. Bulletin de la Société Vaudoise des Sciences Naturelles 42: 79-94.
 * Forel A. 1911. Ameisen aus Ceylon, gesammelt von Prof. K. Escherich (einige von Prof. E. Bugnion). Pp. 215-228 in: Escherich, K. Termitenleben auf Ceylon. Jena: Gustav Fischer, xxxii + 262 pp.
 * Forel A. 1913. H. Sauter's Formosa-Ausbeute: Formicidae II. Arch. Naturgesch. (A)79(6): 183-202
 * Guénard B., and R. R. Dunn. 2012. A checklist of the ants of China. Zootaxa 3558: 1-77.
 * Li Q., Y. Chen, S. Wang, Y. Zheng, Y. Zhu, and S. Wang. 2009. Diversity of ants in subtropical evergreen broadleaved forest in Pu'er City, Yunnan. Biodiversity Science 17(3): 233-239.
 * Li Z.h. 2006. List of Chinese Insects. Volume 4. Sun Yat-sen University Press
 * Lu Z., B. D. Hoffmann, and Y. Chen. 2016. Can reforested and plantation habitats effectively conserve SW China’s ant biodiversity? Biodivers. Conserv. DOI 10.1007/s10531-016-1090-1
 * Mathew R. 2003. On Formicidae (Insecta: Hymenoptera) of Nongkhyllem Wild Life Sanctuary, Ri-Bhoi District, Meghalaya. Records of the Zoological Survey of India 101:195-207.
 * Mathew R., and R. N. Tiwari. 2000. Insecta: Hymenoptera: Formicidae. Pp. 251-409 in: Director; Zoological Survey of India (ed.) 2000. Fauna of of Meghalaya. Part 7. [State Fauna Series 4.] Insecta 2000. Calcutta: Zoological Survey of India, 621 pp.
 * Musthak Ali T. M. 1982. Ant fauna (Hymenoptera: Formicidae) of Bangalore with observations on their nesting and foraging habits. Thesis Abstracts. Haryana Agricultural University 8: 370-371.
 * Narendra A., H. Gibb, and T. M. Ali. 2011. Structure of ant assemblages in Western Ghats, India: role of habitat, disturbance and introduced species. Insect Conservation and diversity 4(2): 132-141.
 * Pajni H. R., and R. K. Suri. 1978. First report on the Formicid fauna (Hymenoptera) of Chandigarh. Res. Bull. (Science) Punjab University 29: 5-12.
 * Parui A. K., S. Chatterjee, and P. Basu. 2015. Habitat characteristics shaping ant species assemblages in a mixed deciduous forest in Eastern India. Journal of Tropical Ecology: 1-14. doi:10.1017/S0266467415000036
 * Rajan P. D., M. Zacharias, and T. M. Mustak Ali. 2006. Insecta: Hymenoptera: Formicidae. Fauna of Biligiri Rangaswamy Temple Wildlife Sanctuary (Karnataka). Conservation Area Series, Zool. Surv. India.i-iv,27: 153-188.
 * Rigato F. 1994. Revision of the myrmicine ant genus Lophomyrmex, with a review of its taxonomic position (Hymenoptera: Formicidae). Systematic Entomology 19: 47-60.
 * Sheela S., and S. N. Ghosh. 2009. A new species of Lophomyrmex Emery (Hymenoptera: Formicidae) from India with a key to Indian species. Biosystematica 2(2): 17-20.
 * Song Y., Z. H. Xu, C. L. Li, Y. Q. Hao, and H. B. Li. 2014. Ant communities of Nangun River Nature Reserve in Yunnan. Journal of West China Forestry Science 45(5): 93-100.
 * Song Y., Z. Xu, C. Li, N. Zhang, L. Zhang, H. Jiang, and F. Mo. 2013. An Analysis on the Ant Fauna of the Nangun river Nature Reserve in Yunnan, China. Forest Research 26(6): 773-780.
 * Tak N., and S. I. Kazmi. 2013. On some ants (Insecta: Hymenoptera: Formicidae) from Nagaland, India. Rec. zool. Surv. India: 113(1): 169-182.
 * Tiwari R. N. 1999. Taxonomic studies on ants of southern India (Insecta: Hymenoptera: Formicidae). Memoirs of the Zoological Survey of India 18(4): 1-96.
 * Tiwari R. N., B. G. Kundu, S. Roy Chowdhury, and S. N. Ghosh. 2003. Insecta: Hymenoptera: Formicidae. Fauna of Sikkim. Part 4. State Fauna Series. 9.Zool.Surv.India. i-iii, 1-512. Chapter pagination: 467-506.
 * Tiwari R.N., B.G. Kundu, S. Roychowdhury, S.N. Ghosh. 1999. Insecta: Hymenoptera: Formicidae. Pp. 211-294 in: Director; Zoological Survey of India (ed.) 1999. Fauna of West Bengal. Part 8. Insecta (Trichoptera, Thysanoptera, Neuroptera, Hymenoptera and Anoplura). Calcutta: Zoological Survey of India, iv + 442 pp.
 * Tiwari, R.N. 1999. Taxonomic studies on ants of southern India (Insecta: Hymenoptera: Formicidae). Memoirs of the Zoological Survey of India 18(4):1-96
 * Varghese T. 2004. Taxonomic studies on ant genera of the Indian Institute of Science campus with notes on their nesting habits. Pp. 485-502 in : Rajmohana, K.; Sudheer, K.; Girish Kumar, P.; Santhosh, S. (eds.) 2004. Perspectives on biosystematics and biodiversity. Prof. T.C. Narendran commemoration volume. Kerala: Systematic Entomology Research Scholars Association, xxii + 666 pp.
 * Wheeler W. M. 1936. Ecological relations of ponerine and other ants to termites. Proceedings of the American Academy of Arts and Sciences. 71: 159-243.
 * Xu Z. H., B. L. Yang, and G. Hu. 1999. Formicidae ant communities in fragments of montane rain forest in Xishuangbanna, China. Zoological Research 20(4): 288-293.
 * Xu Z., Liu T.-Y., He Y.-F. and Zeng G.. 1998. A comparative study on the ant communities in primeval and secondary forests of four vegetation subtypes in Xishuangbanna of China. Zoological Research 20: 360-364.