Monomorium dichroum

In Yemen this species was collected from a banana farm where the soil was moist and rich in decaying livestock faeces. Several pselaphine beetles were also observed in the same habitat (Sharaf et al., 2017).

Identification
Worker caste of this species can be confused with the cosmopolitan species Monomorium pharaonis (L., 1758) but it can be separated by the finely longitudinally striated head, the smooth first gastral tergite, and the dark patches in front of the eyes (Sharaf et al., 2017).

Distribution based on Regional Taxon Lists
Afrotropical Region: Socotra Archipelago, Yemen. Oriental Region: India. Palaearctic Region: China, Oman.

Biology
Sharaf et al (2018) - Oman: Several workers were found in leaf litter under a date palm tree where the soil was soft and dry.

Nomenclature

 *  dichroum. Monomorium dichroum Forel, 1902c: 212 (w.q.) INDIA. Imai, Baroni Urbani, et al. 1984: 7 (k.).

References based on Global Ant Biodiversity Informatics

 * Forel A. 1902. Myrmicinae nouveaux de l'Inde et de Ceylan. Rev. Suisse Zool. 10: 165-249.
 * 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. 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. 1908. Fourmis de Ceylan et d'Égypte récoltées par le Prof. E. Bugnion. Lasius carniolicus. Fourmis de Kerguelen. Pseudandrie? Strongylognathus testaceus. Bull. Soc. Vaudoise Sci. Nat. 44: 1-22
 * 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.
 * 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.
 * Ramachandra T. V., M. D. Subash Chandran, N. V. Joshi, A. Narendra, and T. M. Ali. 2012. Ant species composition and diversity in the Sharavathi Rivers basin, central Western Ghats. Sahyadri Conservation Series 3, ENVIS Technical Report 20. 51 pages.