Filling gaps in global myrmecology: ants of the Kingdom of Bahrain (Hymenoptera: Formicidae) Author Sharaf, Mostafa R. Department of Plant Protection, College of Food and Agriculture Sciences, King Saud University, Riyadh, Kingdom of Saudi Arabia; & Division of Invertebrate Zoology, American Museum of Natural History, New York, NY, USA; Author Wetterer, James K. Wilkes Honors College, Florida Atlantic University, Jupiter, FL, USA; Author Mohamed, AbdulAziz M. A. Agriculture Affairs, Ministry of Municipalities Affairs and Agriculture, Kingdom of Bahrain; Author Georgiadis, Christos Section of Zoology-Marine Biology and Zoological Museum, Department of Biology, National and Kapodistrian University of Athens, Athens, Greece; Author Nasser, Mohamed G. Research Laboratory of Biogeography and Wildlife Parasitology (RLBWP), Department of Entomology, Faculty of Science, Ain Shams University, Abbassia, Egypt Author Aldawood, Abdulrahman S. Department of Plant Protection, College of Food and Agriculture Sciences, King Saud University, Riyadh, Kingdom of Saudi Arabia; text Journal of Natural History 2024 2024-09-16 58 41 - 44 1705 1786 http://dx.doi.org/10.1080/00222933.2024.2388791 journal article 10.1080/00222933.2024.2388791 1464-5262 14241324 Monomorium subopacum ( Smith, 1858 ) ( Figure 30 ) Myrmica subopaca Smith, 1858 , p. 127 (w.q.) Portugal ( Madeira I.). Palaearctic. Diagnosis Worker. This species can be recognised by the following characters: colour brown, varying in shade but usually gaster darker than head and mesosoma; eyes with 9–11 ommatidia in longest row; mesosoma in profile with metanotal groove feebly impressed; cephalic dorsum without standing setae behind level of frontal; mesosoma without standing setae; petiole and postpetiole each with a single pair of setae; first gastral tergite with an apical transverse row of setae; cephalic surface reticulate-granulate to shagreenate-punctulate. Material examined Four sites: 2; 9; 15; 31. Geographic range. Species widely distributed in North Africa, the Mediterranean Basin, and the Afrotropical, Malagasy, and Oriental regions ( Bolton 1987 ). On the Arabian Peninsula, the species was recorded from the KSA ( Collingwood 1985 ; Sharaf et al . Figure 30. Monomorium subopacum . Worker. (A) Body in profile. (B) Head in full-face view, ANTWEB1041896, AntWeb.org (Michele Esposito). (C) Distribution map. 2023), Oman ( Collingwood and Agosti 1996 ; Sharaf et al . 2018b ), Yemen ( Collingwood and Agosti 1996 ), the UAE ( Collingwood et al . 2011 ), and Qatar ( Sharaf et al . 2020a ). Ecology and biology. Little is known about the ecology and biology of the species, but it was reported from a highly degraded site on the Canary Island at 850 m ( Espadaler 2007 ), whereas in Oman it was found foraging next to an Acacia tree in a dry valley ( Sharaf et al . 2018b ). The species was described as halophilic in the Sahara ( Barech et al . 2017 ), but it was not collected from saline habitats on the Arabian Peninsula.