A new Tapinoma species (Hymenoptera: Formicidae) in the lugubre species-group from the Philippines

A new species of the ant genus Tapinoma Foerster, 1850, with a peaked propodeal dorsum, namely T. paxi sp. nov., is described from a remnant forest patch on Palawan Island, Philippines, and placed in the lugubre species-group. In addition, T. acuminatum Forel, 1907, known from Kenya, Tanzania, and Rwanda, was determined to belong to the lugubre species-group, which now includes six members. A global key to species-group members is presented. Finally, the conservation value of remnant forest patches is discussed.