All Simopelta species are nomadic group raiders, convergent with Ecitoninae.
This species occurs in mature montane forest habitats, generally above 1000m elevation. I know it from the upper Peñas Blancas Valley, the 1100m site on the Barva transect in Braulio Carrillo National Park, Wilson Botanical Garden near San Vito, and the Bocas del Toro area of Panama. I also have one collection given to me by Bill Brown from Valle, Colombia. He identified it as an undescribed species, but it matches my concept of paeminosa. For one collection (JTL0863) I observed workers and brood caches in the leaf litter. The larvae were of uniform size, and closely matched the "young larva" illustrations in Wheeler and Wheeler (1986, Figs. 11b, 13a, 14c). Another collection (JTL4360) was a colony in a clump of dirt in the middle of a recent clearing in mature forest. I tried excavating it and found workers and larvae scattered in the dirt mound, but I never found a queen.
Costa Rica (type locality), Panama, Colombia. Costa Rica: montane sites from Cordillera de Tilarán southward.
Mandible with two apical teeth and large basal tooth, basal tooth short with broad base (unlike oculata, JTL-002); eye relatively small (unlike oculata); anteromedial clypeal projection bluntly rounded, not triangular; face and mesosoma with coarse, irregular rugae (unlike all other species); head relatively broad, head width/head length greater than 0.8.
Taxonomic history
Combination in Belonopelta: Baroni Urbani, 1975b PDF: 300.Combination in Simopelta: Bolton, 1995b: 383.See also: Mackay & Mackay, 2008b PDF: 315.
