fortis belong to the third architectural group, united by the construction of domed nests similar to hypothesized relatives.

palliata, these likely represent independent derivations of the rim-suspended architecture. hyperythra is more closely related to Schistocichla than to M. laemosticta are rim-suspended, open cups made of fibers, similar to those of M. hemimelaena have unique architectural characters which may prove to be phylogenetically informative. The majority of described nests (eight) belong to the first category, but the nests of M. We identify three distinct nest architectures within the group: bulky, bottom-supported, open cups of coarse vegetative matter rim-suspended open cups of neatly woven fine materials and bulky domed nests made of coarse vegetative materials. laemosticta, based on three nests found in Costa Rica. We review published information on the nests and eggs of members of the polyphyletic genus of antbirds, Myrmeciza, and present the first descriptions of nests and eggs of the Dull-mantled Antbird M.

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