Sigmoria
Guides
Furcillaria
Furcillaria is a genus of flat-backed millipedes established by Shelley in 1981 within the family Xystodesmidae. It originally comprised four species from the eastern United States: Furcillaria aequalis, F. convoluta, F. laminata, and F. thrinax. In 2021, taxonomic authorities reevaluated the genus and deemed it a junior synonym of Sigmoria, a decision now reflected in major databases such as the Catalogue of Life. Some sources, including GBIF and NCBI, continue to list Furcillaria as accepted, reflecting ongoing taxonomic debate or lag in database updates. The genus belongs to the tribe Apheloriini, a group of xystodesmid millipedes characterized by complex gonopod morphology.
Sigmoria aequalis
Sigmoria aequalis is a species of flat-backed millipede in the family Xystodesmidae, described by Shelley in 1981. It belongs to the order Polydesmida, a large and diverse group of millipedes characterized by their flattened body form. The genus Sigmoria is part of the tribe Apheloriini within the subfamily Rhysodesminae, a predominantly North American lineage of xystodesmid millipedes.