Chamberlin-1920
Guides
Semionellus
Semionellus is a genus of flat-backed millipedes in the family Xystodesmidae, established by Chamberlin in 1920. The genus contains at least three described species: S. michiganus, S. placidus, and S. tertius. Members are found in the north-central and northeastern United States, including Michigan, Indiana, Ohio, Minnesota, and Maryland. As xystodesmid millipedes, they share the characteristic flattened body form typical of this diverse family of polydesmidan millipedes.
Spirembolus
Spirembolus is a genus of sheet web spiders in the family Linyphiidae, first described by Ralph Vary Chamberlin in 1920. The genus contains 41 species distributed across North America, with records from the United States, Canada, and Mexico. These spiders are small-bodied web-builders characteristic of the sheet weaver guild. The genus has been subject to taxonomic revision, with many species described by A.F. Millidge in 1980.