Siduminidae

Siduminidae is a taxonomic name that has appeared in some classifications as a family of arthropods. The group is poorly defined in modern sources, and its recognition as a formal family is not consistent across taxonomic databases. Because the term has been used infrequently and with varying scope, many contemporary references treat Siduminidae as invalid or unresolved rather than as a widely accepted clade.

Historical usage of the name has varied. In some taxonomic treatments, Siduminidae was introduced to describe a small assemblage of genera or species based on particular morphological features. Over time, subsequent revisions and new phylogenetic methods have led many researchers to reassign the included taxa to other, better-established families, or to abandon the name altogether. As a result, there is no single, universally accepted circumscription for Siduminidae.

Current status and references: In major online catalogs and checklists, Siduminidae is generally not recognized as a valid family. When it appears, it is usually labelled as dubious, doubtful, or obsolete, and may be listed as a synonym or as a missing taxon in need of reevaluation. Because of the uncertain provenance and lack of consistent diagnosis, researchers who encounter Siduminidae should verify the sense in which the term is used in the source, and consult the latest taxonomic revisions or databases for clarification.