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This work was done as a key to the literature and an aid to curating the author's personal collection and the Streptaxidae collection of the Academy of Natural Sciences of Philadelphia (ANSP).
According to ANSP procedures, families are curated as a unit. Following the most recent literature, judged to be quality work, subfamilies are arranged alphabetically within the families; genera arranged alphabetically within subfamilies; and species, likewise, are arranged alphabetically within the genera. Names that have been associated with a species, i.e. synonyms, forms, subspecies, etc. are arranged alphabetically under the species. This system is primarily for ease of storage and retrieval. For study purposes, the specimens are withdrawn and grouped in any desired manner.