Taxonomically-problematic
Guides
Blastobasis
Blastobasis is the type genus of the moth family Blastobasidae (Gelechioidea), containing approximately half of all described species in that family. The genus is taxonomically problematic: its monophyly is seriously doubted, with many presumed relatives separated into small or monotypic genera that may represent specialized lineages within a broader Blastobasinae assemblage. Some formerly independent genera, including Agnoea, Auximobasis, Euresia, and Zenodochium, are variably included or excluded by different authors. Species occur across multiple continents with diverse larval habits, including acorn borers in oaks and stem borers in grasses.
Hypocaccus
clown beetles
Hypocaccus is a genus of clown beetles (family Histeridae) established by C.G. Thomson in 1867. The genus comprises more than 120 described species distributed across multiple continents. Taxonomic classification within the genus remains problematic, with several subgenera recognized but inter-relationships and diagnostic characters still under study. Species exhibit considerable morphological diversity, with some individuals showing atypical combinations of characters that complicate subgeneric assignment.
Phymatura
Phymatura is a genus of rove beetles (Staphylinidae) in the subfamily Aleocharinae, tribe Homalotini, subtribe Bolitocharina. The genus was erected by Sahlberg in 1876. At least five species are now recognized globally, including P. blanchardi, P. brevicollis, P. japonica, and P. russa. Taxonomic boundaries within the genus remain problematic and require further study, including DNA analysis.
Zanclognatha
litter moths
Zanclognatha is a genus of litter moths in the family Erebidae, subfamily Herminiinae. The genus was erected by Julius Lederer in 1857 and has experienced taxonomic instability, having been synonymized with Polypogon multiple times before current treatments generally recognize it as distinct. Species-level taxonomy remains problematic, with adult moths often difficult to distinguish using traditional characters. The genus contains approximately 25 described species distributed across the Northern Hemisphere.