Pakkuitidae
Pakkuitidae is a taxonomic family name used in paleontology to classify a group of fossil organisms. The group is known only from fossil material, and there is no living representative. The placement of Pakkuitidae within higher taxa is uncertain; authors have variably assigned it to different invertebrate groups and have debated its validity as a family. Diagnostic features are poorly constrained because the available fossils are fragmentary or poorly preserved. As a result, the definition of the family and its included genera has changed over time, with some researchers considering Pakkuitidae to be a distinct clade, while others treat it as a nomen dubium or as a synonym of another family.
The geographic and stratigraphic distribution of the taxon is incompletely known; reported occurrences (when present) come
In summary, Pakkuitidae is a poorly understood, and somewhat controversial, fossil family whose recognition depends on