Dubious macaw species

On the page for the genus Ara, if one looks at the extinct species, the hypothetical extinct species Ara atwoodi, autochtones, erythrocephala, gossei, and guadaloupensis can be found, despite little historical evidence for their existence; indeed while their pages have an IUCN listing as extinct for them, the species themselves have no IUCN page and Birdlife International doesn’t recognize them either. Why might they be included then?

I started a flag on the taxon https://www.inaturalist.org/flags/517312

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Please add comments on the flag: https://www.inaturalist.org/flags/517312