Here is an excerpt of a 19th century book by Professor Rafinesque:
PROFESSOR CONSTANTINE SAMUEL RAFINESQUE (THE PRIMITIVE BLACK NATIONS OF AMERICA 1832)
"The Native American Negroes or black Indians have been seen in Brazil, Guyana, Caraccas, Popayan, Choco, North California and etc:
The Aroras or Caroras of Cumana, were black, but with fine features and long hair, like the Jolofs and Gallas of Africa.
The Esteros latitude 32, are like the Hottentots and the Numuquas, Tambukis, and many other Nigritian tribes, not black, but dark brown, yet complete Negroes, with large thick lips, broad flat noses, and very ugly, with hair crisped or curly. All these tribes live in New California The Aroras or Caroras of Cumana, were black, but with fine features and long hair, like the Jolofs and Gallas of Africa.
The American Negroes of Quarenqua, in Choco, (the great level plain 900 miles long, 90 wide, separating the Andes of South America from the mountains of Panama,) were black and with woolly heads in 1506. They are mentioned by Dangleria, and all the early accurate writers.
The Yemasees or Jamasi were remarkably Black people Notices of Florida and the Campaigns; The Ancient Caracoles of Hayti, represented as a Nation of Beasts by the Historical Songs
The Califurnams of the Carib Islands, called Black Caribs or Guauini by others, are a black branch of Caribs.
The Arquahos of Cutara mentioned by Garcias in the West Indies, quite black.
The Aroras of Raleigh or Yaruras of the Spaniards, ugly black or brown Negroes, yet existing near the Oronoco, and language known, called Monkeys by their neighbors The Chaymas of Guyana, brown Negroes like Hottentots,
The Manjipas and Porcigis of Nienhof, the Motayas of Knivet are all of Brazil, brown Negroes with curly hair.
The Nigritas of Martyr in Darien, yet existing in Choco under the name of Chuanas or Gaunas or Chinos (Dariente). Ugly black or red Negroes.
The Manabies of Popayan (in Columbia) blackish with Negro features and hair.
The Guabas and Jaras of Tagugalpa (Tegucigalpa) near the Honduras. The Enslen or Esteros of New California, ugly blackish Negroes.
The black Indians met by the Spaniards in Louisiana in 1543.
The Moon-eyed Negroes, and Albinos, destroyed by the Cherokees, and seen in Panama."
This is a huge load of information. So I will like to know the position of modern scholarship on this issue. I would also like to know the credibility of this writer, and the factors that may have led him to publish this work.