Coendou nycthemera Olfers 1818
Coendou nycthemera Olfers 1818, Neue Bibl. Reisenb.: 211.
Type Locality: Brazil, E Amazonia, south of the main channel of the Rio Amazonas; as restricted by Voss and Angermann (1997).
Vernacular Names: Black Dwarf Porcupine.
Synonyms: Coendou koopmani Handley and Pine 1992 .
Distribution: Amazonian lowlands east of Rio Madeira and south of the Rio Amazonas, including at least part of Marajó Isl.
Conservation: IUCN – Lower Risk (lc) as C. koopmani .
Discussion: Sympatric with C. prehensilis throughout its range.